Need help with a code, dealer can't find it.
Thread Starter
Registered User
Joined: Dec 2005
Posts: 351
Likes: 1
From: Lexington, NC
Need help with a code, dealer can't find it.
Go a code today on the dash when you toggle the switch three times, a P0882 which is trans relay control, and the other is a P2769 which the dealership could not find. Any help would be great. On a side note, my 3rd walbro lift pump has taken a dump and I do not know if that is related.
Chapter President
Joined: Apr 2007
Posts: 9,375
Likes: 7
From: misplaced Idahoan stuck in Albuquerque, Roughneckin on RIG 270
from dealer connect
P1740-TCC O/D SOL PERFORMANCE (DIESEL)
For a complete wiring diagramRefer to Section 8W
Theory of Operation
The Torque Converter Clutch (TCC) Solenoid is used to engage the TCC which inproves fuel economy.
When Monitored:
The Torque Convertor Clutch (TCC) and Overdrive Clutch (O/D) will be tested each time the ECM requests TCC engagement in 3rd gear and O/D.
Set Condition:
The DTC will set if the expected RPM drop is not achieved while attempting to engage TCC or O/D. This indicates a malfunctioning torque convertor or overdrive clutch.
Possible Causes
ENGINE DTCS PRESENT
TRANSMISSION DTCS PRESENT
TRANSMISSION TEMPERATURE TOO COLD
OIL PAN CONTAINS EXCESSIVE DEBRIS
3-4 SHIFT SOLENOID
SHAFT OR SEAL DAMAGE
TCC SOLENOID
TORQUE CONVERTER
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
Diagnostic Test
1. ENGINE DTCS PRESENT
--------------------------------------------------------------------------------
Ignition on, engine not running.
With the scan tool, read Engine DTCs.
Are there any Engine Temperature, Cam, Engine RPM, Misfire, P/N, or TPS DTC's present?
Yes
Refer to 9 - ENGINE ELECTRICAL DIAGNOSTICS - DIESEL and perform the appropriate symptom.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Go To 2
2. CHECK FOR OTHER TRANSMISSION DTCS PRESENT
--------------------------------------------------------------------------------
Are any of the DTCs P0720, P0973, P0974, P2769, and/or P2770, also present?
Yes
Refer to the Transmission category, and perform the appropriate symptom(s). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - DIAGNOSIS AND TESTING)
No
Go To 3
3. CHECK IF THE DTC IS CURRENT
--------------------------------------------------------------------------------
With the scan tool, read Engine DTCs.
Record the Freeze Frame data for the reported DTC.
With the scan tool, erase DTCs.
Turn the ignition off to the lock position.
Using the Freeze Frame data recorded earlier, try to duplicate the conditions in which the DTC originally set.
NOTE: It may be necessary to road test the vehicle to duplicate the original set conditions.
With the scan tool, read Engine DTCs.
Did the DTC reset?
Yes
Go To 4
No
Go To 14
4. VERIFY THE TOW/ HAUL OVERDRIVE FEATURE
--------------------------------------------------------------------------------
NOTE: The transmission fluid temperature must be above 0.0° C (32° F) before proceeding.
With the scan tool, build a custom display using: Engine RPM, Output Shaft Speed, TCC Solenoid, O/D Solenoid and TPS.
NOTE: This display will monitor the operation of the components.
Start the engine, turn off Overdrive or Tow Haul and test drive the vehicle.
Attain a steady speed of 88.5 Km/h or 55 MPH with a minimum of 1.15 volts throttle opening for 20 seconds.
NOTE: Check the Shift pattern as the vehicle upshifts to speeds of 88.5 Km/h or 55 MPH.
Is the Engine RPM within 60 RPM of the Output Shaft Speed RPM?
Yes
Go To 10
No
Go To 5
5. CHECK IF THE OUTPUT SPEED IS GREATER THAN ENGINE RPM
--------------------------------------------------------------------------------
In the previous test, is the Output Shaft Speed greater than Engine RPM?
Yes
Go To 6
No
Go To 10
6. CALCULATE EXPECTED ENGINE RPM
--------------------------------------------------------------------------------
With the scan tool, build a custom display using: Engine RPM, Output Shaft Speed, TCC Solenoid, O/D Solenoid and TPS.
NOTE: This display will monitor the operation of the components.
Start the engine, turn off Overdrive or Tow Haul and test drive the vehicle.
Attain a steady speed of 88.5 Km/h or 55 MPH with a minimum of 1.15 volts throttle opening for 20 seconds.
With the scan tool, verify the 3-4 Solenoid (O/D) Solenoid is on and the TCC solenoid is locked
NOTE: Use this formula, Output Shaft Speed x 0.69 = expected Engine RPM.
Did the Engine RPM drop to 0.69 of the Output Shaft Speed RPM?
Yes
Go To 10
No
Go To 7
7. GOVERNOR PRESSURE SYSTEM TEST
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Connect a 0 to 2068 Kpa or 0 to 300 PSI pressure gauge to the Overdrive Clutch Test Port.
Connect a 0 to 2068 Kpa or 0 to 300 PSI pressure gauge to the Governor Test Port.
Start the engine.
NOTE: Allow the transmission temperature to rise to normal operating temperature.
While observing both pressure gauges, select 4th Gear from Gov and 3-4 System Test.
NOTE: The Governor pressure should rise to above 137.8 Kpa or 20 PSI, shortly after the OD pressure should rise above 275.7 Kpa or 40 PSI.
Did the pressures act as described?
Yes
Go To 8
No
Go To 9
8. CHECK IF THE OIL PAN CONTAINS EXCESSIVE DEBRIS
--------------------------------------------------------------------------------
Remove the transmission oil pan per the Service information.
Is the transmissin fluid burnt or does the transmissin oil pan contain excessive debris?
Yes
Repair internal transmission as necessary. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - REMOVAL)
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MODULE - DIAGNOSIS AND TESTING)
No
Go To 10
9. CHECK THE 3-4 SHIFT SOLENOID
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Replace the 3-4 Solenoid per the Service information.(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE/VALVE BODY - REMOVAL)
Connect a 0 to 2068 Kpa or 0 to 300 PSI pressure gauge to the Overdrive Clutch Test Port.
Connect a 0 to 2068 Kpa or 0 to 300 PSI pressure gauge to the Governor Test Port.
Start the engine.
NOTE: Allow the transmission temperature to rise to normal operating temperature.
While observing both pressure gauges, select 4th gear from the Governor 3-4 shift valve system test.
NOTE: The Governor pressure should rise above 137.8 Kpa or 20 PSI, shortly after the OD pressure should rise above 275.7 Kpa or 40 PSI.
Did the pressures act as described?
Yes
Test Complete.
No
Overhaul the transmission per the Service information. Carefully inspect the seals and clutches related to the OD Clutch. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - REMOVAL)
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
10. TORQUE CONVERTER CLUTCH
--------------------------------------------------------------------------------
Turn the ignition on.
With the scan tool, perform the Torque Converter Clutch test.
Did the engine stall?
Yes
Go To 11
No
Go To 13
11. GOVERNOR/3-4 SHIFT VALVE
--------------------------------------------------------------------------------
Start the engine.
Perform the Governor and 3-4 Shift Valve System Test, select 4th gear.
Did the engine stall?
Yes
Go To 12
No
Go To 13
12. TCC SOLENOID
--------------------------------------------------------------------------------
Replace the TCC Solenoid. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE/VALVE BODY - REMOVAL)
With the scan tool, perform the Governor and 3-4 Solenoid test, select 4th gear.
Did the engine stall?
Yes
Repair internal transmission as necessary. Check for blocked passages. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - REMOVAL)
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Test Complete.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
13. SHAFT OR SEAL DAMAGE
--------------------------------------------------------------------------------
Remove the Transmission Oil Pump per the Service information.(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE/OIL PUMP - DISASSEMBLY)
Inspect the Reaction shaft, Input Shaft and Input seal.
Are any of the parts damaged or worn?
Yes
Repair as necessary, also replace the Torque Converter.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Replace the Torque Converter. NOTE: Inspect the Reaction Shaft, Input Shaft and Input Seal. Replace as necessary if any of the parts are damaged or worn.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
14. INTERMITTENT WIRING & CONNECTORS
--------------------------------------------------------------------------------
The conditions necessary to set this DTC are not present at this time.
Use the Freeze Frame Data to help duplicate the conditions in which the DTC originally set. Pay particular attention to the DTC set conditions, such as, VSS, MAP, ECT, and Load
Using the schematics as a guide, visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Wiggle the wiring and connectors while checking for any possible open or shorted circuits.
Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.
Were there any problems found?
Yes
Repair as necessary.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Test Complete.
P1740-TCC O/D SOL PERFORMANCE (DIESEL)
For a complete wiring diagramRefer to Section 8W
Theory of Operation
The Torque Converter Clutch (TCC) Solenoid is used to engage the TCC which inproves fuel economy.
When Monitored:
The Torque Convertor Clutch (TCC) and Overdrive Clutch (O/D) will be tested each time the ECM requests TCC engagement in 3rd gear and O/D.
Set Condition:
The DTC will set if the expected RPM drop is not achieved while attempting to engage TCC or O/D. This indicates a malfunctioning torque convertor or overdrive clutch.
Possible Causes
ENGINE DTCS PRESENT
TRANSMISSION DTCS PRESENT
TRANSMISSION TEMPERATURE TOO COLD
OIL PAN CONTAINS EXCESSIVE DEBRIS
3-4 SHIFT SOLENOID
SHAFT OR SEAL DAMAGE
TCC SOLENOID
TORQUE CONVERTER
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
Diagnostic Test
1. ENGINE DTCS PRESENT
--------------------------------------------------------------------------------
Ignition on, engine not running.
With the scan tool, read Engine DTCs.
Are there any Engine Temperature, Cam, Engine RPM, Misfire, P/N, or TPS DTC's present?
Yes
Refer to 9 - ENGINE ELECTRICAL DIAGNOSTICS - DIESEL and perform the appropriate symptom.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Go To 2
2. CHECK FOR OTHER TRANSMISSION DTCS PRESENT
--------------------------------------------------------------------------------
Are any of the DTCs P0720, P0973, P0974, P2769, and/or P2770, also present?
Yes
Refer to the Transmission category, and perform the appropriate symptom(s). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - DIAGNOSIS AND TESTING)
No
Go To 3
3. CHECK IF THE DTC IS CURRENT
--------------------------------------------------------------------------------
With the scan tool, read Engine DTCs.
Record the Freeze Frame data for the reported DTC.
With the scan tool, erase DTCs.
Turn the ignition off to the lock position.
Using the Freeze Frame data recorded earlier, try to duplicate the conditions in which the DTC originally set.
NOTE: It may be necessary to road test the vehicle to duplicate the original set conditions.
With the scan tool, read Engine DTCs.
Did the DTC reset?
Yes
Go To 4
No
Go To 14
4. VERIFY THE TOW/ HAUL OVERDRIVE FEATURE
--------------------------------------------------------------------------------
NOTE: The transmission fluid temperature must be above 0.0° C (32° F) before proceeding.
With the scan tool, build a custom display using: Engine RPM, Output Shaft Speed, TCC Solenoid, O/D Solenoid and TPS.
NOTE: This display will monitor the operation of the components.
Start the engine, turn off Overdrive or Tow Haul and test drive the vehicle.
Attain a steady speed of 88.5 Km/h or 55 MPH with a minimum of 1.15 volts throttle opening for 20 seconds.
NOTE: Check the Shift pattern as the vehicle upshifts to speeds of 88.5 Km/h or 55 MPH.
Is the Engine RPM within 60 RPM of the Output Shaft Speed RPM?
Yes
Go To 10
No
Go To 5
5. CHECK IF THE OUTPUT SPEED IS GREATER THAN ENGINE RPM
--------------------------------------------------------------------------------
In the previous test, is the Output Shaft Speed greater than Engine RPM?
Yes
Go To 6
No
Go To 10
6. CALCULATE EXPECTED ENGINE RPM
--------------------------------------------------------------------------------
With the scan tool, build a custom display using: Engine RPM, Output Shaft Speed, TCC Solenoid, O/D Solenoid and TPS.
NOTE: This display will monitor the operation of the components.
Start the engine, turn off Overdrive or Tow Haul and test drive the vehicle.
Attain a steady speed of 88.5 Km/h or 55 MPH with a minimum of 1.15 volts throttle opening for 20 seconds.
With the scan tool, verify the 3-4 Solenoid (O/D) Solenoid is on and the TCC solenoid is locked
NOTE: Use this formula, Output Shaft Speed x 0.69 = expected Engine RPM.
Did the Engine RPM drop to 0.69 of the Output Shaft Speed RPM?
Yes
Go To 10
No
Go To 7
7. GOVERNOR PRESSURE SYSTEM TEST
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Connect a 0 to 2068 Kpa or 0 to 300 PSI pressure gauge to the Overdrive Clutch Test Port.
Connect a 0 to 2068 Kpa or 0 to 300 PSI pressure gauge to the Governor Test Port.
Start the engine.
NOTE: Allow the transmission temperature to rise to normal operating temperature.
While observing both pressure gauges, select 4th Gear from Gov and 3-4 System Test.
NOTE: The Governor pressure should rise to above 137.8 Kpa or 20 PSI, shortly after the OD pressure should rise above 275.7 Kpa or 40 PSI.
Did the pressures act as described?
Yes
Go To 8
No
Go To 9
8. CHECK IF THE OIL PAN CONTAINS EXCESSIVE DEBRIS
--------------------------------------------------------------------------------
Remove the transmission oil pan per the Service information.
Is the transmissin fluid burnt or does the transmissin oil pan contain excessive debris?
Yes
Repair internal transmission as necessary. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - REMOVAL)
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MODULE - DIAGNOSIS AND TESTING)
No
Go To 10
9. CHECK THE 3-4 SHIFT SOLENOID
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Replace the 3-4 Solenoid per the Service information.(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE/VALVE BODY - REMOVAL)
Connect a 0 to 2068 Kpa or 0 to 300 PSI pressure gauge to the Overdrive Clutch Test Port.
Connect a 0 to 2068 Kpa or 0 to 300 PSI pressure gauge to the Governor Test Port.
Start the engine.
NOTE: Allow the transmission temperature to rise to normal operating temperature.
While observing both pressure gauges, select 4th gear from the Governor 3-4 shift valve system test.
NOTE: The Governor pressure should rise above 137.8 Kpa or 20 PSI, shortly after the OD pressure should rise above 275.7 Kpa or 40 PSI.
Did the pressures act as described?
Yes
Test Complete.
No
Overhaul the transmission per the Service information. Carefully inspect the seals and clutches related to the OD Clutch. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - REMOVAL)
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
10. TORQUE CONVERTER CLUTCH
--------------------------------------------------------------------------------
Turn the ignition on.
With the scan tool, perform the Torque Converter Clutch test.
Did the engine stall?
Yes
Go To 11
No
Go To 13
11. GOVERNOR/3-4 SHIFT VALVE
--------------------------------------------------------------------------------
Start the engine.
Perform the Governor and 3-4 Shift Valve System Test, select 4th gear.
Did the engine stall?
Yes
Go To 12
No
Go To 13
12. TCC SOLENOID
--------------------------------------------------------------------------------
Replace the TCC Solenoid. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE/VALVE BODY - REMOVAL)
With the scan tool, perform the Governor and 3-4 Solenoid test, select 4th gear.
Did the engine stall?
Yes
Repair internal transmission as necessary. Check for blocked passages. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - REMOVAL)
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Test Complete.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
13. SHAFT OR SEAL DAMAGE
--------------------------------------------------------------------------------
Remove the Transmission Oil Pump per the Service information.(Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE/OIL PUMP - DISASSEMBLY)
Inspect the Reaction shaft, Input Shaft and Input seal.
Are any of the parts damaged or worn?
Yes
Repair as necessary, also replace the Torque Converter.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Replace the Torque Converter. NOTE: Inspect the Reaction Shaft, Input Shaft and Input Seal. Replace as necessary if any of the parts are damaged or worn.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
14. INTERMITTENT WIRING & CONNECTORS
--------------------------------------------------------------------------------
The conditions necessary to set this DTC are not present at this time.
Use the Freeze Frame Data to help duplicate the conditions in which the DTC originally set. Pay particular attention to the DTC set conditions, such as, VSS, MAP, ECT, and Load
Using the schematics as a guide, visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Wiggle the wiring and connectors while checking for any possible open or shorted circuits.
Check for any Service Information Tune-ups or Technical Service Bulletins that may apply.
Were there any problems found?
Yes
Repair as necessary.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Test Complete.
Chapter President
Joined: Apr 2007
Posts: 9,375
Likes: 7
From: misplaced Idahoan stuck in Albuquerque, Roughneckin on RIG 270
there is a lot of diagrams on this one. pm me your email address and I can get you the complete with pics
P2769-TRANSMISSION TCC CONTROL CIRCUIT LOW
For a complete wiring diagramRefer to Section 8W
Theory of Operation
The Torque Converter Clutch (TCC) solenoid is used to engage the TCC which improves fuel economy.
When Monitored:
Continuously with the ignition on.
Set Condition:
This DTC will set if the voltage detected by the ECM for the Torque Converter Clutch Solenoid Control circuit is different than the expected voltage. Note: To clear this DTC it is necessary to drive the vehicle at a sustained speed which would allow the TCC and/or Overdrive Clutch to operate.
Possible Causes
TRANSMISSION CONTROL RELAY DTCS PRESENT
(F941) FUSED IGNITION SWITCH OUTPUT CIRCUIT (RUN-START) OPEN
(T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
(T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT TO GROUND
(T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND
(T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO OTHER CIRCUITS
TRANSMISSION CONTROL RELAY - POOR CONTACTS
TORQUE CONVERTER CLUTCH SOLENOID
ENGINE CONTROL MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
Diagnostic Test
1. CHECK IF THERE ANY TRANSMISSION CONTROL RELAY DTCS PRESENT
--------------------------------------------------------------------------------
Ignition on, engine not running.
With the scan tool, read Engine DTCs.
Are there any Transmission Control Relay DTCs also present?
Yes
Refer to the Transmission category and perform the appropriate symptom(s). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - DIAGNOSIS AND TESTING)
No
Go To 2
2. CHECK IF THE DTC IS CURRENT
--------------------------------------------------------------------------------
With the scan tool, read Engine DTCs.
Record the Freeze Frame data for the reported DTC.
With the scan tool, erase DTCs.
Turn the ignition off to the lock position.
Using the Freeze Frame data recorded earlier, try to duplicate the conditions in which the DTC originally set.
NOTE: It may be necessary to road test the vehicle to duplicate the original set conditions.
With the scan tool, read Engine DTCs.
Did the DTC reset?
Yes
Go To 3
No
Go To 11
3. CHECK THE (T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
With the scan tool, actuate the Transmission Control Relay.
Using a 12-volt test light connected to ground, check the (T16) Transmission Control Relay Output circuit in the Transmission Solenoid Assembly harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Does the test light cycle on and off and illuminate brightly?
Yes
Go To 4
No
Go To 8
4. CHECK THE (T75) TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
Ignition on, engine not running.
With the scan tool, actuate the TCC Solenoid.
Using a 12-volt test light connected to 12-volts, check the (T75) TCC Solenoid Control circuit in the Transmission Solenoid Assembly harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Does the test light cycle on and off and illuminate brightly?
Yes
Check all internal wiring pertaining to the (T75) TCC Solenoid for an open, short, and bent or broken terminals. If no internal wiring problems are found, replace the Transmission Solenoid Assembly per the Service Information. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE/VALVE BODY - REMOVAL)
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Go To 5
5. (T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the (T75) TCC Solenoid Control circuit.
Is the resistance below 5.0 ohms?
Yes
Repair the (T75) TCC Solenoid Control circuit for a short to ground.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Go To 6
6. (T75) TCC SOLENOID CONTROL CIRCUIT OPEN
--------------------------------------------------------------------------------
Measure the resistance of the (T75) TCC Solenoid Control circuit between the ECM C2 harness connector and the Transmission Solenoid Assembly harness connector.
Is the resistance below 5.0 ohms?
Yes
Repair the (T75) TCC Solenoid Control circuit for an open.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Go To 7
7. (T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO OTHER CIRCUITS
--------------------------------------------------------------------------------
Measure the resistance between the (T75) TCC Solenoid Control circuit and all other circuits in the Transmission Solenoid Assembly harness connector.
Is the resistance below 5.0 ohms between the (T75) TCC Solenoid Control circuit and any other circuit in the Transmission Solenoid Assembly harness connector?
Yes
Repair the (T75) TCC Solenoid Control circuit for a short to another circuit(s).
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Using the schematics as a guide, check the Engine Control Module (ECM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the ECM per the Service Information. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/ENGINE CONTROL MODULE - REMOVAL)
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
8. (941) FUSED IGNITION SWITCH OUPUT (RUN-START) CIRCUIT OPEN
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Remove the Transmission Control Relay.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, check the (F941) Fused Ignition Swich Output (Run-Start) circuit in the Transmission Control Relay connector.
Does the test light illuminate brightly?
Yes
Go To 9
No
Repair the (F941) Fused Ignition Swich Output (Run-Start) circuit for an open.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
9. (T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
--------------------------------------------------------------------------------
Connect a jumper wire between the Fused B(+) circuit and the Transmission Control Relay Output circuit in the Transmission Control Relay connector.
Using a 12-volt test light connected to ground, check the Fused Transmission Relay Control Output circuit in the Transmission Solenoid Assembly harness connector.
Does the test light illuminate brightly?
Yes
Go To 10
No
Repair the (T16) Transmission Control Relay Output circuit for an open. If the fuse is open make sure to check for a short to ground.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
10. (T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT TO GROUND
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Measure the resistance between ground and the (T16) Transmission Control Relay Output circuit in the Transmission Control Relay connector.
Is the resistance above 100k ohms?
Yes
Replace the Transmission Control Relay.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MODULE - DIAGNOSIS AND TESTING)
No
Repair the (T16) Transmission Control Relay Output circuit for a short to ground.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
11. INTERMITTENT WIRING AND CONNECTORS
--------------------------------------------------------------------------------
The conditions necessary set this DTC are not present at this time.
Use the Freeze Frame Data to help duplicate the conditions that set the DTC. Pay particular attention to the DTC set conditions, such as, VSS, MAP, ECT, and Load.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Refer to any technical service bulletins that may apply.
Were there any problems found?
Yes
Repair as necessary.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Test Complete.
P2769-TRANSMISSION TCC CONTROL CIRCUIT LOW
For a complete wiring diagramRefer to Section 8W
Theory of Operation
The Torque Converter Clutch (TCC) solenoid is used to engage the TCC which improves fuel economy.
When Monitored:
Continuously with the ignition on.
Set Condition:
This DTC will set if the voltage detected by the ECM for the Torque Converter Clutch Solenoid Control circuit is different than the expected voltage. Note: To clear this DTC it is necessary to drive the vehicle at a sustained speed which would allow the TCC and/or Overdrive Clutch to operate.
Possible Causes
TRANSMISSION CONTROL RELAY DTCS PRESENT
(F941) FUSED IGNITION SWITCH OUTPUT CIRCUIT (RUN-START) OPEN
(T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
(T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT TO GROUND
(T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND
(T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO OTHER CIRCUITS
TRANSMISSION CONTROL RELAY - POOR CONTACTS
TORQUE CONVERTER CLUTCH SOLENOID
ENGINE CONTROL MODULE
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
Diagnostic Test
1. CHECK IF THERE ANY TRANSMISSION CONTROL RELAY DTCS PRESENT
--------------------------------------------------------------------------------
Ignition on, engine not running.
With the scan tool, read Engine DTCs.
Are there any Transmission Control Relay DTCs also present?
Yes
Refer to the Transmission category and perform the appropriate symptom(s). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - DIAGNOSIS AND TESTING)
No
Go To 2
2. CHECK IF THE DTC IS CURRENT
--------------------------------------------------------------------------------
With the scan tool, read Engine DTCs.
Record the Freeze Frame data for the reported DTC.
With the scan tool, erase DTCs.
Turn the ignition off to the lock position.
Using the Freeze Frame data recorded earlier, try to duplicate the conditions in which the DTC originally set.
NOTE: It may be necessary to road test the vehicle to duplicate the original set conditions.
With the scan tool, read Engine DTCs.
Did the DTC reset?
Yes
Go To 3
No
Go To 11
3. CHECK THE (T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Ignition on, engine not running.
With the scan tool, actuate the Transmission Control Relay.
Using a 12-volt test light connected to ground, check the (T16) Transmission Control Relay Output circuit in the Transmission Solenoid Assembly harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Does the test light cycle on and off and illuminate brightly?
Yes
Go To 4
No
Go To 8
4. CHECK THE (T75) TORQUE CONVERTER CLUTCH SOLENOID CIRCUIT
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
Ignition on, engine not running.
With the scan tool, actuate the TCC Solenoid.
Using a 12-volt test light connected to 12-volts, check the (T75) TCC Solenoid Control circuit in the Transmission Solenoid Assembly harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
Does the test light cycle on and off and illuminate brightly?
Yes
Check all internal wiring pertaining to the (T75) TCC Solenoid for an open, short, and bent or broken terminals. If no internal wiring problems are found, replace the Transmission Solenoid Assembly per the Service Information. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE/VALVE BODY - REMOVAL)
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Go To 5
5. (T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the (T75) TCC Solenoid Control circuit.
Is the resistance below 5.0 ohms?
Yes
Repair the (T75) TCC Solenoid Control circuit for a short to ground.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Go To 6
6. (T75) TCC SOLENOID CONTROL CIRCUIT OPEN
--------------------------------------------------------------------------------
Measure the resistance of the (T75) TCC Solenoid Control circuit between the ECM C2 harness connector and the Transmission Solenoid Assembly harness connector.
Is the resistance below 5.0 ohms?
Yes
Repair the (T75) TCC Solenoid Control circuit for an open.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Go To 7
7. (T75) TCC SOLENOID CONTROL CIRCUIT SHORT TO OTHER CIRCUITS
--------------------------------------------------------------------------------
Measure the resistance between the (T75) TCC Solenoid Control circuit and all other circuits in the Transmission Solenoid Assembly harness connector.
Is the resistance below 5.0 ohms between the (T75) TCC Solenoid Control circuit and any other circuit in the Transmission Solenoid Assembly harness connector?
Yes
Repair the (T75) TCC Solenoid Control circuit for a short to another circuit(s).
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Using the schematics as a guide, check the Engine Control Module (ECM) pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace and program the ECM per the Service Information. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/ENGINE CONTROL MODULE - REMOVAL)
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
8. (941) FUSED IGNITION SWITCH OUPUT (RUN-START) CIRCUIT OPEN
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Remove the Transmission Control Relay.
Ignition on, engine not running.
Using a 12-volt test light connected to ground, check the (F941) Fused Ignition Swich Output (Run-Start) circuit in the Transmission Control Relay connector.
Does the test light illuminate brightly?
Yes
Go To 9
No
Repair the (F941) Fused Ignition Swich Output (Run-Start) circuit for an open.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
9. (T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT OPEN
--------------------------------------------------------------------------------
Connect a jumper wire between the Fused B(+) circuit and the Transmission Control Relay Output circuit in the Transmission Control Relay connector.
Using a 12-volt test light connected to ground, check the Fused Transmission Relay Control Output circuit in the Transmission Solenoid Assembly harness connector.
Does the test light illuminate brightly?
Yes
Go To 10
No
Repair the (T16) Transmission Control Relay Output circuit for an open. If the fuse is open make sure to check for a short to ground.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
10. (T16) TRANSMISSION CONTROL RELAY OUTPUT CIRCUIT SHORT TO GROUND
--------------------------------------------------------------------------------
Turn the ignition off to the lock position.
Measure the resistance between ground and the (T16) Transmission Control Relay Output circuit in the Transmission Control Relay connector.
Is the resistance above 100k ohms?
Yes
Replace the Transmission Control Relay.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/TRANSMISSION CONTROL MODULE - DIAGNOSIS AND TESTING)
No
Repair the (T16) Transmission Control Relay Output circuit for a short to ground.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
11. INTERMITTENT WIRING AND CONNECTORS
--------------------------------------------------------------------------------
The conditions necessary set this DTC are not present at this time.
Use the Freeze Frame Data to help duplicate the conditions that set the DTC. Pay particular attention to the DTC set conditions, such as, VSS, MAP, ECT, and Load.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Refer to any technical service bulletins that may apply.
Were there any problems found?
Yes
Repair as necessary.
Perform RE TRANSMISSION VERIFICATION TEST VER - 1 (DIESEL). (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - 48RE - STANDARD PROCEDURE)
No
Test Complete.
Thread Starter
Registered User
Joined: Dec 2005
Posts: 351
Likes: 1
From: Lexington, NC
I have a Dave Georend built tranny with a lock-up switch. Would an aftermarket converter or the lock-up switch cause this problem? We cleared the codes out and started the truck and the codes came back up immediately without doing anything to the truck but start it.
Chapter President
Joined: Apr 2007
Posts: 9,375
Likes: 7
From: misplaced Idahoan stuck in Albuquerque, Roughneckin on RIG 270
aftermarket items have issues too. Not saying it is the issue but the second trouble tree I posted has a lot of diagrams on it to check pins on connectors etc.. Check all grounds first.
Thread
Thread Starter
Forum
Replies
Last Post
Totallyrad
General Diesel Discussion
13
Jul 19, 2011 07:41 AM
Friction
3rd Gen Engine and Drivetrain -> 2003-2007
17
Oct 25, 2010 03:02 PM
subspd
General Diesel Discussion
15
May 20, 2007 10:15 PM
O5DodgeRam5.9
3rd Generation Ram - Non Drivetrain - All Years
11
Feb 22, 2007 04:11 PM
bigwheels94
3rd Gen High Performance and Accessories (5.9L Only)
3
Jun 23, 2006 12:49 AM