maulmaniac

Replaced some frayed wiring when I got a p0500. Now a new problem arose. My computer reader wont connect, I have no instruments working, the brake , Abs, fuel, and other lights stay on, and my digital mileage window flashes. P1693 code appeared before I started working on it. Any ideas? I undid everything I worked on and the problem still there! the truck runs ok.

M

BigIron70

does it flash NO BUS at odometer?

BigIron70

P1693 is a code that is directing you to check for fault codes in the other controller, JTEC controller.


P-0500 NO VEHICLE SPEED SIGNAL (Read PDF diag below) Check Vehicle Speed Sensor in diff most likely defective.




SELF-DIAGNOSTIC TEST
The instrument cluster self-diagnostic test will put the instrument cluster into its self-diagnostic mode. In this mode the instrument cluster can perform a self-diagnostic test that will confirm that the instrument cluster circuitry, the gauges, and the CCD data bus message-controlled indicator lamps are capable of operating as designed.

However, there may still be a problem with the CCD data bus, the Powertrain Control Module (PCM), the Airbag Control Module (ACM), the Controller Anti-lock Brake (CAB), or the inputs to one of these electronic control modules. Use a DRB scan tool and the proper Diagnostic Procedures manual for testing of these components.

1.Begin the test with the ignition switch in the Off position.
2.Depress the trip odometer reset button.
3.While holding the trip odometer reset button depressed, turn the ignition switch to the On position, but do not start the engine.
4.Keep the trip odometer reset button depressed for about ten seconds, until CHEC appears in the odometer display, then release the odometer reset button.
5.A series of three-digit numeric failure messages may appear in the odometer display, depending upon the failure mode. If a failure message appears, see the Instrument Cluster Failure Message chart for the description and proper correction. If no failure message appears, the self-diagnostic test will proceed as described in Step 6.
INSTRUMENT CLUSTER FAILURE MESSAGE
Message Description Correction
110 A failure has been identified in the cluster CPU, RAM, or EEPROM. 1. Replace the faulty cluster.
900 The CCD data bus is not operational. 1. Check the CCD data bus connections at the cluster.
2. Check the cluster fuses.
3. Check the CCD data bus bias.
4. Check the CCD data bus voltage.
5. Check the CCD data bus terminations.
920 The cluster is not receiving a vehicle speed message from the PCM. 1. Check the PCM software level and reflash if required.
2. Use a DRB scan tool to verify that the vehicle speed message is being sent by the PCM.
921 The cluster is not receiving a distance pulse message from the PCM. 1. Check the PCM software level and reflash if required.
2. Use a DRB scan tool to verify that the distance pulse message is being sent by the PCM.
940 The cluster is not receiving an airbag lamp-on message from the ACM. 1. Check the CCD data bus connections at the ACM.
2. Check the ACM fuse.
950 The cluster is not receiving an ABS lamp-on message from the CAB. 1. Check the CCD data bus connections at the CAB.
2. Check the CAB fuse.
999 An error has been discovered. 1. Record the failure message.
2. Depress the trip odometer reset button to continue the Self-Diagnostic Test.

6.The instrument cluster will begin the odometer walking segment test. This test will require the operator to visually inspect each odometer segment as it is displayed to determine a pass or fail condition. First, all of the segments will be illuminated at once; then, each individual segment of the odometer display will be illuminated in sequence. If any segment in the display fails to illuminate, repeat the test to confirm the failure. If the failure is confirmed, replace the faulty instrument cluster. Following the odometer walking segment test, the self-diagnostic test will automatically proceed as described in Step 7.
7.The instrument cluster will perform a bulb check of each indicator lamp that the instrument cluster circuitry controls. If an individual amber indicator lamp does not illuminate during this test, the instrument cluster should be removed. However, check that the incandescent lamp bulb is not faulty and that the bulb holder is properly installed on the instrument cluster electronic circuit board before considering instrument cluster replacement. If the bulb and bulb holder check OK, replace the faulty instrument cluster. Each of the red indicators are illuminated by a Light Emitting Diode (LED) If an LED fails to illuminate during this test, the instrument cluster must be replaced. Following the bulb check test, the self-diagnostic test will automatically proceed as described in Step 8.
8.The instrument cluster will perform a gauge actuator test. In this test the instrument cluster circuitry positions each of the gauge needles at three different calibration points, then returns the gauge needles to their relaxed positions. If an individual gauge does not respond properly, or does not respond at all during the gauge actuator test, the instrument cluster should be removed. However, check that the gauge terminal pins are properly inserted through the spring-clip terminal pin receptacles on the instrument cluster electronic circuit board before considering instrument cluster replacement. If the gauge terminal connections are OK, replace the faulty instrument cluster.
9.The self-diagnostic test is now completed. The instrument cluster will automatically exit the self-diagnostic mode and return to normal operation at the completion of the test, if the ignition switch is turned to the Off position during the test, or if a vehicle speed message indicating that the vehicle is moving is received from the PCM on the CCD data bus during the test.
10.Go back to Step 1 to repeat the test, if required.