I ran a guage check the other day and after it did it's thing, I got this message "C-Code 64 31". Anybody have any idea what this is supposed to mean? I haven't had any problems with the guages (except the identified occassional "check guages" light flash). Thanks for your help.

 

These are the Instrument Cluster diagnostic codes and definition. I don't have the diagnostic manuals availble until I get the other computer fixed. But this is the list from 04 manual I think.

The first two characters that display are the code definition. The second two numbers are the number of key cycles since the code or with the code, can't remember right now.

Instrument Cluster Diagnostic Trouble Codes
01 Airbag warning indicator output circuit shorted
02 Airbag warning indicator output circuit open
03 ABS indicator output circuit shorted
04 ABS indicator output circuit open
05 MIL indicator output circuit shorted
06 MIL indicator output circuit open
07 Wait to start indicator output circuit shorted
08 Wait to start indicator output circuit open
0B BTSI output circuit shorted or open
0C PRNDL switch input circuit shorted
0D PRNDL switch input circuit open
20 Panel dimmer input circuit shorted
21 Panel dimmer input circuit open
22 Headlamp switch input circuit shorted
23 Headlamp switch input circuit open
24 Turn hazard switch input circuit shorted
25 Turn hazard switch input circuit open
26 Panel illumination output circuit shorted or open
27 Courtesy/dome lamp output circuit shorted or open
28 Glovebox/map lamp output circuit shorted or open
29 Cargo lamp output circuit shorted or open
40 Wiper switch input circuit shorted
41 Wiper switch input circuit open
42 Wash/beam input circuit open
60 Passenger door lock switch input circuit shorted
61 Passenger door lock switch input circuit open or short to voltage
62 Passenger door lock switch input circuit stuck
63 Driver door lock switch input circuit shorted
64 Driver door lock switch input circuit open or short to voltage
65 Driver door lock switch input circuit stuck
66 All door lock output circuit shorted to ground or voltage
67 All door unlock output circuit shorted to ground or voltage
68 Driver door unlock output circuit shorted to ground or voltage
69 Passenger cylinder lock switch input circuit shorted
6B Passenger cylinder lock switch input circuit stuck
6C Driver cylinder lock switch input circuit shorted
6E Driver cylinder lock switch input circuit stuck
80 Incorrect odometer value found
81 Remote radio switch circuit high
82 Remote radio switch circuit stuck
A0 Internal module FLASH memory checksum failure
A1 Internal module bootloader failure
A3 BATTERY voltage open
A4 Ignition RUN/START circuit rationality check
A5 TCCM messges not received
A6 Ignition UNLOCK circuit rationality check
A7 VIN checksum error
A8 VIN previously stored
A9 PCI Bus internal failure
AA PCM messages not received
AB TCM messages not received
AC ABS messages not received
AD FCM messages not received
AE ACM messages not received
AF SKIM messages not received
B0 RKE fob battery low
B1 RKE module communication link
B2 Cluster mismatch

 

The text “C Code” is displayed in the odometer VFD for about three seconds. If there is no stored fault information, the display will show two pairs of zeroes in the format “00” “00”, which indicate that the display of fault information is done. If there is stored fault information, two sets of two-digit alpha and alpha-numeric fault codes will appear in the odometer display for a three second interval. The first pair of digits represents a Diagnostic Trouble Code (DTC), or fault code for the instrument cluster. The second pair of digits is a counter for the number of ignition key cycles that have occurred since the displayed DTC was set. The instrument cluster will continue to display additional sets of two pairs of digits at three second intervals until all of the stored codes have been displayed, which is again signaled by a code of “00” “00”. Refer to the Instrument Cluster Failure Message table for a description of each fault code that the instrument cluster displays. If an instrument cluster fault is displayed, use a DRBIII® scan tool to diagnose the problem. Refer to the appropriate diagnostic information.

The list of code definitions was the same as above.

 

thanks Mr info keep it up

 

From the diagnostic manual. This is just the first part of diagnostics info. Everything else is related to using a DRBIII for testing process.

When Monitored and Set Condition:

DRIVER DOOR LOCK SWITCH INPUT CIRCUIT OPEN OR SHORT TO VOLTAGE

When Monitored: At all times when battery power is supplied to the Instrument Cluster.
Set Condition: When the Instrument Cluster senses voltage to the driver door lock switch
above 4.85 volts.

POSSIBLE CAUSES DTC PRESENT
INSTRUMENT CLUSTER - DRIVER DOOR LOCK SWITCH VOLTAGE LOW
DOOR LOCK SWITCH GROUND OPEN
DRIVER DOOR LOCK SWITCH MUX WIRE SHORT TO VOLTAGE
INSTRUMENT CLUSTER - VOLTAGE TO HIGH
DRIVER DOOR LOCK SWITCH MUX CIRCUIT OPEN
DOOR LOCK SWITCH - SHORT TO VOLTAGE
DOOR LOCK SWITCH OPEN

 

Technology & electronics - don't ya just love 'em!!

 

Thanks everyone. I don't like the fact that the "31" code isn't even listed. Maybe I invented something new to go wrong with my truck! I assume I can clear these codes if I disconnect the batteries and see if they come back? Or does it need to be hooked up to a scan tool to be cleared? I may have gotten the "64" code when I took the driver's door panel off to replace the speakers. Thanks again.

 

That isn't a code. ^

 

Thanks vzdude! That would make sense then. I probably tripped the code when I was screwing around and the 31 cycles would jive with that. Do you know if these codes will reset if I disconnect the batteries?

 

I wouldn't even mess with that, they will reset eventually after enough key cycles.