2007 Compass Patriot MK Factory Service Manual 21 - TRANSAXLE

P0602-CONTROL MODULE PROGRAMING ERROR/NOT PROGRAMMED

For a complete wiring diagram Refer to Section 8W.

Theory of Operation

After initial vehicle start, the Transmission Control Module (TCM) looks for a message over the CAN BUS verifying vehicle information which is crucial for transmission configuration. After the information is received it is stored in the EEPROM of the TCM. If the TCM does not receive a valid configuration within a predetermined time, the DTC will set and the MIL will be illuminated.

When Monitored:
After an initial vehicle start with a system voltage between 9.0 and 16.0 volts.
Set Condition:
Transmission Control Module (TCM) does not receive valid vehicle information from the Front Control Module (FCM) for the period of 5 seconds.

Possible Causes

CAN BUS DTCS PRESENT

TOTALLY INTEGRATED CONTROL MODULE (TIPM) NOT PROGRAMED

TRANSMISSION CONTROL MODULE (TCM)

Always perform the CVT Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

Diagnostic Test

1. CHECK FOR CAN BUS DTCS

With the scan tool, check for CAN BUS DTCs.

Are there any CAN BUS DTCs present?

Yes

No

Go To 2

2. CHECK IF CONTROLLER WAS REPLACED

Has the Transmission Control Module been recently replaced?

Yes

Go To 3

No

Go To 5

3. CHECK IF CONTROLLER WAS PROGRAMED

Was the Transmission Control Module flashed?

Yes

Go To 4

No

Flash the control module with the proper part number for the vehicle.
Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

4. CHECK FOR OTHER DTCS

With the scan tool, check Transmission DTCs.

Are the DTCs P0602 and U140F Active and P161B and P1729 Stored?

Yes

Check the Controller part number coincides with the vehicle setup such as engine size or with or without All wheel Drive (AWD). This is an indication of an improper vehicle configuration. Verify all configurations to the Vehicle Identification Number (VIN) and reprogram as necessary.

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

No

Go To 5

5. CHECK THE FCM FOR PROPER PROGRAMING OF TIRE SIZE

With the scan tool, check the TIPM/FCM for proper tire size programing.

Is the tire size properly programed in the TIPM/FCM?

Yes

Using the schematics as a guide, check the Transmission Control Module (TCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. Check for any Service Bulletins for possible causes that may apply. If no problems are found, replace the TCM per the Service Information.

Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)

No

Program the TIPM/FCM with the proper tire size.
Perform CVT VERIFICATION TEST. (Refer to 21 - TRANSMISSION/TRANSAXLE/AUTOMATIC - CVT - STANDARD PROCEDURE)