Diagnostic Test
- CHECK TO SEE IF THE DTC IS ACTIVE
- CHECK FOR OTHER DTCS
- With the scan tool, read Transmission DTCs.
Is the status Active for P0602 also?
Yes
- Refer to appropriate Diagnostic Code Index and perform the appropriate diagnostic procedure.
No
- Go To 3.
- With the scan tool, read Transmission DTCs.
- CHECK THE TCM
Has the TCM been flashed, a new TCM installed or the battery or TCM disconnected with the ignition in the On or Accessory position?
Yes
- This is a normal condition.
Cycle the ignition off for 4 seconds and turn the ignition back on. Erase DTCs and cycle the ignition off again for 4 seconds and turn the ignition back on. Read TCM DTCs. If the DTC resets and remains active - Go To 4.
If the DTC does not reset perform CVT TRANSMISSION VERIFICATION TEST. Refer to Standard Procedure .
No
- 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 and program the TCM in accordance with the Service Information.
- Perform CVT TRANSMISSION VERIFICATION TEST. Refer to Standard Procedure .
NOTE:A loss of the TCM Fused B(+), TCM ground, and/or the Transmission Control Output circuits can cause this fault to set.
- This is a normal condition.
- CHECK IF THE RIGHT PART NUMBER IS USED
- With the scan tool, check the TCM part number and compare it to the vehicle configuration.
Does the controller have the right part number?
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 and program the TCM in accordance with the Service Information.
- Perform CVT TRANSMISSION VERIFICATION TEST. Refer to Standard Procedure .
NOTE:A loss of the TCM Fused B(+), TCM ground, and/or the Transmission Control Output circuits can cause this fault to set.
No
- Do to the configuration mismatch the controller will need to be replaced with the proper part number for the configuration of the vehicle. Replace and program the TCM in accordance with the Service Information.
- Perform CVT TRANSMISSION VERIFICATION TEST. Refer to Standard Procedure .
- With the scan tool, check the TCM part number and compare it to the vehicle configuration.