P0602

(P0602) PCM PROGRAMMED INCORRECT TRANS/NO COMM FROM TCM





When Monitored and Set Condition
^ When Monitored: With the ignition on.
^ Set Condition: This DTC is set when a CAN ID is not received in the required time from the Transmission Control Module (TCM).

POSSIBLE CAUSES CAN
- C BUS CIRCUIT OPEN
- CAN C BUS CIRCUIT SHORT TO GROUND
- CAN C BUS CIRCUIT SHORT TO VOLTAGE
- TRANSMISSION CONTROL MODULE
- SENTRY KEY REMOTE ENTRY MODULE
- POWERTRAIN CONTROL MODULE


Diagnostic Test
1. CHECK FOR CURRENT DTC





Turn the ignition on. With the DRBIII, read PCM DTCs.
Is this DTC present?
Yes >> For complete diagnosis of this DTC, refer to (P0600) NO TRANSMISSION BUS MESSAGE. No Transmission Bus Message
No >> Go To 2

2. INTERMITTENT WIRING AND CONNECTORS
The conditions necessary to set this DTC are not present at this time.

Note: Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors specific to this DTC. Wiggle the wires while checking for shorts and open circuits.

Note: Check for any Technical Service Bulletins that may apply.

Were there any problems found?
Yes >> Repair as necessary. Perform POWERTRAIN VERIFICATION TEST - VER 2 Powertrain Verification Test - Ver 2.
No >> The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition.