No Response From TCM (Transmission Control Module) - Diesel

*NO RESPONSE FROM TCM (TRANSMISSION CONTROL MODULE) - DIESEL

For a complete wiring diagram Refer to Diagrams/Electrical.







Diagnostic Test


1. TEST FOR INTERMITTENT CONDITION
Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

With the scan tool, select ECU View.

NOTE: A red X will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.


NOTE: Check the TIPM for any active CAN C hardware DTCs, perform DTC before proceeding.

Does the scan tool display a red X next to the module?

Yes


- Go To 2


No


- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.



2. (A104) FUSED B(+) CIRCUIT OPEN OR SHORTED
Turn the ignition off.
Disconnect the Transmission Control Module C2 harness connector.
Using a 12-volt test light connected to ground, check the (A104) Fused B(+) circuit.
Does the test light illuminate brightly?

Yes


- Go To 3


No


- Repair the (A104) Fused B(+) circuit for an open or short.
- Perform the appropriate VERIFICATION TEST.



3. (Z133) GROUND CIRCUIT OPEN
Using a 12-volt test light connected to 12-volts, check each (Z133) ground circuit.
Does the test light illuminate brightly for each circuit?

Yes


- Go To 4


No


- Repair the (Z133) ground circuit for an open.
- Perform the appropriate VERIFICATION TEST.



4. (D65) CAN C BUS (+) CIRCUIT OPEN
Turn the ignition off.
Disconnect the TIPM C6 harness connector.
Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM connector and the Transmission Control Module C2 connector.
Is resistance below 5.0 ohms?

Yes


- Go To 5


No


- Repair the (D65) CAN C Bus (+) circuit for an open.
- Perform the appropriate VERIFICATION TEST.



5. (D64) CAN C BUS (-) CIRCUIT OPEN
Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM connector and the Transmission Control Module C2 connector.
Is resistance below 5.0 ohms?

Yes


- Replace and program the Transmission Control Module.
- Perform the appropriate VERIFICATION TEST.


No


- Repair the (D64) CAN C Bus (-) circuit for an open.
- Perform the appropriate VERIFICATION TEST.