*NO RESPONSE FROM TIPM (TOTALLY INTEGRATED POWER MODULE)

For a complete wiring diagram Refer to Section 8W.



Possible Causes
FUSED B (+) CIRCUITS OPEN
FUSED IGNITION SWITCH OUTPUT CIRCUITS OPEN
GROUND CIRCUITS OPEN
DIAGNOSTIC CAN C CIRCUITS OPEN
DIAGNOSTIC CAN C CIRCUITS SHORTED TO GROUND
DIAGNOSTIC CAN C CIRCUITS SHORTED TOGETHER
TOTALLY INTEGRATED POWER MODULE



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.


NOTE: Ensure the scan tool is updated to the latest software.


NOTE: If the scan tool displays any error messages involving the Diagnostic CAN C circuits, diagnose and repair the error message before proceeding. Refer to the Table of Contents.


NOTE: A loss of communication with the TIPM can cause the ECU View button on the scan tool to be inoperative (not highlighted).


With the scan tool, attempt to select ECU View.

Can the scan tool communicate with the TIPM?

Yes


No

2. FUSED B (+) CIRCUITS OPEN AT TIPM

Disconnect the scan tool from the DLC.
Using a 12-volt test light connected to ground, and using the wiring diagram as a guide, check all Fused B (+) circuits at the TIPM.

Does the test light illuminate brightly for each circuit?

Yes


No

3. FUSED IGNITION SWITCH OUTPUT CIRCUITS OPEN AT TIPM

Turn the ignition on.
Using a 12-volt test light connected to ground, and using the wiring diagram as a guide, check each Fused Ignition Switch Output circuit at the TIPM.

Does the test light illuminate brightly for each circuit?

Yes


No

4. GROUND CIRCUITS OPEN AT TIPM

Turn the ignition off.
Using a 12-volt test light connected to 12-volts, and using the wiring diagram as a guide, check all ground circuits at the TIPM.

Does the test light illuminate brightly on each circuit?

Yes


No

5. CHECK FOR (D52) DIAGNOSTIC CAN C (+) CIRCUIT OPEN AT DLC



Disconnect the TIPM C7 harness connector.
Measure the resistance on the (D52) Diagnostic CAN C (+) circuit between the TIPM C7 harness connector and the DLC.

Is the resistance above 10.0 ohms?

Yes


No

6. CHECK FOR (D51) DIAGNOSTIC CAN C (-) CIRCUIT OPEN AT DLC



Measure the resistance on the (D51) Diagnostic CAN C (-) circuit between the TIPM C7 harness connector and the DLC.

Is the resistance above 10.0 ohms?

Yes


No

7. CHECK FOR DIAGNOSTIC CAN C CIRCUITS SHORTED TOGETHER



Measure the resistance between the (D52) Diagnostic CAN C (+) circuit and the (D51) Diagnostic CAN C (-) circuit at the TIPM C7 harness connector.

Is the resistance below 100.0 ohms?

Yes


No