No Response From TIPM (Totally Integrated Power Module)

NO RESPONSE FROM TIPM (TOTALLY INTEGRATED POWER MODULE)

For a complete wiring diagram, refer to the Wiring Information.






1. TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.

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

NOTE: Make sure 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.

2. With the scan tool, attempt to communicate with the TIPM.

Does the scan tool communicate with the TIPM?

Yes

- 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.

No

- Go To 2

2. FUSED B(+) CIRCUITS OPEN AT TIPM
1. Disconnect the scan tool from the DLC.
2. 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

- Go To 3

No

- Repair the open or short in the Fused B(+) circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. FUSED IGNITION SWITCH OUTPUT CIRCUITS OPEN AT TIPM
1. Turn the ignition on.
2. 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

- Go To 4

No

- Repair the open in the Fused Ignition Switch Output circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. GROUND CIRCUITS OPEN AT TIPM
1. Turn the ignition off.
2. 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

- Go To 5

No

- Repair the open in the ground circuit that did not light the test light.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. CHECK THE (D72) DIAGNOSTIC CAN C (+) CIRCUIT FOR AN OPEN




1. Disconnect the TIPM C7 harness connector.
2. Measure the resistance of the (D72) Diagnostic CAN C (+) circuit between the TIPM C7 harness connector and the DLC.

Is the resistance below 5.0 Ohms?

Yes

- Go To 6

No

- Repair the open in the (D72) Diagnostic CAN C (+) circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

6. CHECK THE (D71) DIAGNOSTIC CAN C (-) CIRCUIT FOR AN OPEN




1. Measure the resistance of the (D71) Diagnostic CAN C (-) circuit between the TIPM C7 harness connector and the DLC.

Is the resistance below 5.0 Ohms?

Yes

- Go To 7

No

- Repair the open in the (D71) Diagnostic CAN C (-) circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

7. CHECK THE DIAGNOSTIC CAN C CIRCUITS FOR A SHORT TOGETHER




1. Measure the resistance between the (D72) Diagnostic CAN C (+) circuit and the (D71) Diagnostic CAN C (-) circuit at the TIPM C7 harness connector.

Is the resistance above 10k Ohms?

Yes

- Replace the Totally Integrated Power Module. Totally Integrated Power Module (TIPM) - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the short between the (D72) Diagnostic CAN C (+) circuit and the (D71) Diagnostic CAN C (-) circuit.
- Perform the BODY VERIFICATION TEST. Body Verification Test.