P1278

P1278-STARTER CONTROL CIRCUIT 2 HIGH (TIPM)

For complete wiring diagrams refer to Diagrams/Electrical.


- When Monitored:

With the ignition on. Battery voltage greater than 10.4 volts and the ASD sense switch is on.

- Set Condition:

Actual Starter state is not equal to desired state. One Trip Fault. Three good trips to turn off the MIL.







Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.

Diagnostic Test


1. ACTIVE DTC

Ignition on, engine not running.

With a scan tool, select View DTCs.

Is the DTC active at this time?

Yes

- Go To2

No

- Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Intermittent Condition

2. (T750) STARTER CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE





Turn the ignition off.

Disconnect the Starter Solenoid connector.

Disconnect the C9 TIPM harness connector.

Using a 12-volt test light connected to ground, probe (T750) Starter Control Output circuit in the Starter Solenoid harness connector.

Does the test light illuminate brightly?

Yes

- Repair the short to voltage in the (T750) Starter Control Output circuit.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 3

3. STARTER





Turn the ignition off.

Connect the C9 TIPM harness connectors.


NOTE: The Stater Solenoid harness connector must remain disconnected at this time.

Have an assistant turn the ignition key to the CRANK position.

Using a 12-volt test light connected ground, probe the (T750) Stater Control Output circuit in the Starter Solenoid harness connector while the ignition key is in the CRANK position.

Does the test light illuminate brightly?

Yes

- Replace the Starter
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Go To 4

4. TOTALLY INTEGRATED POWER MODULE

NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

Using the schematics as a guide, inspect the wire harness and connectors.

Pay particular attention to all Power and Ground circuits.

Were any problems found?

Yes

- Repair as necessary.
- Perform POWERTRAIN VERIFICATION TEST. Powertrain Verification Test

No

- Replace the Totally Integrated Power Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test