P1278-STARTER CONTROL CIRCUIT 2 HIGH (TIPM)
For a complete wiring diagram Refer to Section 8W.
- When Monitored:
With the ignition on. Battery voltage greater than 10.4 volts and the Main Relay on. TIPM requesting Starter operation.
- Set Condition:
Actual Starter state is not equal to desired state. One Trip Fault. Three good trips to turn off the MIL.
| Possible Causes |
| (T750) STARTER CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE |
| STARTER MOTOR |
| TIPM |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - STANDARD PROCEDURE).
Diagnostic Test
1. DTC IS ACTIVENOTE: If P0615, P0616 or P0617 has set along with this DTC, diagnose those DTC(s) first before continuing.
Ignition on, engine not running.
With the scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
- Go To 2
No
- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
2. STARTER CONTROL OUTPUT VERIFICATION
Turn the ignition off.
Disconnect TIPM C10 harness connector.
Turn the ignition on.
Measure the voltage of the (T750) Starter Control Output circuit in the TIPM C10 harness connector.
Is voltage present?
Yes
- Go To 3
No
- Go To 4
3. (T750) STARTER CONTROL OUTPUT CIRCUIT SHORTED TO BATTERY VOLTAGE
Turn the ignition off
Disconnect the Starter (1-way) harness connector.
Turn the ignition on.
Using a voltmeter, measure the voltage of the (T750) Starter Control Output circuit in the TIPM C10 harness connector.
Is voltage present?
Yes
- Repair the short to battery voltage in the (T750) Starter Control Output circuit.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
- Replace the Starter in accordance with the Service information.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
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 the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
- Replace the Totally Integrated Power Module per Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)