P1279-STARTER CONTROL CIRCUIT 2 OPEN (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 OPEN |
| STARTER |
| 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 OPERATION
Turn the ignition off.
Disconnect the Starter (1-way) harness connector.
With a 12-volt test light connected to ground, probe the (T750) Starter Control Output circuit in the Starter (1-way) harness connector
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.
Crank the engine and monitor the test light.
NOTE: The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.
Does the test light illuminate brightly?
Yes
- Replace the Starter in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
- Go To 3
3. (T750) STARTER CONTROL OUTPUT CIRCUIT OPEN
Turn the ignition off
Disconnect the TIPM 10 harness connector.
Measure the resistance of the (T750) Starter Control Output circuit between the TIPM C10 harness connector and the Starter harness connector.
Is the resistance below 5.0 ohms?
Yes
- Go To 4
No
- Repair the short to ground in the (T750) Starter Control Output circuit.
- 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 in accordance with the Service Information.
- Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)