P127A-STARTER CONTROL CIRCUIT 2 OVERCURRENT (TIPM)

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the ignition on. Battery voltage greater than 10.4 volts. TIPM requesting Stater operation.
Set Condition:
An overcurrent condition is detected in the Starter control output circuit. One Trip Fault. Three good trips to turn off the MIL.

Possible Causes

TERMINAL DAMAGE OR CORROSION

(T750) STARTER CONTROL OUTPUT CIRCUIT HIGH RESISTANCE

STARTER

TIPM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Diagnostic Test

1.DTC IS ACTIVE

NOTE: If P0615, P0616 or P0617 has set along with this DTC, diagnose those DTC(s) first before continuing.

Is the status Active for this DTC?

Yes

Go To 2

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.VISUAL AND PHYSICAL CONNECTOR AND TERMINAL INSPECTION

NOTE: Ensure the Starter is bolted securely and is properly mounted.

NOTE: Make sure that all in-line connectors are inspected for corrosion and/or damage.

Were any of the above conditions found?

Yes

Repair or replace as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go To 3

3.STARTER CONTROL OUTPUT OPERATION

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.

NOTE: The test light should be illuminated only when cranking the engine. Compare the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly when cranking the engine and then turn off when it is not being cranked?

Yes

Replace the Starter in accordance with the Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Go To 4

4.(T750) STARTER CONTROL OUTPUT CIRCUIT HIGH RESISTANCE

NOTE: The test light should be illuminated and bright. Compared the brightness to that of a direct connection to the battery.

Does the test light illuminate brightly.

Yes

Go To 5

Repair the high resistance in the (T750) Starter Control Output circuit.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE).

5.TOTALLY INTEGRATED POWER MODULE

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

Were any problems found?

Yes

Repair as necessary.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Replace the Totally Integrated Power Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)