*ENGINE WILL NOT CRANK

For a complete wiring diagram Refer to Section 8W

Possible Causes

BATTERY CABLES

LOW BATTERY/POOR BATTERY CONNECTION

CLUTCH INTERLOCK SWITCH INPUT

MECHANICAL PROBLEM

SKIM CODES PRESENT

STARTER MOTOR

TOTALLY INTEGRATED POWER MODULE

(T750) STARTER CONTROL OUTPUT CIRCUIT SHORT TO GROUND

(T750) STARTER CONTROL OUTPUT CIRCUIT OPEN

Diagnostic Test

1.BATTERY CABLES

NOTE: Ensure there are no Active DTC's in the ECM or TIPM. If the ECM or TIPM have Active DTC's, repair these DTC's before continuing with No Crank diagnosis.

NOTE: The battery must be fully charged before diagnosing a no crank condition.

Is there evidence of problems?

Yes

Repair as necessary.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Go To 2

2.ECM POWER AND GROUND CIRCUITS

Are the Ignition, Battery and Ground supply circuits functioning properly at the ECM?

Yes

Go To 3
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Repair as necessary.

3.SKIM CODES PRESENT

Does the scan tool display any SKIM DTCs?

Yes

Refer to symptom list for problems related to SKIM.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Go To 4

4.CHECKING STARTER OPERATION

NOTE: The Starter Motor Fuse in the TIPM must not be open for this test to be valid. Check the condition of the Starter Motor Fuse in the TIPM. If the fuse is open, replace and attempt to crank the engine.

Is the test light illuminated brightly?

Yes

Go To 5

Go To 6

5.MECHANICAL PROBLEM

Is the crankshaft able to rotate 360°?

Yes

Replace the Starter Motor.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Repair the engine mechanical problem.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

6.VERIFY CLUTCH SWITCH INPUTS

Does the input for both switched change state while fully depressing and releasing the clutch pedal?

Yes

Go To 7

Refer to the Service Information related to the Clutch Switch. Repair or replace Clutch Switch or Clutch Switch circuitry as necessary to correct Clutch Switch input to the ECM.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

7.(T750) STARTER CONTROL OUTPUT CIRCUIT OPEN

Does the test light illuminate brightly?

Yes

Go To 8

Repair the (T750) Starter Relay Output circuit for an open.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

8.(T750) STARTER CONTROL OUTPUT CIRCUIT SHORT TO GROUND

Is the resistance above 1000 ohms?

Yes

Go To 9

Repair the (T750) Starter Control Output circuit for a short to ground.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

9.CHECK WIRING, CONNECTORS AND TERMINALS

Were any problems found?

Yes

Repair or replace wiring, connector or terminals as necessary.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Replace the TIPM in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).