Circuit/System Testing

Ignition OFF, measure and record the battery voltage at the C1 terminals.
Verify the measured voltage is between 12.0-15.0 V.
- If voltage is less than 12.0 V or greater than 15.0 V
  Refer to Battery Inspection/Test .
- If voltage is between 12.0-15.0 V
Remove the drive belts. Refer to Drive Belt Replacement , for the 2.0L engine or Drive Belt Replacement for the 2.2L or 2.4L engine.
Verify the engine cranks slowly when attempting to start the vehicle.
- If the engine cranks at normal speed
  Inspect the engine and belt drive system for mechanical binding, seized engine, or seized generator.
- If the engine cranks slowly
Verify that a test lamp illuminates between the M64 starter motor B+ terminal 1 X2 and ground.
- If the test lamp does not illuminate
1. Ignition OFF.
2. Test for less than 2 Ω in the B+ circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
- If the test lamp illuminates and the circuit fuse is open
Test for less than 0.5 V between the positive battery cable and terminal 1 X2 at the M64 starter motor with the ignition in the START position.
- If 0.5 V or greater
  Replace the positive battery cable.
- If less than 0.5 V
Test for less than 0.5 V between the negative battery cable and the M64 starter motor case with the ignition in the START position.
- If 0.5 V or greater
  Replace the negative battery cable.
- If less than 0.5 V
Replace the M64 starter motor.