Circuit/System Testing

Manual Transmission (without Clutch Pedal Position Switch)

1. Disconnect the harness connector at the ignition switch.
2. Verify that a test lamp illuminates between the ignition switch B+ circuit terminal 2 and ground.
   • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the fuse is open, test the ignition switch output terminal 3 for a short to ground.
3. Ensure the parking brake is applied and the transmission is in Neutral.
4. Momentarily install a 30 A fused jumper wire between the ignition switch B+ circuit terminal 2 and the ignition switch output circuit terminal 3. The starter solenoid should engage and the engine should begin cranking.
   • If the solenoid does not engage, test the ignition switch output circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the starter motor.
5. If all circuits test normal, replace the ignition switch.

Manual Transmission (with Clutch Pedal Position Switch)

1. Disconnect the harness connector at the ignition switch.
2. Verify that a test lamp illuminates between the ignition switch B+ circuit terminal 2 and ground.
   • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the fuse is open, test the ignition switch output terminal 3 for a short to ground.
3. Connect the harness connector at the ignition switch.
4. Connect a test lamp between the ignition switch output terminal 3 and ground.
5. Transmission in neutral and clutch pedal depressed, cycle the ignition between the OFF and Crank position. The test lamp should turn ON and OFF when changing between the Crank and OFF positions.
   • If the test lamp is always ON, test the ignition switch output circuit for a short to voltage. If the circuit tests normal, replace the ignition switch.
   • If the test lamp is always OFF, test the ignition switch output circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ignition switch.
6. Connect a test lamp between the clutch start switch output terminal 3 and ground.
7. Transmission in neutral and clutch pedal depressed, cycle the ignition between the OFF and Crank position. The test lamp should turn ON and OFF when changing between the Crank and OFF positions.
   • If the test lamp is always ON, test the clutch start switch output circuit for a short to voltage. If the circuit tests normal, adjust or replace the clutch pedal position sensor, refer to Clutch Pedal Position Sensor Replacement .
   • If the test lamp is always OFF, test the clutch start switch output circuit for a short to ground or an open/high resistance. If the circuit tests normal, adjust or replace the clutch pedal position sensor, refer to Clutch Pedal Position Sensor Replacement .
8. If all circuits test normal, replace the starter motor.

Automatic Transmission

1. Verify DTC P0851, P0852, B1370, B1380, B1440, or B1441 are not set.
   • If either DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
2. Ignition Off, disconnect the starter relay.
3. Test for less than 10 Ω between the relay ground coil terminal 86 and ground.
   • If greater than the specified range, test the ground circuit for an open/high resistance.
4. Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 30 and ground.
   • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the fuse is open, test the relay switch control output terminal 87 for a short to ground.
5. Ensure the parking brake is applied and the transmission is in park/neutral.
6. Momentarily install a 30 A fused jumper wire between the B+ circuit terminal 30 and the relay switch output terminal 87.
7. The starter solenoid should engage and the engine should begin cranking
   • If the solenoid does not engage, test the relay switch output circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the starter motor.
8. Connect a test lamp between the starter relay coil control circuit terminal 85 and the coil ground terminal 86.
9. Transmission in park/neutral, cycle the ignition between the OFF and Crank position. The test lamp should turn ON and OFF when changing between the Crank and OFF positions.
   • If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.
   • If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
10. If all circuits tests normal, replace the starter relay.