Circuit/System Testing
- Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the M7 Transmission Shift Lock Control Solenoid Actuator. It may take up to 2 min for all vehicle systems to power down.
- Test for less than 10 Ω between the ground circuit terminal B and ground.
- Ignition OFF.
- Test for less than 2 Ω in the ground circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- If less than 2 Ω, repair the open/high resistance in the ground connection.
- Install a test lamp between the control circuit terminal A and the ground circuit terminal B, ignition ON.
- Verify the test lamp turns ON and OFF when commanding the Brake Transmission Shift Interlock Solenoid Actuator Command parameter with the scan tool.
- If test lamp is always OFF
- Ignition OFF, disconnect the harness connector at the K9 Body Control Module.
- Test for infinite resistance between the control circuit and ground.
- If less than infinite resistance, repair the short to ground on the circuit.
- Test for less than 2 Ω in the control circuit end to end.
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- Ignition ON.
- Verify a test lamp illuminates between each B+ and ignition circuit terminal at the control module harness connector.
- If the test lamp does not illuminate, repair the circuit or fuse as necessary.
- If the test lamp does illuminates at each B+ and ignition circuit, replace the K9 Body Control Module.
- If test lamp is always ON
- Ignition OFF, disconnect the harness connector at K9 Body Control Module, ignition on.
- Test for less than 1 V between the control circuit and ground.
- If 1 V or greater, repair the short to voltage on the circuit.
- If less than 1 V, replace the K9 Body Control Module.
- If the test lamp turns ON and OFF
- Test or replace the M7 Transmission Shift Lock Control Solenoid Actuator.