Circuit/System Testing

Ignition/Vehicle » Off
Disconnect the electrical connector: M40 Rear Compartment Lid Latch
Ignition » On / Vehicle » In Service Mode
Verify the scan tool parameter: Rear Closure Ajar Switch = Inactive
- If not the specified state
1. Ignition/Vehicle » Off
2. Disconnect the electrical connector: K9 Body Control Module
3. Test for infinite resistance between the test points: Signal circuit terminal 4 at Component harness & Ground
  - If less than infinite resistance » Repair the short to ground on the circuit.
  - If infinite resistance » Replace the component: K9 Body Control Module
- If the specified state
Connect a 3 A fused jumper wire between the test points: Signal circuit terminal 4 & Ground circuit terminal 2
Verify the scan tool parameter: Rear Closure Ajar Switch = Active
- If not the specified state
1. Ignition/Vehicle » Off & Remove » Jumper wire(s)
2. Disconnect the electrical connector: K9 Body Control Module
3. Ignition » On / Vehicle » In Service Mode
4. Test for less than 1 V between the test points: Signal circuit terminal 4 at Component harness & Ground
  - If 1 V or greater » Repair the short to voltage on the circuit.
  - If less than 1 V
5. Ignition/Vehicle » Off
6. Test for less than 2 Ω between the test points: Signal circuit terminal 4 at Component harness & Terminal 5 X6 at Control module harness
  - If 2 Ω or greater » Repair the open/high resistance in the circuit.
  - If less than 2 Ω » Replace the component: K9 Body Control Module
- If the specified state
Test or replace the component: M40 Rear Compartment Lid Latch