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@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
- Go to next step: 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@Component harness & Ground
  - If 1 V or greater - Repair the short to voltage on the circuit.
  - Go to next step: If less than 1 V
5. Ignition/Vehicle - Off
6. Test for less than 2 ohms between the test points:Signal circuit terminal 4@Component harness & Terminal 5 X6@Control module harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component:K9 Body Control Module
- Go to next step: If the specified state
Test or replace the component:M40 Rear Compartment Lid Latch