Circuit/System Testing

Test 1

Ignition/Vehicle - Off
Disconnect the appropriate electrical connector: B28 Door Ajar Switch
Ignition - On / Vehicle - In Service Mode
Verify the scan tool parameter: Door Ajar Switch = Inactive
- If not the specified state
1. Ignition/Vehicle - Off
2. Disconnect the electrical connector.
  - M74D Window Motor - Driver
  - K9 Body Control Module
3. Test for infinite resistance between the test points: Signal circuit terminal 1 @ Component harness & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - If infinite resistance - Replace the component:
- M74D Window Motor - Driver
- 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 1 & Ground
Verify the scan tool parameter: Door Ajar Switch = Active
- If not the specified state
1. Ignition/Vehicle - Off & Remove - Jumper wire(s)
2. Disconnect the electrical connector:
  - M74D Window Motor - Driver
  - 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 1 @ 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:
  - {With AXG} Signal circuit terminal 1 @ B28D Door Ajar Switch - Driver & Signal circuit terminal 6 @ M74D Window Motor - Driver
  - {Without AXG} Signal circuit terminal 1 @ B28D Door Ajar Switch - Driver & Signal circuit terminal 22 X6 @ Control module harness
  - Signal circuit terminal 1 @ B28P Door Ajar Switch - Passenger & Signal circuit terminal 13 X6 @ Control module harness
  - Signal circuit terminal 1 @ B28LR Door Ajar Switch - Left Rear & Signal circuit terminal 27 X6 @ Control module harness
  - Signal circuit terminal 1 @ B28RR Door Ajar Switch - Right Rear & Signal circuit terminal 11 X7 @ Control module harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component:
  - M74D Window Motor - Driver
  - K9 Body Control Module
- Go to next step: If the specified state
Test or replace the component: B28 Door Ajar Switch

Test 2

Ignition/Vehicle - Off
Disconnect the electrical connector: M30 Liftgate 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 2 @ 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 2 & Ground circuit terminal 1
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 2 @ 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 2 @ 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: M30 Liftgate Latch