Circuit/System Testing

Ignition/Vehicle - Off
Disconnect the electrical connector: M31L Liftgate Power Assist Actuator - Left
Verify a test lamp turns On between the test points: Low Reference terminal 6 & B+
- If the test lamp does not turn On
1. Disconnect the electrical connector: X3 @ K194 Rear Gate Module
2. Test for less than 2 ohms between the test points: Low Reference terminal 6 @Component harness & Terminal 6 @Control module harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component: K194 Rear Gate Module
- Go to next step: If the test lamp turns On
Ignition - On/Vehicle - In Service Mode
Test for 4.8 to 5.2 V between the test points: 5 V Reference circuit terminal 4 & Low Reference terminal 6
- If less than 4.8 V
1. Ignition/Vehicle - Off
2. Disconnect the electrical connector: X3 @ K194 Rear Gate Module
3. Test for infinite resistance between the test points: 5 V Reference circuit terminal 4@Component harness & Ground
  - If less than infinite resistance - Repair the short to ground on the circuit.
  - Go to next step: If infinite resistance
4. Test for less than 2 ohms between the test points: 5 V Reference circuit terminal 4@Component harness & Terminal 4 @Control module harness
  - If 2 ohms or greater - Repair the open/high resistance in the circuit.
  - If less than 2 ohms - Replace the component: K194 Rear Gate Module
- If greater than 5.2 V
1. Ignition/Vehicle - Off
2. Disconnect the electrical connector: X3 @ K194 Rear Gate Module
3. Ignition - On/Vehicle - In Service Mode
4. Test for less than 1 V between the test points: 5 V Reference circuit terminal 4@Component harness & Ground
  - If 1 V or greater - Repair the short to voltage on the circuit.
  - If less than 1 V - Replace the component: K194 Rear Gate Module
- Go to next step: If between 4.8 and 5.2 V
Test or replace the component: M31L Liftgate Power Assist Actuator - Left