Circuit/System Testing

Ignition OFF, disconnect the X3 harness connector at the X53A fuse block-rear body. Ignition ON
Connect a test lamp between the control circuit terminal 21 and ground.
Verify the test lamp turns ON and OFF when commanding the liftgate latch ON and OFF by pressing the liftgate unlatch switch.
- If the test lamp is always OFF
1. Ignition OFF, disconnect the harness connector at the K9 body control module, ignition ON.
2. Test for infinite resistance between the control circuit and ground.
  - If less than infinite resistance, repair the short to ground on the circuit.
  - If infinite resistance, replace the K9 body control module.
3. Ignition OFF.
4. 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.
  - If less than 2 Ω, replace the K9 body control module.
- If the test lamp is always ON
1. Ignition OFF, disconnect the harness connector at the K9 body control module, ignition ON.
2. 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
Replace the X53A fuse block-rear body.