Circuit/System Testing

NOTE:

Use the schematic to determine which devices are on the K9 Body Control Module's ignition circuit terminal 22 X4. Use the connector end view to identify the ignition circuit terminal for each of those devices.

Ignition OFF, disconnect the harness connectors at an easily accessible device that shares the K9 Body Control Module's ignition circuit terminal 22 X4. Ignition ON.
Verify that the DTC U1814 remains current.
- If the DTC becomes history
  Replace the device that was just disconnected.
- Go to next step: If the DTC remains current
With the prior devices disconnected, repeat steps 1 and 2 for each device on the ignition circuit except the K9 Body Control Module.
Ignition OFF, disconnect the X4 harness connector at the K9 Body Control Module.
Test for infinite resistance between the ignition circuit terminal 22 X4 at the K9 Body Control Module and ground.
- If less than infinite resistance
  Repair the short to ground on the circuit.
- Go to next step: If infinite resistance
Replace the K9 Body Control Module.