Circuit/System Testing

NOTE:

It is necessary to clear the DTC after any repair is made to regain park brake output control and have the DTC to set as history.

Ignition OFF, disconnect the harness connector at the M104L Park Brake Actuator - Left and the harness connector at the K17 Electronic Brake Control Module. Ignition ON
Test for less than 1 V between the K17 Electronic Brake Control Module harness connector terminals listed below and ground:
- Terminal 12
- Terminal 13
- If 1 V or greater
  Repair the short to voltage on the circuit.
- Go to next step: If less than 1 V
Ignition OFF.
Test for infinite resistance between the K17 Electronic Brake Control Module harness connector terminals listed below and ground:
- Terminal 12
- Terminal 13
- If less than infinite resistance
  Repair the short to ground on the circuit.
- Go to next step: If infinite resistance
Test for less than 2 Ω between the M104L Park Brake Actuator - Left harness connector terminal 1 and the K17 Electronic Brake Control Module harness connector terminal 13
- If 2 Ω or greater
  Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 Ω
Test for less than 2 Ω between the M104L Park Brake Actuator - Left harness connector terminal 2 and the K17 Electronic Brake Control Module harness connector terminal 12
- If 2 Ω or greater
  Repair the open/high resistance in the circuit.
- Go to next step: If less than 2 Ω
Install a 25 A fused jumper wire between one of the control terminals at the M104L Park Brake Actuator - Left and 12 V. Momentarily install a jumper wire between the other control terminal and ground. Reverse the jumper wires at least two times, the M104L Park Brake Actuator - Left should perform the apply and release function.
- If the actuator does not perform the apply and release function
  Replace the M104L Park Brake Actuator - Left.
- Go to next step: If the actuator performs the apply and release function
Replace the K17 Electronic Brake Control Module.