Pinpoint Test G295394p3: DTC C1989; Park Brake Apply and Release Switch Contacts Energized Simultaneously

PINPOINT TEST G295394p3: DTC C1989; PARK BRAKE APPLY AND RELEASE SWITCH CONTACTS ENERGIZED SIMULTANEOUSLY

G295394t8: CHECK PARK BRAKE APPLY SWITCH FUNCTION
1. Disconnect the EPB switchpack electrical connector, TL82.
2. Connect an ohmmeter between pins 06 and 08 of the switch.
3. Operate the switch to the Apply position.

^ Does the ohmmeter switch between open and closed circuit as the switch is operated?

-> Yes GO to Pinpoint Test G295394t9.

-> No INSTALL a new switchpack. Parking Brake Switch (70.35.46) CLEAR the DTC. TEST the system for normal operation.

G295394t9: CHECK PARK BRAKE RELEASE SWITCH FUNCTION
1. Connect an ohmmeter between pins 04 and 06 of the switch.
2. Operate the switch to the Release position.

^ Does the ohmmeter switch between open and closed circuit as the switch is operated?

-> Yes GO to Pinpoint Test G295394t10.

-> No INSTALL a new switchpack. CLEAR the DTC. TEST the system for normal operation.

G295394t10: CHECK THE PARK BRAKE SWITCH FOR SHORT CIRCUIT
1. Connect an ohmmeter between pins 04 and 08 of the switch.

^ Is the resistance less than 10,000 ohms?

-> Yes INSTALL a new switchpack. CLEAR the DTC. TEST the system for normal operation.

-> No Recheck DTCs. Contact dealer technical support for advice on possible EPB control module failure.