C13A1

PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM: C13A1/12: Short in Power Supply Relay Circuit
C13A1/12 - Short in Power Supply Relay Circuit

DESCRIPTION

The electric parking brake ECU performs the lock/release operation of the parking brake based on signals from the electric parking brake switch, or instruction signals from other systems via CAN communication.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
- If the electric parking brake ECU or electric parking brake actuator is replaced, perform the "RESET MEMORY" and "ACQUIRE TENSION SENSOR ZERO POINT" procedures Programming and Relearning.
- Even after the power switch is turned OFF, the electric parking brake ECU may store a DTC as a result of removing a connector or fuse, as the ECU is still operating. Therefore, during inspection or replacement, turn the power switch OFF and wait for 20 seconds before removing the following: 1) connectors of the electric parking brake ECU, and 2) fuses of the electric parking brake system circuit.

PROCEDURE

1. INSPECT ELECTRIC PARKING BRAKE SWITCH

(a) Remove the electric parking brake switch Removal.

(b) Measure the resistance according to the value(s) in the table below.





Standard resistance:





NG -- REPLACE ELECTRIC PARKING BRAKE SWITCH Removal
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (ECU - SWITCH)

(a) Disconnect the L39 switch connector.

(b) Disconnect the S48 ECU connector.

(c) Measure the resistance according to the value(s) in the table below.





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ELECTRIC PARKING BRAKE ECU Removal