Electric Parking Brake Auto Switch Light Circuit

PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM: Electric Parking Brake AUTO Switch Light Circuit
- Electric Parking Brake AUTO Switch Light Circuit

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.

HINT
This flowchart is the inspection method for when the AUTO switch light of the electric parking brake continuously illuminates.

PROCEDURE

1. CHECK AUTO SWITCH (DATA LIST)

(a) Turn the power switch OFF.

(b) Connect the Techstream to the DLC3.

(c) Turn the power switch ON (IG) and the Techstream on.

(d) Enter the following menus: Chassis / Electric Parking Brake / Data List.

(e) Check the values by referring to the table below.

Electric Parking Brake





Result





B -- CHECK HARNESS AND CONNECTOR (ECU - SWITCH)
A -- Continue to next step.

2. INSPECT ELECTRIC PARKING BRAKE SWITCH (AUTO 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.

3. CHECK HARNESS AND CONNECTOR (ECU - SWITCH)

(a) Disconnect the S48 ECU connector.

(b) Disconnect the L39 switch connector.

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





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (ECU - SWITCH)

(a) Disconnect the S46 ECU connector.

(b) Disconnect the L39 switch 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