C13A3

PARKING BRAKE: ELECTRIC PARKING BRAKE SYSTEM: C13A3/31, C13AB/33: Open or Short in Lock Switch Circuit


DESCRIPTION

When electric parking brake switch is pushed to the lock side, a lock request signal is output to parking brake ECU.





HINT
*: When battery voltage is 11 V

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.
- Before disconnecting connectors or fuses, turn the engine switch off and wait 20 seconds or more.
- The electric parking brake switch interior's linked double contacts may become unlinked (one is off, one is on) if the switch is halfway pushed/pulled. If this condition continues for 1 second or more, this DTC is output.

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 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.

3. CLEAR DTC

(a) Turn the engine switch off.

(b) Securely install the parking brake ECU connectors and electric parking brake switch.

(c) Connect the Techstream to the DLC3.

(d) Turn the engine switch on (IG) and the Techstream on.

(e) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

4. CHECK FOR DTC

(a) Turn the engine switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the engine switch on (IG) and the Techstream on.

(d) Perform the electric parking brake switch lock control.

(e) Check for DTC.

Result:





B -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

A -- REPLACE ELECTRIC PARKING BRAKE ECU Removal