GENERAL DESCRIPTION

The brake lamp switch is a normal-open(NO) type, and the brake switch is a normal-close(NC) type.

DTC DESCRIPTION

This code shows in case that there is an open or short in the circuit of the brake switch, or an error on the brake switch.

DTC DETECTING CONDITION

DTC No.

Detecting Condition

Possible Cause

C1513

If both brake lamp switch and brake switch have a same state for predetermined time, the failure is recognized.

-

Brake switch Open, short to GND

-

Faulty brake switch

-

Faulty HECU

FAILSAFE FUNCTION

The ESP function is inhibited, while the ABS and EBD controls allowed.

The ESP warning lamp is ON, but the ABS and EBD warning lamps OFF.

INSPECTION PROCEDURE
1.

CHECK OPEN/SHORT IN CIRCUIT OF BRAKE SWITCH

(1)

Disconnect the connector from the HECU, and measure the voltage between terminal 21 of the HECU connector and the body ground, not pushing the brake pedal.

Specification : Battery (B+)

(2)

Disconnect the connector from the HECU, and measure the voltage between terminal 21 of the HECU connector and the body ground, pushing the brake pedal.

Specification : 0V

Is the voltage within the specification?

▶ Repair harness and connector of the brake switch.

▶ Check open/short in circuit of brake lamp switch

2.

CHECK OPEN/SHORT IN CIRCUIT OF BRAKE LAMP SWITCH

(1)

Disconnect the connector from the HECU, and measure the voltage between terminal 5 of the HECU connector and the body ground, not pushing the brake pedal.

Specification : 0V

(2)

Disconnect the connector from the HECU, and measure the voltage between terminal 21 of the HECU connector and the body ground, pushing the brake pedal.

Specification : Battery (B+)

Is the voltage within the specification?

▶ Repair harness and connector of the brake lamp switch.

▶ After clearing the DTC and driving the vehicle at 40Km/h speed or more, if the ESP lamp is ON and the same DTC shows again, replace the HECU and recheck.

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