Brake Hold Standby Indicator Light Circuit

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: Brake Hold Standby Indicator Light Circuit
- Brake Hold Standby Indicator Light Circuit

DESCRIPTION

When the brake hold switch is turned ON while the engine switch is on (IG), if the brake hold operation is possible, the brake hold standby indicator light illuminates System Description.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration Initialization and Calibration).

HINT
The brake hold standby indicator light comes on when the system is malfunction.

PROCEDURE

1. PRE-CHECK

(a) If the brake hold standby indicator light does not illuminate even though the brake hold switch is pushed, check that the brake hold function operation conditions are met.

(1) The driver's door is closed.

(2) Driver's seat belt is fastened.

(3) The engine hood is closed.

(4) The trunk is closed.

(5) The system is normal.

HINT
If a malfunction occurs in one of the following systems, the brake hold standby indicator light will blink. If this occurs, perform troubleshooting on the malfunctioning system Electronically Controlled Brake System.

* Electronically Controlled Brake system
* ABS system
* VSC system
* Electric parking brake system
* SFI system

NEXT -- Continue to next step.

2. INSPECT CAN COMMUNICATION SYSTEM

(a) Check if the CAN communication system DTC is output CAN Communication System.

Result





B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

3. PERFORM ACTIVE TEST USING TECHSTREAM (BRAKE HOLD OPERATED INDICATOR LIGHT)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Select the Active Test mode on the Techstream.

Combination Meter:





(d) Check that the brake hold operated indicator light turns on or off when using the Techstream.

OK:

The brake hold operated indicator light turns on or off in accordance with the Techstream.

HINT
If troubleshooting has been carried out according to the PROBLEM SYMPTOMS TABLE, refer back to the table and proceed to the next step before replacing the part Problem Symptoms Table.

NG -- GO TO METER AND GAUGE SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.

4. PERFORM ACTIVE TEST USING TECHSTREAM (BRAKE HOLD STANDBY INDICATOR LIGHT)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Select the Active Test mode on the Techstream.

ABS/VSC/TRAC





(d) Check that the brake hold standby indicator light turns on or off on the Techstream.

OK:

The brake hold standby indicator light turns on or off in accordance with the Techstream.

NG -- REPLACE SKID CONTROL ECU Removal
OK -- Continue to next step.

5. READ VALUE USING TECHSTREAM (STEERING PAD SWITCH)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Select the Data List mode on the Techstream.

Steering Pad Switch:





(d) Check that the brake hold switch turns on or off on the Techstream.

OK:

The brake hold switch is operated, and the display changes as shown above.

NG -- REPLACE STEERING PAD SWITCH

OK -- REPLACE SKID CONTROL ECU Removal