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Toyota Sienna Service Manual: Brake Warning Light does not Come ON

WIRING DIAGRAM

See page BC-52.

INSPECTION PROCEDURE

1 INSPECT BRAKE WARNING LIGHT

(a) Disconnect the skid control ECU connector.

(b) Turn the ignition switch to the on position.

(c) Check that the BRAKE warning light comes on.

OK: BRAKE warning light comes on.

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 (See page BC-7).

REPLACE BRAKE ACTUATOR ASSEMBLY

2 CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND COMBINATION METER ASSEMBLY)

(a) Turn the ignition switch off.

(b) Disconnect the combination meter connector.

CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND COMBINATION METER ASSEMBLY)

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

Standard resistance

3 INSPECT COMBINATION METER ASSEMBLY

(a) Check the combination meter assembly (See page ME- 4).

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 (See page BC-7).

END

Brake Warning Light Remains ON
DESCRIPTION If the ECU detects a trouble, it turns on the brake warning light at the same time of prohibiting ABS control. At this time, the ECU records a DTC in memory. Connect terminals TC ...

TC and CG Terminal Circuit
DESCRIPTION DTC output mode is set by connecting terminals TC and CG of the DLC3. The DTCs are displayed by the blinking pattern of the ABS warning light. WIRING DIAGRAM HINT: When warning ...

Other materials:

How to use this manual
GENERAL INFORMATION 1. GENERAL DESCRIPTION (a) This manual is written in accordance with SAE J2008. (b) Repair operations can be separated mainly in the following 3 processes:     (1) Diagnosis             (2) Removing / Install ...

How to proceed with troubleshooting
HINT: The intelligent tester can be used in steps 2, 3, 4, 6 and 9. 1 VEHICLE BROUGHT TO WORKSHOP 2 CONNECT INTELLIGENT TESTER TO DLC3 HINT: If the display indicates a communication fault in the tester, inspect the DLC3. 3 CHECK DTC AND FREEZE FRAME DATA Check for DTC(s) and freeze frame ...

Intermediate Shaft Speed Sensor "A"
DESCRIPTION This sensor detects the rotation speed of the counter gear. By comparing the counter gear speed signal (NC) with the direct clutch speed sensor signal (NT), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according ...

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