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Toyota Sienna Service Manual: Open or Short Circuit in ABS Solenoid Relay Circuit

Open or Short Circuit in ABS Solenoid Relay Circuit

DESCRIPTION

The ABS solenoid relay is built in the brake actuator assembly. This relay supplies power to each ABS solenoid. If the initial check is OK, after the ignition switch is turned to the ON position, the relay goes on.

Open or Short Circuit in ABS Solenoid Relay Circuit

WIRING DIAGRAM

Refer to DTCs C0226/21, C0236/22, C0246/23 and C0256/24 (See page BC-105).

INSPECTION PROCEDURE

1 INSPECT ABS 2 FUSE

(a) Remove the ABS 2 fuse from the FL block.

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

Standard resistance

2 INSPECT SKID CONTROL ECU

(a) Disconnect the skid control ECU connector.

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

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

 INSPECT SKID CONTROL ECU

Standard voltage

3 RECONFIRM DTC

HINT: This code is detected when a problem is determined in the brake actuator assembly.

The ABS solenoid relay is in the brake actuator assembly.

Therefore, solenoid relay circuit inspection relay unit inspection cannot be performed. Be sure to check if the DTC code is output before replacing the brake actuator assembly.

(a) Clear the DTCs (See page BC-82).

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

(c) Are the same DTCs recorded?

Result

NOTICE: When replacing brake actuator assembly, perform zero point calibration (See page BC-70).

REPLACE BRAKE ACTUATOR ASSEMBLY

4 INSPECT SKID CONTROL ECU (GND TERMINAL)

(a) Disconnect the skid control ECU connector.

INSPECT SKID CONTROL ECU (GND TERMINAL)

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

Standard resistance

5 RECONFIRM DTC

HINT: This code is detected when a problem is determined in the brake actuator assembly.

The ABS solenoid relay is in the brake actuator assembly.

Therefore, solenoid relay circuit inspection relay unit inspection cannot be performed. Be sure to check if the DTC code is output before replacing the brake actuator assembly.

(a) Clear the DTCs (See page BC-82).

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

(c) Are the same DTCs recorded?

Result

HINT: It is suspected that the DTCs output was caused by the poor connection of the connector terminal.

NOTICE: When replacing brake actuator assembly, perform zero point calibration (See page BC-70).

REPLACE BRAKE ACTUATOR ASSEMBLY

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