Toyota RAV4 manuals

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

Open or Short Circuit in ABS Motor Relay Circuit

DESCRIPTION

The ABS motor relay supplies power to the ABS pump motor. While the ABS & TRAC & VSC are activated, the ECU switches the ABS motor relay ON and operates the ABS pump motor.

Open or Short Circuit in ABS Motor Relay Circuit

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ABS MOTOR RELAY)

(a) Connect the intelligent tester to the DLC3.

(b) Start the engine.

(c) Select the ACTIVE TEST mode on the intelligent tester.

ABS / VSC:

(d) Check the operation sound of the ABS motor individually when operating it with the intelligent tester.

OK: Operation sound of the ABS motor should be heard.

REPLACE BRAKE ACTUATOR ASSEMBLY

2 INSPECT NO. 5 RELAY BLOCK (POWER SOURCE TERMINAL)

 INSPECT NO. 5 RELAY BLOCK (POWER SOURCE TERMINAL)

(a) Remove the VSC MTR relay from the No. 5 R/B.

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

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

Standard voltage

3 INSPECT ABS MOTOR RELAY (VSC MTR)

INSPECT ABS MOTOR RELAY (VSC MTR)

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

Standard resistance

(b) Apply battery positive voltage between terminals 1 and 2.

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

Standard resistance

4 CHECK HARNESS AND CONNECTOR (ABS MOTOR RELAY - SKID CONTROL ECU)

(a) Check for open or short circuit in harness and connector between the ABS motor relay and skid control ECU.

5 RECONFIRM DTC

(a) Clear the DTCs.

(b) Drive the vehicle at a speed of 6 km/h (4 mph) or more.

(c) Check if the same DTCs are recorded (See page BC- 82).

Result

HINT:

REPLACE BRAKE ACTUATOR ASSEMBLY

6 INSPECT ABS 1 FUSE

(a) Remove the ABS 1 fuse from the FL block.

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

Standard resistance

7 INSPECT ABS MOTOR RELAY (VSC FAIL)

INSPECT ABS MOTOR RELAY (VSC FAIL)

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

Standard resistance

(b) Apply battery positive voltage between terminals 1 and 2.

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

Standard resistance

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPAIR OR REPLACE HARNESS OR CONNECTOR

SFR Solenoid Circuit
DESCRIPTION This solenoid goes on when signals are received from the ECU and controls the pressure acting on the wheel cylinders to control the braking force. WIRING DIAGRAM INSPECTI ...

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 t ...

Other materials:

Summary of the Blind Spot Monitor
The Blind Spot Monitor is a system that has 2 functions: The Blind Spot Monitor function Assists the driver in making the decision when changing lanes The Rear Cross Traffic Alert function Assists the driver when backing up These functions use same sensors. BSM main switch Pre ...

Installation with LATCH system (second seat)
Fold the seatback while pulling the lever and move to the rearmost recline position. Widen the gap between the seat cushion and seatback slightly. Type A Latch the hooks of the lower straps onto the LATCH anchors. If the child restraint has a top tether strap, the ...

Parking Brake Switch Circuit
DESCRIPTION The Multiplex network body ECU receives parking brake switch signal. WIRING DIAGRAM INSPECTION PROCEDURE 1 READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester to DLC3.  Turn the ignition switch ON and push the intelligent tester main switch ON.  Se ...

В© 2011-2026 Copyright www.tsienna.net