Toyota RAV4 manuals

Toyota Sienna Service Manual: Open in ABS Motor Relay Circuit

Open in ABS Motor Relay Circuit

DESCRIPTION

The ABS motor relay supplies power to the ABS pump motor. While the ABS is activated, the ECU turns the motor relay on and operates the ABS pump motor.

If the voltage supplied to the motor relay (+BM) is below the DTCs detection threshold due to low voltage from the battery/alternator, the DTCs may be stored.

Open in ABS Motor Relay Circuit

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT: After steps 1, 2 and 3 are completed, start the inspection from step 4 when using the intelligent tester, and from step 5 when not using the intelligent tester.

1 INSPECT FUSE (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

2 INSPECT SKID CONTROL ECU (+BM TERMINAL VOLTAGE)

 INSPECT SKID CONTROL ECU (+BM TERMINAL VOLTAGE)

(a) Install the ABS 1 fuse.

(b) Disconnect the skid control ECU connector.

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

Standard voltage

3 INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY)

 INSPECT SKID CONTROL ECU (GND TERMINAL CONTINUITY)

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

Standard resistance

4 PERFORM ACTIVE TEST BY INTELLIGENT TESTER (ABS MOTOR RELAY)

(a) Reconnect the skid control ECU connector.

(b) Connect the intelligent tester to the DLC3.

(c) Turn the ignition switch to the ON position and turn the intelligent tester main switch on.

(d) Start the engine.

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

ABS:

(f) Check operating sound of the ABS motor when operating it with the intelligent tester.

OK: The operating sound of the ABS motor is heard.

5 RECONFIRM DTC

(a) Clear the DTCs (See page BC-10).

(b) Start the engine.

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

(d) Check that the same DTCs are recorded (See page BC- 10).

HINT:

Result

HINT:

REPLACE BRAKE ACTUATOR ASSEMBLY

SFR Solenoid Circuit
DESCRIPTION The solenoid comes on when signals are received from the ECU and controls the pressure acting on the wheel cylinders, thus controlling brake force. WIRING DIAGRAM INSPECT ...

Open in ABS Solenoid Relay Circuit
DESCRIPTION This relay supplies power to each ABS solenoid. Immediately after the ignition switch is turned to the ON position, the relay turns on if the solenoid is determined to be normal ...

Other materials:

Power Seat ECU Communication Stop
DTC B1272 Power Seat ECU Communication Stop DESCRIPTION This DTC is detected when communication between the seat position control ECU and the multiplex network gateway ECU stops for more than 10 seconds. DTC No. DTC Detection Condition Trouble Area B1272 ...

Terminals of ECU
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Closing the fuel tank cap
After refueling, turn the fuel tank cap until you hear a click. Once the cap is released, it will turn slightly in the opposite direction. WARNINGWhen replacing the fuel tank cap Do not use anything but a genuine Toyota fuel tank cap designed for your vehicle. Doing so may c ...

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