Toyota Sienna Service Manual: Open in ABS Solenoid Relay Circuit

Toyota Sienna Service Manual / Brake control / Anti-lock brake system / Diagnostic trouble code chart / Open in ABS Solenoid Relay Circuit

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 as a result of self-diagnosis during initial check.

The relay turns off if an open/short is detected.

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

Open in ABS Solenoid Relay Circuit

WIRING DIAGRAM

Refer to DTCs C0226/21, C0236/22, C0246/23 and C0256/24 (See page BC-29).

INSPECTION PROCEDURE

1 INSPECT FUSE (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 (+BS TERMINAL VOLTAGE)

INSPECT SKID CONTROL ECU (+BS TERMINAL VOLTAGE)

(a) Install the ABS 2 fuse.

(b) Disconnect the skid control ECU connector.

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 RECONFIRM DTC

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

(b) Start the engine.

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

HINT:

Reinstall the sensors, connectors, etc. and restore the vehicle to its prior condition before rechecking for DTCs.
If a speed signal of 6 km/h (4 mph) or more is input to the skid control ECU, with the ignition switch on and the stop light switch off, the ECU performs selfdiagnosis of the motor and solenoid circuits.

Result

HINT:

If any DTCs are output while jiggling a connector or wire harness of the brake actuator (skid control ECU), inspect and repair the connector or wire harness.
If the normal system code is output, slightly jiggle the connectors, wire harnesses, and fuses of the brake actuator assembly. Make sure that no DTCs are output.
These DTCs may be memorized due to a malfunction in the connector terminal connection, etc.

REPLACE BRAKE ACTUATOR ASSEMBLY

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 t ...

Low Battery Positive Voltage

DTC C1241/41 Low Battery Positive Voltage DESCRIPTION If there is a problem with the brake actuator assembly (skid control ECU) power supply circuit, the skid control ECU outputs the DTC and proh ...

Other materials:

Customer problem analysis
HINT: In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem an ...

Removal
1. DISCHARGE FUEL SYSTEM PRESSURE HINT: See page FU-1. 2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 3. REMOVE NO. 1 ENGINE UNDER COVER 4. DRAIN ENGINE COOLANT (See page CO-6) 5. REMOVE FRONT WIPER ARM HEAD CAP (See page WW-4) 6. REMOVE FRONT WIPER ARM RH (See page WW-4) 7. REMOVE FRO ...

Rear side sunshades
Rear door window Rear quarter window Pull the tab up. Secure the sunshade using the hooks. To retract the sunshade, pull the tab up slightly to unhook the sunshade, and lower the sunshade slowly. NOTICE To ensure normal operation of the rear sunshades, observe ...