Toyota Venza manuals

Toyota Venza: ABS Warning Light Remains ON

DESCRIPTION

The skid control ECU is connected to the combination meter via CAN communication.

If any of the following is detected, the ABS warning light remains on:

  • The skid control ECU connector is disconnected from the skid control ECU.
  • There is a malfunction in the skid control ECU internal circuit.
  • There is an open in the harness between the combination meter and the skid control ECU.
  • The ABS control system is defective.

HINT:

In some cases, the Techstream cannot be used when the skid control ECU is abnormal.

WIRING DIAGRAM


PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication system DTC is output (See page ).


Result

Proceed to

DTC is not output

A

DTC is output

B


B

INSPECT CAN COMMUNICATION SYSTEM


A

2.

CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

(a) Check if the skid control ECU connector is securely connected.

OK:

The connector is securely connected.


NG

CONNECT CONNECTOR TO ECU CORRECTLY


OK

3.

CHECK BATTERY

(a) Check the battery voltage.

Standard Voltage:

11 to 14 V

Result

Proceed to

OK

A

NG (for 2GR-FE)

B

NG (for 1AR-FE)

C


B

CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 2GR-FE)


C

CHECK OR REPLACE CHARGING SYSTEM OR BATTERY (for 1AR-FE)


A

4.

INSPECT SKID CONTROL ECU (IG1 TERMINAL)

(a) Disconnect the skid control ECU connector.


(b) Turn the ignition switch to ON.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

A42-28 (IG1) - Body ground

Ignition switch ON

11 to 14 V

Text in Illustration

*1

Front view of wire harness connector

(to Brake Actuator (Skid Control ECU))


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)


OK

5.

INSPECT SKID CONTROL ECU (GND1 TERMINAL)

(a) Turn the ignition switch off.


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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A42-4 (GND1) - Body ground

Always

Below 1 Ω

Text in Illustration

*1

Front view of wire harness connector

(to Brake Actuator (Skid Control ECU))


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GND1 CIRCUIT)


OK

6.

INSPECT COMBINATION METER ASSEMBLY

(a) Reconnect the skid control ECU connector.

(b) Perform the Active Test of the combination meter (meter CPU) using the Techstream (See page ).


(c) Check the combination meter.

OK:

The ABS warning light turns on or off in accordance with the Techstream operation.

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (See page ).



OK

REPLACE BRAKE ACTUATOR ASSEMBLY


NG

REPLACE COMBINATION METER ASSEMBLY

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