Toyota Venza: AWD Warning Light Remains ON

Toyota Venza Service Manual / Mf1a Transfer / 4wd / Awd / Active Torque Control 4wd System / AWD Warning Light Remains ON

DESCRIPTION

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

If the AWD control ECU stores any DTCs which are related to the active torque control 4WD system, the AWD warning light comes on in the combination meter.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Check the condition of each related circuit connector before troubleshooting (See page ).

PROCEDURE

1.	CHECK FOR DTC

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

(b) Check if the active torque control 4WD system DTC is output (See page ).

Result	Proceed to
Neither CAN communication system DTC nor active torque control 4WD system DTC is output	A
CAN communication DTC is output	B
Active torque control 4WD system DTC is output	C

HINT:

When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (CAN COMMUNICATION SYSTEM)

REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (ACTIVE TORQUE CONTROL 4WD SYSTEM)

2.	CHECK IF AWD CONTROL ECU CONNECTOR IS SECURELY CONNECTED

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

OK:

The connector is securely connected.

CONNECT CONNECTOR TO ECU CORRECTLY

3.	CHECK BATTERY

(a) Check the battery voltage.

Standard voltage:

11 to 14 V

Result	Proceed to
OK	A
NG (2GR-FE)	B
NG (1AR-FE)	C

INSPECT CHARGING SYSTEM (2GR-FE)

INSPECT CHARGING SYSTEM (1AR-FE)

4.	PERFORM ACTIVE TEST (AWD WARNING LIGHT)

(a) Warm up the engine.

(b) Turn the ignition switch off.

(d) Turn the ignition switch to ON.

(e) Turn the Techstream on.

(f) Enter the following menus: Chassis / 4WD / Active Test.

(g) According to the display on the Techstream, perform the Active Test.

Chassis / 4WD / Active Test

Tester Display	Test Part	Control Range	Diagnostic Note
4WD Warning Light	AWD warning light	Warning light is ON/OFF	Observer combination meter

OK:

The AWD warning light turns off.

REPLACE AWD CONTROL ECU

5.	CHECK WIRE HARNESS OR CONNECTOR (AWD CONTROL ECU - BATTERY)

(a) Disconnect the ECU connector.

(b) Turn the ignition switch to ON.

Standard Voltage:

Tester Connection	Condition	Specified Condition
D38-11 (IG1) - Body Ground	Ignition switch ON	11 to 14 V

Text in Illustration

*1	Rear view of wire harness connector (to AWD Control ECU)

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK WIRE HARNESS OR CONNECTOR (AWD CONTROL ECU - BODY GROUND)

(a) Disconnect the ECU connector.

(b) Measure the resistance of the wire harness side connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D38-23 (GND) - Body Ground	Always	Below 1 Ω

Text in Illustration

*1	Rear view of wire harness connector (to AWD Control ECU)

GO TO METER / GAUGE SYSTEM

REPAIR OR REPLACE HARNESS OR CONNECTOR

AWD Warning Light does not Come ON

DESCRIPTION Refer to "AWD Warning Light Remains ON" (See page ). WIRING DIAGRAM Refer to "AWD Warning Light Remains ON" (See page ). CAUTION / NOTICE / HINT Check the cond ...

TC and CG Terminal Circuit

DESCRIPTION Connecting terminals TC and CG of the DLC3 causes the AWD control ECU to display 2-digit DTCs by flashing the AWD warning light. HINT: When each warning light remains blinking, a shor ...

Other materials about Toyota Venza:

Indicator Circuit
DESCRIPTION The headlight beam level control system indicator light in the combination meter assembly comes on for approximately 3 seconds when the ignition switch is turned to ON. The indicator light also comes on when the headlight leveling ECU assembly ...

Freeze Frame Data
FREEZE FRAME DATA 1. FREEZE FRAME DATA (a) Whenever an ABS DTC is detected, the skid control ECU stores the current vehicle (sensor) state as Freeze Frame Data. (b) The skid control ECU stores the number of times (maximum: 31) the ignition switch has be ...

ECM Power Source Circuit
DESCRIPTION When the ignition switch is turned to ON, the battery voltage is applied to IGSW of the ECM. The output signal from the MREL terminal of the ECM causes a current to flow to the coil, closing the contact of the engine room junction block assemb ...