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.

B

REPAIR CIRCUIT INDICATOR BY OUTPUT CODE (CAN COMMUNICATION SYSTEM)

C

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

A

1. 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.

NG

CONNECT CONNECTOR TO ECU CORRECTLY

OK

1. 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

B

INSPECT CHARGING SYSTEM (2GR-FE)

C

INSPECT CHARGING SYSTEM (1AR-FE)

A

1. PERFORM ACTIVE TEST (AWD WARNING LIGHT)

(a) Warm up the engine.

(b) Turn the ignition switch off.

(c) Connect the Techstream to the DLC3.

(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.

OK

REPLACE AWD CONTROL ECU

NG

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

(a) Disconnect the ECU connector.

(b) Turn the ignition switch to ON.

(c) Measure the voltage of the wire harness side connector.

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)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

1. 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)

OK

GO TO METER / GAUGE SYSTEM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR