Toyota Venza: TC and CG Terminal Circuit

Toyota Venza Service Manual / Mf1a Transfer / 4wd / Awd / Active Torque Control 4wd System / 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 short to ground in the wiring of terminal TC of the DLC3 or an internal short to ground in each ECU is suspected.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

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

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

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

Result	Proceed to
DTC is not output	A
DTC is output	B

REPAIR CAN COMMUNICATION SYSTEM

2.	CHECK WIRE HARNESS (TC OF DLC3 - TC OF ECM AND BODY GROUND)

(a) Turn the ignition switch off.

(b) Disconnect the ECM connector.

Standard Resistance:

Tester Connection (DLC3 - ECM)	Condition	Specified Condition
D1-13 (TC) - A41-16 (TC)	Always	Below 1 Ω
D1-13 (TC) - A49-7 (TC)	Always	Below 1 Ω
D1-13 (TC) - Body Ground	Always	10 kΩ or higher

Tester Connection

(DLC3 - ECM)

Condition

Specified Condition

D1-13 (TC) - A41-16 (TC)

Always

Below 1 Ω

D1-13 (TC) - A49-7 (TC)

Always

Below 1 Ω

D1-13 (TC) - Body Ground

Always

10 kΩ or higher

Text in Illustration

*1	DLC3
*2	Front view of wire harness connector (to ECM)
*3	2GR-FE
*4	1AR-FE

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK WIRE HARNESS (CG OF DLC3 - BODY GROUND)

(a) Measure the resistance of the DLC3.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D1-4 (CG) - Body ground	Always	Below 1 Ω

Text in Illustration

DLC3

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK WIRE HARNESS (TC OF DLC3 - BODY GROUND)

(a) Measure the resistance of the DLC3.

Standard Resistance:

Tester Connection	Condition	Specified Condition
D1-13 (TC) - Body ground	Always	Below 1 Ω

Text in Illustration

DLC3

REPLACE AWD CONTROL ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

AWD Warning Light Remains ON

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