TC and CG Terminal Circuit

DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the system to enter self-diagnostic mode. If a malfunction is present, the MIL will blink.

HINT:

When a particular warning light remains blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in the relevant ECU is suspected.

WIRING DIAGRAM
PROCEDURE

1. CHECK HARNESS AND CONNECTOR (DLC3 - ECM)

(a) Disconnect the ECM connector.

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

Standard Resistance:

For 1AR-FE

Tester Connection	Condition	Specified Condition
D1-13 (TC) - A49-7 (TC)	Always	Below 1 Ω

For 2GR-FE

Tester Connection	Condition	Specified Condition
D1-13 (TC) - A41-16 (TC)	Always	Below 1 Ω

Text in Illustration

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

(c) Reconnect the ECM connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - ECM)

OK

1. CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)

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

Standard Resistance:

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

Text in Illustration

*1

DLC3

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (DLC3 - BODY GROUND)

OK

1. CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D1-13 (TC) - Body ground	Always	10 kΩ or higher

Text in Illustration

*1

DLC3

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU