Toyota CH-R Service Manual: TC and CG Terminal Circuit

Toyota CH-R Service Manual / Supplemental Restraint Systems / Airbag System / TC and CG Terminal Circuit

DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3.

DTCs are displayed by blinking of the SRS warning light.

HINT:

When multiple warning lights in the combination meter blink continuously, a short to ground in the wiring or an ECU connected to terminal TC of the DLC3 is suspected.
A DTC output mode signal is transmitted via CAN communication to each ECU including the airbag sensor assembly. Thus when multiple systems do not enter DTC output mode, there may be a malfunction in the ECM.

WIRING DIAGRAM

PROCEDURE

1.	CHECK WIRE HARNESS (TC OF DLC3 - TC OF ECM)

(a) Turn the ignition switch off.

DLC3

Front view of wire harness connector

(to ECM)

(b) Disconnect the connector from the ECM.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F41-13 (TC) - A38-33 (TC)	Always	Below 1 Ω

REPAIR OR REPLACE WIRE HARNESS

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F41-4 (CG) - Body ground	Always	Below 1 Ω

DLC3

REPAIR OR REPLACE WIRE HARNESS

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F41-13 (TC) - Body ground	Always	1 MΩ or higher

DLC3

REPLACE AIRBAG SENSOR ASSEMBLY

REPAIR OR REPLACE WIRE HARNESS OR REPLACE EACH ECU

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