Toyota CH-R Service Manual: 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.

*1

DLC3

*a

Front view of wire harness connector

(to ECM)

(b) Disconnect the connector from the ECM.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

F41-13 (TC) - A38-33 (TC)

Always

Below 1 Ω

NG

REPAIR OR REPLACE WIRE HARNESS

OK

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

*1

DLC3

NG

REPAIR OR REPLACE WIRE HARNESS

OK

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

*1

DLC3

OK

REPLACE AIRBAG SENSOR ASSEMBLY

NG

REPAIR OR REPLACE WIRE HARNESS OR REPLACE EACH ECU

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