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

DESCRIPTION

DTC output mode is set by connecting terminals 13 (TC) and 4 (CG) of the DLC3. The DTCs are indicated by the blinking of the tire pressure warning light.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.

    Click here

  • It is necessary to perform initialization after registration of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication system DTC is output.

Click here

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B

B

GO TO CAN COMMUNICATION SYSTEM

A

2.

CHECK DTC (C2179/79)

(a) Check if DTC C2179/79 is output.

Click here

Chassis > Tire Pressure Monitor > Trouble Codes

Result

Proceed to

DTC C2179/79 is not output.

A

DTC C2179/79 is output.

B

B

GO TO DTC C2179/79

A

3.

CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)

(a) Disconnect the A38 ECM connector.

(b) 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

F41-13 (TC) or A38-33 (TC) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (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

*a

Front view of DLC3

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

INSPECT DLC3 TERMINAL VOLTAGE (TC VOLTAGE)

(a) Reconnect the A38 ECM connector.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

F41-13 (TC) - F41-4 (CG)

Ignition switch to ON

11 to 14 V

*a

Front view of DLC3

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE ECM

    Tire Pressure Warning Light Circuit
    DESCRIPTION If the tire pressure warning ECU and receiver detects any problems, the tire pressure warning light blinks (stays on after blinking for 1 minute) and tire pressure monitoring is cance ...

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