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

Toyota CH-R Service Manual / Tire Pressure Monitoring / Tire Pressure Warning System / 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.
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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.

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Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK DTC (C2179/79)

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

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Chassis > Tire Pressure Monitor > Trouble Codes

Result	Proceed to
DTC C2179/79 is not output.	A
DTC C2179/79 is output.	B

GO TO DTC C2179/79

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

REPLACE ECM

Tire Pressure Warning Light Circuit

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