Toyota 4Runner: TC and CG Terminal Circuit

Toyota 4Runner Service Manual / Suspension / 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 output by the blinking of the tire pressure warning light.

WIRING DIAGRAM

HINT:

When each warning light blinks continuously, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU is suspected.

CAUTION / NOTICE / HINT

NOTICE:

When replacing the tire pressure warning ECU, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.
It is necessary to perform registration of the transmitter IDs into the tire pressure warning ECU after the ECU and/or the tire pressure warning valve and transmitter has been replaced (See page ).

PROCEDURE

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

(a) Disconnect the F7 ECU connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F7-3 (TC) - F13-13 (TC)	Always	Below 1 Ω
F7-3 (TC) - Body ground	Always	10 kΩ or higher
F13-4 (CG) - Body ground	Always	Below 1 Ω

CHECK ECU POWER SOURCE CIRCUIT

REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU

ECU Power Source Circuit

DESCRIPTION This is the power source for the tire pressure warning ECU. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the tire pressure warning ECU, read the IDs stored ...

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Toyota 4Runner: TC and CG Terminal Circuit

ECU Power Source Circuit

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