Toyota Venza: Tire Pressure Warning Light Circuit

Toyota Venza Service Manual / Tire Pressure Monitoring / Tire Pressure Warning System / Tire Pressure Warning Light Circuit

DESCRIPTION

If the tire pressure warning ECU detects a malfunction, the tire pressure warning light blinks for 1 minute then stays on and tire pressure monitor is canceled at the same time. At this time, the ECU records a DTC in the memory.

Connecting terminals TC and CG of the DLC3 allows the tire pressure warning light to blink output DTCs.

WIRING DIAGRAM

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 (See page ) of the transmitter IDs into the tire
pressure warning ECU if the ECU has been replaced.

PROCEDURE

1.	CHECK OPERATION OF TIRE PRESSURE WARNING LIGHT (ACTIVE TEST)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(f) Check the condition of the tire pressure warning light by operating the Techstream.

Combination Meter

Tester Display	Test Part	Control Range	Diagnostic Note
Indicat. Tire Pressure Warning System	Tire pressure warning light	Tire pressure warning light is off or on	Confirm that the vehicle is stopped with the engine idling

OK:

The warning light turns on when operating the Techstream.

GO TO METER / GAUGE SYSTEM

2.	CHECK HARNESS AND CONNECTOR (COMBINATION METER - TIRE PRESSURE WARNING ECU)

(a) Disconnect the E2 combination meter connector.

(b) Disconnect the D31 tire pressure warning ECU connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E2-21 (TIRE) - D31-5 (IND)	Always	Below 1 Ω
E2-21 (TIRE) - Body ground	Always	10 kΩ or higher

Text in Illustration

Front view of wire harness connector

(to Tire Pressure Warning ECU)

Front view of wire harness connector

(to Combination Meter)

REPLACE TIRE PRESSURE WARNING ECU

REPAIR OR REPLACE HARNESS OR CONNECTOR

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 transmitter ...

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 pattern of the tire pressure warning light. WIRING DIAGRAM HINT ...

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