Toyota CH-R Service Manual: Tire Pressure Warning Light Circuit

Toyota CH-R Service Manual / Tire Pressure Monitoring / Tire Pressure Warning System / 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 canceled at the same time. At this time, the ECU stores a DTC in memory.

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

The tire pressure warning ECU and receiver sends the tire pressure warning light illumination request signal to the main body ECU (multiplex network body ECU) via a direct line. The main body ECU (multiplex network body ECU) then sends the signal to the combination meter assembly via CAN communication.

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 and/or one of the valve and transmitters has been replaced.

PROCEDURE

1.	CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

(a) Check if CAN communication system DTCs are output.

Click here

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

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK DTC OUTPUT (B1247)

(a) Clear the DTCs.

Click here

Chassis > Tire Pressure Monitor > Clear DTCs

(b) Turn the ignition switch off.

(d) Check for DTCs.

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Chassis > Tire Pressure Monitor > Trouble Codes

OK:

DTC B1247 is not output.

GO TO DTC (B1247)

3.	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 using the Techstream.

Body Electrical > Combination Meter > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Indicat. Tire Pressure Warning System	Tire pressure warning light	OFF or ON	Perform the test with the vehicle stopped and engine idling.

Body Electrical > Combination Meter > Active Test

Tester Display
Indicat. Tire Pressure Warning System

OK:

The tire pressure warning light turns on or off in accordance with the Techstream operation.

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

GO TO METER / GAUGE SYSTEM

ECU Power Source Circuit

DESCRIPTION This is the power source for the tire pressure warning ECU and receiver. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: When replacing the tire pressure warning ECU and rece ...

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 / NO ...

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Toyota CH-R Service Manual: Tire Pressure Warning Light Circuit

ECU Power Source Circuit

TC and CG Terminal Circuit

Other materials:

Toyota CH-R Owners Manual

Toyota CH-R Service Manual