Toyota Tundra Service Manual: Initialization Switch (for Test Mode DTC) (C2198/98)

Toyota Tundra Service Manual / Engine, Hybrid System / Tire And Wheel / Tire Pressure Warning System / Initialization Switch (for Test Mode DTC) (C2198/98)

DESCRIPTION

During test mode, when the tire pressure warning reset switch is on, the tire pressure warning light comes on and when the tire pressure warning reset switch is off, the tire pressure warning light blinks at 0.125 second intervals.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Note
C2198/98	Initialization Switch (for Test Mode DTC)	Test mode procedure is performed.	Tire pressure warning reset switch Wire harness or connector Tire pressure warning ECU and receiver	-

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.
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.	INSPECT TIRE PRESSURE WARNING RESET SWITCH

(a) Turn the ignition switch off.

(b) Remove the tire pressure warning reset switch.

Click here

REPLACE TIRE PRESSURE WARNING RESET SWITCH

2.	CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING RESET SWITCH - TIRE PRESSURE WARNING ECU AND RECEIVER)

(a) Disconnect the J43 tire pressure warning reset switch connector.

(b) Disconnect the P21 tire pressure warning ECU and receiver connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
P21-3 (CLSW) - J43-1	Always	Below 1 Ω
P21-3 (CLSW) or J43-1 - Body ground	Always	10 kΩ or higher
J43-2 - Body ground	Always	Below 1 Ω

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

REPAIR OR REPLACE HARNESS OR CONNECTOR

Tire Pressure Monitor ECU Communication Stop (C2179/79)

Cannot Switch to Automatic ID Registration Mode

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