Toyota Tacoma (2015-2018) Service Manual: Initialization Switch (for Test Mode DTC) (C2198/98)

Toyota Tacoma (2015-2018) Service Manual / 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.	DTC Detection Condition	Trouble Area
C2198/98	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 (See page ) after registration (See page ) 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) Disconnect the T15 tire pressure warning reset switch connector.

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

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
1 (INT) - 2 (E)	On	Below 1 Ω
1 (INT) - 2 (E)	Off	10 kΩ or higher

Text in Illustration

Component without harness connected

(Tire Pressure Warning Reset Switch)

Off

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 T15 tire pressure warning reset switch connector and T14 tire pressure warning ECU and receiver connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
T14-3 (CLSW) - T15-1 (INT)	Always	Below 1 Ω
T14-3 (CLSW) - Body ground	Always	10 kΩ or higher
T15-2 (E) - 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)

DESCRIPTION The main body ECU (multiplex network body ECU) sends signals to the tire pressure warning ECU and receiver via a direct line. DTC No. Detection Item DT ...

Tire Pressure Monitor Receiver Communication Stop (B1247)

DESCRIPTION The main body ECU (multiplex network body ECU) and tire pressure warning ECU and receiver are connected using 2 direct lines that they use to communicate with each other. ...

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