Inspection Procedure

WARNING: This page is about a different car, the 2006 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

Start the inspection from step 1 when using the intelligent tester, and from step 2 when not using the intelligent tester.

READ VALUE OF INTELLIGENT TESTER

Connect the intelligent tester (with CAN VIM) to the DLC3.
Turn the ignition switch ON.

Select the item below in the DATA LIST, and read its value displayed on the intelligent tester.

Tire pressure monitor ECU

TIRE PRESSURE MONITOR ECU DATA LIST REFERENCE

Item	Measurement item / Range (Display)	Normal Condition	Diagnostic Note
SELECT SW	Select Switch Status	MAIN: Not pressing 2nd: Pressing	-

Check that the value displayed on the intelligent tester changes when pressing the tire pressure warning select switch.
OK:

Tire pressure warning select switch value changes.

OK: REPLACE TIRE PRESSURE MONITOR ECU

NG: GO TO NEXT STEP

INSPECT TIRE PRESSURE WARNING SELECT SWITCH

Remove the select switch.

Measure the resistance of the switch.

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Switch Position	Tester Connection	Specified Condition
MAIN	2 - 1	10 kΩ or higher
2nd	2 - 1	Below 1 Ω

NG: REPLACE TIRE PRESSURE WARNING SELECT SWITCH

Fig 1: Inspecting Tire Pressure Warning Select Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

CHECK WIRE HARNESS AND CONNECTOR (SELECT SWITCH - ECU)

Disconnect the T25 ECU connector.
Disconnect the T28 switch connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
T28-2 - T25-7 (IDSW)	Below 1 Ω
T28-1 - Body ground	Below 1 Ω
T25-7 (IDSW) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 2: Identifying Select Switch & ECU Connector Terminals

OK: REPLACE TIRE PRESSURE MONITOR ECU