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.

NOTE: It is necessary to register an ID code after replacing the tire pressure monitor valve sub-assembly and/or the tire pressure monitor ECU (see REGISTRATION ).

CHECK TIRE PRESSURE WARNING RESET SWITCH FUNCTION
1. Perform the tire pressure warning reset switch test in TEST MODE PROCEDURE .
  OK:
  
  Reset switch ON:
  
  Tire pressure warning light comes on.
  
  Reset switch OFF:
  
  Tire pressure warning light blinks.
OK: END

NG: GO TO NEXT STEP

INSPECT TIRE PRESSURE WARNING RESET SWITCH

Remove the reset switch.

Measure the resistance of the switch.

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Switch Condition	Specified Condition
3 - 4	ON	Below 1 Ω
3 - 4	OFF	10 kΩ or higher

NG: REPLACE TIRE PRESSURE WARNING RESET SWITCH

Fig 1: Inspecting Tire Pressure Warning Reset Switch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

CHECK WIRE HARNESS (RESET SWITCH - ECU)

Disconnect the T27 switch connector.
Disconnect the T25 ECU connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
T27-3 - T25-8 (CALSW)	Below 1 Ω
T27-3 - Body ground	10 kΩ or higher
T27-4 - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 2: Identifying Reset Switch & ECU Connector Terminals

OK: REPLACE TIRE PRESSURE MONITOR ECU