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 ).

INSPECT FUSE (ECU-IG1)
1. Remove the ECU-IG1 fuse from the cowl side junction block LH.
2. Measure the resistance of the fuse.
  Standard resistance:
  
  Below 1 Ω
NG: REPLACE FUSE

OK: GO TO NEXT STEP

INSPECT RELAY (IG1 NO. 2)

Remove the IG1 NO. 2 relay from the cowl side junction block LH.

Measure the resistance of the relay.

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
1 - 2	Below 1 Ω
3 - 5	10 kΩ or higher
3 - 5	Below 1 Ω (When battery voltage is applied to terminals 1 and 2)

Fig 1: Inspecting Relay (IG1 No. 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY

OK: GO TO NEXT STEP

INSPECT TIRE PRESSURE MONITOR ECU

Disconnect the T25 ECU connector.

Measure the voltage of the wire harness side connector.

Standard voltage

VOLTAGE SPECIFIED CONDITIONS

Tester Connection	Switch Condition	Specified Condition
T25-1 (IG) - Body ground	Ignition switch ON	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 2: Identifying T25 ECU IG Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

CHECK WIRE HARNESS (ECU - BODY GROUND)

Disconnect the T25 ECU connector.

Measure the resistance of the wire harness side connector.

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Specified Condition
T25-9 (GND) - Body ground	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

Fig 3: Identifying T25 ECU GND Connector Terminal

OK: REPLACE TIRE PRESSURE MONITOR ECU