Last Modified: 6-7-2017 6.8:8.0.40 Doc ID: RM0000018LY000X
Model Year Start: 2006 Model: Land Cruiser Prod Date Range: [05/2005 -           ]
Title: TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: Tire Pressure Warning Reset Switch Circuit; 2006 MY Land Cruiser [05/2005 -        ]

Tire Pressure Warning Reset Switch Circuit

DESCRIPTION

Receiving the signal from the tire pressure warning reset switch, the tire pressure monitor ECU indicates the initialization of the tire pressure warning system.

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

It is necessary to register an ID code after replacing the tire pressure monitor valve sub-assembly and/or the tire pressure monitor ECU 2006 MY Land Cruiser [05/2005 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: REGISTRATION .

PROCEDURE

1.

CHECK TIRE PRESSURE WARNING RESET SWITCH FUNCTION

(a) Perform the tire pressure warning reset switch test in TEST MODE PROCEDURE 2006 MY Land Cruiser [05/2005 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: TEST MODE PROCEDURE .

OK:

Reset switch ON:

Tire pressure warning light comes on.

Reset switch OFF:

Tire pressure warning light blinks.

OK

END

NG

2.

INSPECT TIRE PRESSURE WARNING RESET SWITCH

(a) Remove the reset switch.

(b) Measure the resistance of the switch.

Standard resistance:

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

OK

3.

CHECK WIRE HARNESS (RESET SWITCH - ECU)

(a) Disconnect the T27 switch connector.

(b) Disconnect the T25 ECU connector.

(c) Measure the resistance of the wire harness side connectors.

Standard resistance:

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

OK

REPLACE TIRE PRESSURE MONITOR ECU