Last Modified: 7-3-2017 6.8:8.0.40 Doc ID: RM0000018LX008X
Model Year Start: 2007 Model: LX470 Prod Date Range: [08/2006 -           ]
Title: TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: TC and CG Terminal Circuit; 2007 MY LX470 [08/2006 -        ]

TC and CG Terminal Circuit

DESCRIPTION

DTC output mode is set by connecting terminals TC and CG of the DLC3. The DTCs are indicated by the blinking of the tire pressure warning light.

WIRING DIAGRAM

HINT:

When each warning light continues blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in each ECU is suspected.

INSPECTION PROCEDURE

NOTICE:

  • When replacing the tire pressure warning ECU and receiver, read the IDs stored in the old ECU using the intelligent tester and write them down before removal.
  • It is necessary to perform initialization 2007 MY LX470 [08/2006 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: INITIALIZATION after registration 2007 MY LX470 [08/2006 -        ]; TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: REGISTRATION of the transmitter IDs into the tire pressure warning ECU and receiver after the ECU has been replaced.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (ECU - DLC3)

(a) Disconnect the T35 ECU connector.

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

Standard resistance:

Tester Connection

Condition

Specified Condition

T35-10 (TC) - D8-13 (TC)

Always

Below 1 Ω

T35-10 (TC) - Body ground

Always

10 kΩ or higher

D8-4 (CG) - Body ground

Always

Below 1 Ω
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER