Last Modified: 4-30-2014 6.6 J Doc ID: RM00000185Z000X
Model Year: 2006 Model: LX470 Prod Date Range: [05/2005 -           ]
Title: ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: Diagnosis Circuit; 2006 MY LX470 [05/2005 -        ]

Diagnosis Circuit

DESCRIPTION

This circuit sends a signal to the ECU that outputs DTC.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

INSPECT DLC3 TERMINAL VOLTAGE

(a) Turn the ignition switch ON.

(b) Measure the voltage of the connector.

Standard voltage:

Tester Connection

Condition

Specified Condition

4 (CG) - 7 (SIL)

Ignition switch ON

10 to 14 V
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

NG

2.

CHECK WIRE HARNESS (TRANSPONDER KEY ECU ASSEMBLY - DLC3 AND BODY GROUND)

(a) Disconnect the T27 ECU connector.

(b) Disconnect the D8 DLC3 connector.

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

Standard resistance:

Tester Connection

Specified Condition

T27-9 (D) - D8-7 (SIL)

Below 1 Ω

D8-4 (CG) - Body ground

T27-9(D) - Body ground

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR

OK

REPLACE TRANSPONDER KEY ECU ASSEMBLY