Inspection Procedure

WARNING: This page is about a different car, the 2006 Lexus IS 350 and 2006 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (SECURITY)
1. Remove the SECURITY fuse from the cowl side junction block RH.
2. Measure the resistance of the fuse.
Standard resistance:

Below 1 Ω

NG: REPLACE FUSE

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ID CODE BOX - BATTERY)

Disconnect the J69 ECU connector.
Measure the voltage according to the value(s) in TERMINAL CONNECTION SPECIFIED CONDITION TABLE .

Standard voltage

Fig 1: Identifying J69 ECU Connector

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TERMINAL CONNECTION SPECIFIED CONDITION TABLE

Tester Connection	Condition	Specified Condition
J69-1 (+B) - Body ground	Always	10 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (ID CODE BOX - BODY GROUND)

Measure the resistance according to the value(s) in TERMINAL CONNECTION SPECIFIED CONDITION TABLE .

Standard resistance

Fig 2: Identifying J69 ID Code Box Connector

TERMINAL CONNECTION SPECIFIED CONDITION TABLE

Tester Connection	Condition	Specified Condition
J69-8 (GND) - Body ground	Always	Below 1 ohms

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE