Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT FUSE (SECURITY)

Remove the SECURITY fuse from the main body ECU.
Measure the resistance according to the value (s) in the table below.

Standard resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
SECURITY fuse	Always	Below 1 Ω

NG: REPLACE FUSE

OK: Go to next step

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND)
1. Disconnect the L15 ECU connector.
2. Measure the resistance according to the value (s) in the table below.

Fig 1: Checking Harness And Connector (Certification ECU - Battery And Body Ground)

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Standard resistance

RESISTANCE REFERENCE

Tester Connection	Condition	Specified Condition
L15-17 (E) - Body ground	Always	Below 1 Ω

Standard voltage

VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
L15-1 (+B1) - Body ground	Always	11 to 14 V

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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