Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MULTI-DISPLAY)

Disconnect the main body ECU connector E60 and multi-display connector E62.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
DR - ACAN	Always	Below 1 Ω
DR - Body ground	Always	10 kΩ or higher

Fig 1: Identifying Main Body ECU Connector E60 And Multi-Display Connector E62

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

INSPECT MAIN BODY ECU (OUTPUT SIGNAL)

Reconnect the main body ECU connector.
Turn the engine switch on (IG).
Turn the light control switch to the TAIL or HEAD position.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
DR - Body ground	Automatic light control sensor is covered.	Above 9 V

Fig 2: Identifying Main Body ECU Connector

NG: GO TO LIGHTING SYSTEM

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