Inspection Procedure

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

CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - NAVIGATION ECU)

Disconnect the multi-display connector and navigation ECU connector.

Fig 1: Identifying Terminals Of Multi-Display Connector
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Measure the resistance according to the value(s) in the table below

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Condition	Specified Condition
p1-5 (MCO+) - p3-3 (MIC+)	Always	Below 1 Ω
p1-4 (MCO-) - p3-5 (MIC-)	Always	Below 1 Ω
p1-5 (MCO+) - Body ground	Always	10 kΩ or higher
p1-4 (MCO-) - Body ground	Always	10 kΩ or higher

Fig 2: Identifying Terminals Of Navigation ECU Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

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