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.

CHECK MULTI-DISPLAY CONTROLLER

Disconnect the R32 controller connector.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Switch Condition	Specified Condition
R32-12 (MUT3) - Body ground	Turn power switch ON (ACC), audio system is playing → Changing modes	3.5 V or higher → Below 1 V

Fig 1: Identifying R32 Controller Connector

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NG: Go to step 2

OK: REPLACE MULTI-DISPLAY CONTROLLER (See REMOVAL )

CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION ASSEMBLY - MULTI-DISPLAY CONTROLLER)

Disconnect the L62 navigation connector.
Disconnect the R32 controller connector.

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

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Condition	Specified Condition
L62-7 (MUT2) - R32-12 (MUT3)	Always	Below 1 Ω
L62-7 (MUT2) - Body ground	Always	10 kΩ or higher

Fig 2: Checking Harness And Connector (Display And Navigation Assembly - Multi-Display Controller)

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE DISPLAY AND NAVIGATION ASSEMBLY (see REMOVAL )