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.

Fig 1: Display And Navigation Assembly - Wiring Diagram

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

INSPECT FUSE (RADIO NO. 1, P-ACC, P-IG1-1)

Remove the RADIO NO. 1, P-ACC and P-IG1-1 fuses from the passenger side junction block.

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Condition	Specified Condition
RADIO NO.1 fuse	Always	Below 1 Ω
P-ACC fuse
P-IG1-1 fuse

NG: REPLACE FUSE

OK: Go to next step

CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION ASSEMBLY - BATTERY AND BODY GROUND)

Disconnect the L59 display connector

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

Standard resistance

RESISTANCE SPECIFIED CONDITIONS

Tester Connection	Condition	Specified Condition
L59-10 (GND1) - Body ground	Always	Below 1 Ω

Fig 2: Identifying L59 Display Connector Terminals

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

Standard voltage

VOLTAGE SPECIFIED CONDITION

Tester Connection	Switch Condition	Specified Condition
L59-1 (+B1) - L59-10 (GND1)	Always	11 to 14 V
L59-2 (ACC) - L59-10 (GND1)	Power switch ON (ACC)	11 to 14 V
L59-3 (IG) - L59-10 (GND1)	Power switch ON (IG)	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 )