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Home >> Lexus >> 2009 >> LS 460L AWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Navigation >> NAVIGATION SYSTEM (for HDD) >> Display and Navigation Assembly Power Source Circuit >> Inspection Procedure

Inspection Procedure

Fig 1: Display And Navigation Assembly Power Source - Wiring Diagram
G06190616Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. INSPECT FUSE (RADIO NO. 1, P-ACC, P-IG1-1) 
    1. Remove the RADIO NO. 1, P-ACC and P-IG1-1 fuses from the passenger side junction block.
    2. Measure the resistance of the fuses.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION

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

      NG: REPLACE FUSE 

      OK: Go to Next Step 

  2. CHECK HARNESS AND CONNECTOR (DISPLAY AND NAVIGATION ASSEMBLY BATTERY AND BODY GROUND) 
    1. Disconnect the L59 display connector.
    2. Measure the resistance of according to the value (s) in the table below.

      Standard resistance 

      STANDARD RESISTANCE SPECIFICATION

      Tester Connection Condition Specified Condition
      L59-10 (GND1) - Body ground Always Below 1 Ω
    3. Measure the voltage of according to the value (s) in the table below.
      Fig 2: Identifying L59 Display Connector Terminals
      G06190617Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      STANDARD VOLTAGE SPECIFICATION

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

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