Navigation System Vehicle Speed Signal Circuit Between Multi-Display And Combination Meter

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Navigation. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WIRE HARNESS (COMBINATION METER - MULTI-DISPLAY)

CHECK COMBINATION METER

NAVIGATION SYSTEM - Vehicle Speed Signal Circuit between Multi-display and Combination Meter


DESCRIPTION

The multi-display performs the switch operation control while the vehicle is running by receiving the vehicle speed signal from the combination meter.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Navigation.Navigation System.Navigation System  Vehicle Speed Signal Circuit Between Multi-Display And Combination Meter


INSPECTION PROCEDURE

1.CHECK WIRE HARNESS (COMBINATION METER - MULTI-DISPLAY)
Lexus Gs430, Gs300. Uzs190 Grs190.Navigation.Navigation System.Navigation System  Vehicle Speed Signal Circuit Between Multi-Display And Combination Meter
  1. Disconnect the L46 multi-display connector.

  1. Disconnect the L31 meter connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    L46-14 (SPD) - L31-9 (+S)
    Always
    Below 1 Ω
    L46-14 (SPD) - Body ground
    Always
    10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


2.CHECK COMBINATION METER
Lexus Gs430, Gs300. Uzs190 Grs190.Navigation.Navigation System.Navigation System  Vehicle Speed Signal Circuit Between Multi-Display And Combination Meter
  1. Connect the L31 meter connector.

  1. Measure the voltage.

    1. Move the shift lever to the neutral position.

    2. Jack up either one of the rear wheels.

    3. Turn the engine switch on (IG).

    4. Measure the voltage between terminal +S and body ground of the combination meter when the rear wheels are turned slowly.

      Standard voltage:
      Tester Connection
      Condition
      Specified Condition
      L31-9 (+S) - Body ground
      Engine switch on (IG), rear wheels turned slowly
      Voltage pulses as shown


NG
GO TO COMBINATION METER SYSTEM
OK

REPLACE MULTI-DISPLAY