Lighting System Vehicle Speed Signal Circuit

Vehicle Exterior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Lighting (Ext). Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED)

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - HEADLIGHT LEVELING ECU ASSEMBLY)

CHECK COMBINATION METER ASSEMBLY

LIGHTING SYSTEM - Vehicle Speed Signal Circuit


DESCRIPTION

The headlight leveling ECU receives the vehicle speed signal from the combination meter.

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System.Lighting System Vehicle Speed Signal Circuit


INSPECTION PROCEDURE

NOTICE:
After replacing the headlight leveling ECU, initialization of the ECU is necessary (Click here).
1.READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED)

  1. Using the intelligent tester, read the Data List (Click here).

    HL Auto Leveling (w/ Static Headlight Auto Leveling)
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Vehicle Speed
    		Vehicle speed / 0 to 327.67 km/h
    		Actual vehicle speed
    		-
    OK:
    The display is as specified in the normal condition column.


NG
Go to step 2
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

2.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - HEADLIGHT LEVELING ECU ASSEMBLY)

  1. Disconnect the E7 combination meter connector.

  1. Disconnect the E109 headlight leveling ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E7-4 (+S) - E109-16 (SPDR)
    		Always
    		Below 1 Ω
    E7-4 (+S) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK COMBINATION METER ASSEMBLY


  1. w/ Multi-information Display:



      Land Cruiser. Urj200, 202 Grj200 Vdj200.Lighting (Ext).Lighting System.Lighting System Vehicle Speed Signal Circuit

    1. Remove the combination meter with its connector still connected (Click here).

  1. w/o Multi-information Display:

    1. Remove the combination meter with its connector still connected (Click here).

  1. Connect an oscilloscope to the combination meter connector.

  1. Check the waveform.

    Measurement Condition
    Item
    		Content
    Terminal No. (Symbol)
    		E7-4 (+S) - Body ground
    Tool setting
    		5 V/DIV., 20 ms./DIV.
    Condition
    		Vehicle is driven at approximately 20 km/h (12 mph)
    OK:
    Waveform is as shown in the illustration.
    Text in Illustration
    *a
    		Component with harness connected
    (Combination Meter Assembly)
    HINT:
    When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.


NG
GO TO METER / GAUGE SYSTEM (Click here)
OK

REPLACE HEADLIGHT LEVELING ECU ASSEMBLY (Click here)