LIGHTING SYSTEM > Height Control Sensor Circuit

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DESCRIPTION

The headlight beam level control ECU receives the height control sensor signal from the height control sensor sub-assembly.
The headlight beam level control ECU calculates a height value from the height control signal. The voltage at the power source of the height control sensor is corrected when SHR is detected.

WIRING DIAGRAM


B110605E01


INSPECTION PROCEDURE

1.INSPECT HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR RH

  1. Connect 3 dry cell batteries (1.5 V) in a series.

  1. Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead from the battery to terminal 3.



  1. Measure voltage between terminal 2 and terminal 3 when slowly move the link up and down.


    E068634E01

    Voltage:
    Link Angle
    		Standard voltage
    +45° (High)
    		4.5 V
    0° (Normal)
    		2.5 V
    -45° (Low)
    		0.5 V



NG
REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR RH
OK


2.CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR REAR RH - LEVEL CONTROL ECU)


    B110647E01

  1. Disconnect the H26 connector of height control sensor sub-assembly and the H17 connector of headlight leveling ECU assembly.

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    H17-16 (SGR) - H26-1 (SHG)
    		Always
    		Below 1 Ω
    H17-18 (SHR) - H26-2 (SHRR)
    		Always
    		Below 1 Ω
    H17-20 (SBR) - H26-3 (SHB)
    		Always
    		Below 1 Ω
    H26-1 (SHG) - Body ground
    		Always
    		10 kΩ or higher
    H26-2 (SHRR) - Body ground
    		Always
    		10 kΩ or higher
    H26-3 (SHB) - Body ground
    		Always
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE