Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR RH

Connect 3 dry cell batteries (1.5 V) in a series.
Connect the positive (+) lead from the battery to terminal 1 and negative (-) lead from the battery to terminal 3.

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

Fig 1: Inspecting Height Control Sensor Sub-Assembly Rear RH

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Voltage

VOLTAGE REFERENCE CHART

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: Go to Next step

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

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

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

Fig 2: Identifying H26 Height Control Sensor Rear RH Connector Terminals

Resistance

TESTER CONNECTION SPECIFIED CONDITION

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