Height Control Sensor Circuit: Procedure
WARNING: This page is about a different car, the 2011 Toyota Avalon. 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 series.
- Remove the height control sensor sub-assembly rear.
- Connect the positive (+) lead from the battery to terminal 3 and the negative (-) lead from the battery to terminal 1.
- Measure the voltage between terminals 2 and 1 while slowly moving the link up and down.
Standard voltage
Tester Connection Condition Specified Condition L9-2 (SHRR) - L9-1 (SHG) +45° (High) Approx. 4.5 V L9-2 (SHRR) - L9-1 (SHG) 0° (Normal) Approx. 2.5 V L9-2 (SHRR) - L9-1 (SHG) -45° (Low) Approx. 0.5 V
NG → REPLACE HEIGHT CONTROL SENSOR SUB-ASSEMBLY REAR RH
OK: Go to next step
- CHECK HARNESS AND CONNECTOR (HEIGHT CONTROL SENSOR - HEADLIGHT BEAM LEVEL CONTROL ECU)
- Disconnect connector L9 of the height control sensor sub-assembly and connector A21 of the headlight beam level control ECU.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
Tester Connection Condition Specified Condition A21-17 (SGR) - L9-1 (SHG) Always Below 1 Ω A21-19 (SHRL) - L9-2 (SHRR) Always Below 1 Ω A21-21 (SBR) - L9-3 (SHB) Always Below 1 Ω L9-3 (SHB) - Body ground Always 10 kΩ or higher L9-2 (SHRR) - Body ground Always 10 kΩ or higher L9-1 (SHG) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → PROCEED TO PROBLEM SYMPTOMS TABLE NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE