Headlight Beam Level Control Actuator 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.
- CHECK HARNESS AND CONNECTOR (HEADLIGHT BEAM LEVEL CONTROL MOTOR - ECU)
- Disconnect the headlight assembly connector on the headlight beam level control motor side and the headlight beam level control ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
LH Side
RH Side
Tester Connection Condition Specified Condition A21-28 - A5-2 Always Below 1 Ω A21-29 - A5-1 Always Below 1 Ω A21-30 - A5-4 Always Below 1 Ω A21-31 - A5-3 Always Below 1 Ω A21-28 - Body ground Always 10 kΩ or higher A21-29 - Body ground Always 10 kΩ or higher A21-30 - Body ground Always 10 kΩ or higher A21-31 - Body ground Always 10 kΩ or higher Tester Connection Condition Specified Condition A21-9 - A27-2 Always Below 1 Ω A21-10 - A27-1 Always Below 1 Ω A21-11 - A27-4 Always Below 1 Ω A21-12 - A27-3 Always Below 1 Ω A21-9 - Body ground Always 10 kΩ or higher A21-10 - Body ground Always 10 kΩ or higher A21-11 - Body ground Always 10 kΩ or higher A21-12 - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: Go to next step
- INSPECT HEADLIGHT BEAM LEVEL CONTROL MOTOR
- Measure the resistance according to the value(s) in the table below.
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Standard resistance
LH Side
RH Side
Tester Connection Condition Specified Condition A5-1 - A5-2 Always 5.8 to 12.5 Ω A5-3 - A5-4 Always 5.8 to 12.5 Ω Tester Connection Condition Specified Condition A27-1 - A27-2 Always 5.8 to 12.5 Ω A27-3 - A27-4 Always 5.8 to 12.5 Ω HINT:
Measure the resistance after the headlight has cooled down.
NG → REPLACE HEADLIGHT BEAM LEVEL CONTROL MOTOR
OK → PROCEED TO PROBLEM SYMPTOMS TABLE NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
- Measure the resistance according to the value(s) in the table below.