Inspection Procedure

WARNING: This page is about a different car, the 2008 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT HEADLIGHT BEAM LEVEL CONTROL MOTOR LH

Disconnect the connector from headlight beam level control motor LH.

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

Fig 1: Inspecting Headlight Beam Level Control Motor LH

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
1 (LH2) - 5 (LHB1)	Always	26 to 30 Ω
3 (LH4) - 5 (LHB1)	Always	26 to 30 Ω
4 (LH1) - 5 (LHB1)	Always	26 to 30 Ω
6 (LH3) - 5 (LHB1)	Always	26 to 30 Ω

NG: REPLACE HEADLIGHT BEAM LEVEL CONTROL MOTOR LH

OK: Go to Next step

CHECK HARNESS AND CONNECTOR (LEVEL CONTROL MOTOR LH - LEVEL CONTROL ECU)

Disconnect the H3 connector of headlight beam level control motor LH and the H17 connector of the headlight beam level control ECU.

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

Fig 2: Checking Harness And Connector (Level Control Motor LH - Level Control ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
H3-1 (LH2) - H17-26 (LH2)	Always	Below 1 Ω
H3-3 (LH4) - H17-25 (LH4)	Always	Below 1 Ω
H3-4 (LH1) - H17-24 (LH1)	Always	Below 1 Ω
H3-5 (LHB1) - H17-22 (LHG)	Always	Below 1 Ω
H3-6 (LH3) - H17-23 (LH3)	Always	Below 1 Ω
H17-26 (LH2) - Body ground	Always	10 kΩ or higher
H17-25 (LH4) - Body ground	Always	10 kΩ or higher
H17-24 (LH1) - Body ground	Always	10 kΩ or higher
H17-22 (LHG) - Body ground	Always	10 kΩ or higher
H17-23 (LH3) - 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 RH

Disconnect the connector from headlight leveling motor RH.

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

Fig 3: Inspecting Headlight Beam Level Control Motor RH

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
1 (RH2) - 5 (RHB1)	Always	26 to 30 Ω
3 (RH4) - 5 (RHB1)	Always	26 to 30 Ω
4 (RH1) - 5 (RHB1)	Always	26 to 30 Ω
6 (RH3) - 5 (RHB1)	Always	26 to 30 Ω

NG: REPLACE HEADLIGHT BEAM LEVEL CONTROL MOTOR RH

OK: Go to Next step

CHECK HARNESS AND CONNECTOR (LEVEL CONTROL MOTOR RH - LEVEL CONTROL ECU)

Disconnect the H7 connector of headlight beam level control motor RH and the H17 connector of the headlight beam level control ECU.

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

Fig 4: Identifying H7 Headlight Beam Level Control Motor RH And H17 Headlight Beam Level Control ECU Connector Terminals

Resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester connection	Condition	Specified condition
H7-1 (RH2) - H17-13 (RH2)	Always	Below 1 Ω
H7-3 (RH4) - H17-12 (RH4)	Always	Below 1 Ω
H7-4 (RH1) - H17-11 (RH1)	Always	Below 1 Ω
H7-5 (RHB1) - H17-9 (RHG)	Always	Below 1 Ω
H7-6 (RH3) - H17-10 (RH3)	Always	Below 1 Ω
H17-13 (RH2) - Body ground	Always	10 kΩ or higher
H17-12 (RH4) - Body ground	Always	10 kΩ or higher
H17-11 (RH1) - Body ground	Always	10 kΩ or higher
H17-9 (RHG) - Body ground	Always	10 kΩ or higher
H17-10 (RH3) - 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