Initial Set Control Function Operates, But Headlamp Aiming Does Not Operate (Warning Lamp Goes Off): Wiring Diagram

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Initial Set Control Function Operates, But Headlamp Aiming Does Not Operate (Warning Lamp Goes Off)

CHECK INITIALIZE
1. Start engine.
2. Check that initial set control function of both headlamps operates.
  
  Fig 2: Checking Initial Set Control Function Of Both Headlamps Operates
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  B: Go to step 3
  
  A: Go to Next Step
CHECK HEAD LIGHT UNIT (HEADLAMP LEVELING MOTOR)
1. Inspect headlamp leveling motor resistance.
  1. Check that there is continuity between terminal 2 and 5.
    
    Fig 3: Checking Continuity Between Terminals 2 & 5
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Check that there is resistance between terminals as shown in Fig 4 .
  Fig 4: Checking Head Light Unit (Headlamp Leveling Motor) Resistance Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: Go to step 4
  
  NG: REPLACE HEAD LIGHT UNIT (LEVELING MOTOR)
CHECK HEADLAMP LEVELING ECU ASSY
1. Check signal waveform.
  1. RH:
    Using an oscilloscope, check signal waveform between terminal H14-16 (RH1), H14- 15 (RH2), H14-4 (RH3), H14-13 (RH4) and body ground.
  2. LH:
    Using an oscilloscope, check signal waveform between terminal H14-3 (LH1), H14-2 (LH2), H14-5 (LH3), H14-14 (LH4) and identifying body ground.
    
    Standard: Signal waveform 2
  3. Signal waveform 2
  Fig 5: Identifying Signal Waveform 2
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 6: Signal Waveform 2 Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK: Go to step 6
  
  NG: Go to Next Step
CHECK HEADLAMP LEVELING ECU ASSY
1. Measure voltage between terminal H14-10 (HDLP) and H14-12 (GND) of headlamp leveling ECU assy.
  Standard: Below 1.5 V
  
  OK: Go to step 7
  
  NG: Go to Next Step
CHECK HARNESS AND CONNECTOR (BETWEEN MULTIPLEX NETWORK BODY COMPUTER AND HEADLAMP LEVELING ECU ASSY)
1. Check the continuity between terminal H14-10 (HDLP) of headlamp leveling ECU assy and multiplex network body computer.
  Standard: There is continuity.
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
  
  OK: REPLACE DRIVER SIDE JUNCTION BLOCK ASSY
CHECK HEAD LIGHT UNIT (Damage)
1. Inspect headlamp leveling motor resistance.
  1. Check that there is continuity between terminal 2 and 5.
    
    Fig 7: Checking Continuity Between Terminals 2 & 5
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Check that there is resistance between terminals as shown in Fig 8 .
  Fig 8: Checking Resistance Between Terminals Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
  
  OK: REPLACE HEADLIGHT UNIT (DAMAGE)
CHECK HEADLAMP LEVELING ECU ASSY (SHR TERMINAL VOLTAGE)
1. Measure voltage between terminal H14-23 (SHR) and H14-19 (SGR) of headlamp leveling ECU assy.
  Standard: 2.5 V
  
  OK: CHECK AND REPLACE HEADLAMP LEVELING ECU ASSY
  
  NG: Go to Next Step
INSPECT HEIGHT CONTROL SENSOR SUB-ASSY REAR RH
1. Connect 3 batteries (1.5 V) in series.
2. Connect the battery positive terminal to terminal SHB, and the negative one to terminal SHG to apply the voltage of 4.5 V between terminals SHB and SHG.
3. While slowly moving the link up and down with the voltage being applied, check the voltage between terminals SHRR and SHG.
  
  Fig 9: Checking Voltage Between Terminals SHRR & SHG
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 10: Height Control Sensor Sub-Assy Rear RH Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPLACE HEIGHT CONTROL SENSOR SUBASSY REAR RH
  
  OK: Go to Next Step
CHECK HEADLAMP LEVELING ECU ASSY
1. Disconnect the connector of headlamp leveling ECU assy.
2. Check the continuity between terminal 7 (SS2) of the vehicle side connector of the headlamp leveling ECU assy and body ground when passenger side seat belt buckle switch ON.
  Standard: There is continuity
  
  Fig 11: Checking Continuity Between Terminal 7 & Body Ground
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  NG: REPLACE SENSOR
  
  OK: CHECK AND REPLACE HEADLAMP LEVELING ECU ASSY