Headlight Signal Circuit [10/2013 - ]: Procedure
WARNING: This page is about a different variant/trim than selected.
- READ VALUE USING TECHSTREAM
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Turn the Techstream on.
- Enter the following menus: Body Electrical / HL Auto Leveling / Data List.
- Read the display on the Techstream.HL AUTO LEVELING
Tester Display Measurement Item/Range Normal Condition Diagnostic Note Headlight Low Beam State Low beam headlight state/ON or OFF ON: Low beam headlights on
OFF: Low beam headlights off- OK
Normal conditions listed above are displayed.
NG → See step 2
OK → See step 4
- CHECK HARNESS AND CONNECTOR (HEADLIGHT LEVELING ECU ASSEMBLY)
- Disconnect the A96 headlight leveling ECU assembly connector.
- Measure the voltage according to the value(s) in the table below.
Standard Voltage
Tester Connection Condition Specified Condition A96-3 (HDLP) - Body ground Low beam headlights on Below 1.5 V Low beam headlights off 5 V or higher
NG → See step 3
OK → See step 5
- CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - HEADLIGHT LEVELING ECU ASSEMBLY)
- Disconnect the No. 1 integration relay connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition 1G-11 (HL4B) - A96-3 (HDLP) Always Below 1 Ω 1G-11 (HL4B) - Body ground Always 10 kΩ or higher
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 6
- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE [10/2013 - ]
- REPLACE HEADLIGHT LEVELING ECU ASSEMBLY. Refer to REMOVAL [10/2013 - ]
- REPLACE NO. 1 INTEGRATION RELAY. Refer to REMOVAL [10/2013 - ]