Specifications

T150
ON-BOARD DIAGNOSTIC [HEADLIGHT AUTO LEVELING SYSTEM]
Diagnostic procedure
End Of Sie
STEP INSPECTION ACTION
1
INSPECT CONNECTOR CONNECTION
• Check fit of auto leveling control units and
headlight connectors on both sides (auto
leveling control unit (main) and (sub)).
• Are installation condition and fit okay?
Yes Go to next step.
No After correcting fit, clear DTC and check DTC again.
• If DTC is displayed again, go to next step.
2
INSPECT HEADLIGHT (LH) AND
HEADLIGHT (RH)
• Disconnect auto leveling control unit (main)
connector (20-pin) and headlight (LH)
connector (12-pin) and auto leveling control
unit (sub) connector (20-pin) and headlight
(RH) connector (12-pin).
• Is there continuity between the following
connectors?
 Auto leveling control unit (main) connector
(terminal I) and headlight (LH) connector
(terminal 1F)
 Auto leveling control unit (sub) connector
(terminal P) and headlight (RH) connector
(terminal 1F)
Yes Go to next step.
No Possible cause is an open circuit in headlight. Replace
headlight (LH) or headlight (RH). (See T26 FRONT
COMBINATION LIGHT REMOVAL/INSTALLATION)
3
INSPECT WIRING HARNESS BETWEEN
HEADLIGHT (LH) CONNECTOR AND
HEADLIGHT (RH) CONNECTOR
• Disconnect headlight (LH) connector (12-pin)
and headlight (RH) connector (12-pin).
• Is there continuity between the following
connectors?
 Headlight (LH) connector (terminal 1F)
and headlight (RH) connector (terminal
1F)
Yes Repair auto leveling control unit (main).
(See T30 DISCHARGE HEADLIGHT CONTROL UNIT
REMOVAL/INSTALLATION)
No Repair or replace wiring harness between headlight (LH)
and headlight (RH).