T–152
ON-BOARD DIAGNOSTIC [HEADLIGHT AUTO LEVELING SYSTEM]
Diagnostic procedure for headlight (LH)
Diagnostic procedure for headlight (RH)
End Of Sie
STEP INSPECTION ACTION
1
INSPECT CONNECTION
• Check fit of auto leveling control unit and fit
of connectors.
• Is 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 WIRING HARNESS BETWEEN
AUTO LEVELING SENSOR
CONNECTORS AND HEADLIGHT
(LH) CONNECTOR
• Disconnect front and rear auto leveling
sensor connector (6-pin) and headlight (LH)
connector (4-pin).
• Is there no continuity between the following
connectors?
— Headlight (LH) connector (terminal 2C)
and front auto leveling sensor connector
(terminal A)
— Headlight (LH) connector (terminal 2D)
and front auto leveling sensor connector
(terminal D)
Yes Go to next step.
No Repair or replace wiring harness between front auto leveling
sensor and headlight (LH).
3
INSPECT HEADLIGHT (LH)
• Disconnect auto leveling control unit (main)
connector (20-pin) and headlight (LH)
connector (4-pin).
• Is there no continuity between the following
connectors?
— Headlight (LH) connector (terminal 2B)
and auto leveling control unit (main)
connector (terminal H)
— Headlight (LH) connector (terminal 2A)
and auto leveling control unit (main)
connector (terminal F)
Yes Clear DTC and check DTC again.
• If DTC is displayed again, replace auto leveling control
unit.
(See T–30 DISCHARGE HEADLIGHT CONTROL UNIT
REMOVAL/INSTALLATION)
No Replace headlight (LH). (See T–26 FRONT COMBINATION
LIGHT REMOVAL/INSTALLATION)
STEP INSPECTION ACTION
1
INSPECT CONNECTION
• Check fit of auto leveling control unit.
• Is 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 (RH)
• Disconnect auto leveling control unit (sub)
connector (20-pin).
• Is there no continuity between the following
connectors?
— Terminals F and K
Yes Clear DTC and check DTC again.
• If DTC is displayed again, replace auto leveling control
unit.
(See T–30 DISCHARGE HEADLIGHT CONTROL UNIT
REMOVAL/INSTALLATION)
No Replace headlight (LH). (See T–26 FRONT COMBINATION
LIGHT REMOVAL/INSTALLATION)
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