Mazda 6 2002 Workshop Manual page 1004

ON-BOARD DIAGNOSTIC [HEADLIGHT AUTO LEVELING SYSTEM]
Diagnostic procedure for headlight (LH)
STEP
INSPECT CONNECTION
• Check fit of auto leveling control unit and fit
1
of connectors.
• Is fit okay?.
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).
2
• 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)
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?
3
— 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)
Diagnostic procedure for headlight (RH)
STEP
INSPECT CONNECTION
1
• Check fit of auto leveling control unit.
• Is fit okay?.
INSPECT HEADLIGHT (RH)
• Disconnect auto leveling control unit (sub)
connector (20-pin).
2
• Is there no continuity between the following
connectors?
— Terminals F and K
End Of Sie
T–152
INSPECTION
INSPECTION
Yes Go to net step.
No After correcting fit, clear DTC and check DTC again.
• If DTC is displayed again, go to net step.
Yes Go to net step.
No Repair or replace wiring harness between front auto leveling
sensor and headlight (LH).
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
LIGHT REMOVAL/INSTALLATION)
Yes Go to net step.
No After correcting fit, clear DTC and check DTC again.
• If DTC is displayed again, go to net step.
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
LIGHT REMOVAL/INSTALLATION)
ACTION
T–26 FRONT COMBINATION
ACTION
T–26 FRONT COMBINATION