Mazda 626 Station Wagon, Workshop Manual

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ON-BOARD DIAGNOSTIC
STEP INSPECTION ACTION
4
INSPECT WIRING HARNESS BETWEEN
PASSENGER-SIDE AIR BAG MODULE AND
SAS UNIT
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait
for more than 1 minute.
• Remove clock spring.
(See Section T)
• Disconnect driver and passenger-side side
air bag module connectors. (Vehicles with
side air bag)
• Remove B-pillar lower trims.
• Disconnect driver and passenger-side
pre-tensioner seat belt connectors.
• Remove side walls.
• Disconnect all SAS unit connectors.
• Inspect following wiring harness between
SAS unit and passenger-side air bag
module terminals (harness side) for short
to ground, short to power supply, and open
circuit:
— 2Y and A
— 2AB and B
• Are wiring harnesses okay?
Yes
Present malfunction diagnosis:
•
Replace SAS unit.
(See T-59 SAS UNIT REMOVAL/INSTALLATION)
Past malfunction diagnosis:
•
Replace passenger-side air bag module.
(See Section T)
No
Replace wiring harnesses.
5 VERIFY THAT TERMINAL 2AC OF SAS
UNIT CONNECTOR IS GROUNED
Warning
• Handling air bag system components
improperly can accidentally deploy
air bag modules and pre-tensioner
seat belts, which may seriously injure
you. Read AIR BAG SYSTEM SER­
VICE WARNINGS before handling air
bag system components. See T-56
SERVICE WARNINGS
Yes Present malfunction diagnosis:
• Replace SAS unit.
(See T-59 SAS UNIT REMOVAL/INSTALLATION)
Past malfunction diagnosis:
• Replace passenger-side air bag module.
(See Section T)
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait
for more than 1 minute.
• Remove column cover.
• Disconnect clock spring connector.
• Remove B-pillar lower trims.
• Disconnect driver and passenger-side
pre-tensioner seat belt connector.
• Remove side walls.
• Disconnect all SAS unit connectors.
• Inspect wiring harness between terminal
2AC of SAS unit and ground for following.
— Short to power supply
— Open circuit
• Is wiring harness okay?
No Replace wiring harnesses.
T -7 2