Mazda 626 Station Wagon, Workshop Manual

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ON-BOARD DIAGNOSTIC
STEP INSPECTION ACTION
4
INSPECT WIRING HARNESS BETWEEN
INSTRUMENT CLUSTER ANS SAS UNIT
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
SERVICE WARNINGS before handling
air bag system components. See
T-56 SERVICE WARNINGS
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait
for more than 1 minute.
• Remove clock spring.
(See Section T)
• Remove glove compartment.
Yes Present malfunction diagnosis:
Replace SAS unit.
(See T-59 SAS UNIT REMOVAL/INSTALLATION)
Past malfunction diagnosis:
Go to next step.
• Disconnect passenger-side air bag module
connector.
• Disconnect driver and passenger-side side
air bag module connectors. (Vehicle with
side air bag)
• Remove B-pillar lower trim.
• Disconnect drive- and passenger-side
pre-tensioner seat belt connectors.
• Remove side walls.
• Disconnect all SAS unit connectors.
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Measure voltage at 3G of SAS unit
connector.
• Is voltage more than 9V?
No
Go to next step.
5 INSPECT WIRING HARNESS BETWEEN
INSTRUMENT CLUSTER AND SAS UNIT
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable.
• Remove instrument cluster.
• Inspect wiring harness between terminal 2F
of instrument cluster connector and terminal
3G of SAS unit connector for following.
— Short to ground
• Is wiring harness okay?
Yes Present malfunction diagnosis:
Replace instrument cluster.
Past malfunction diagnosis:
Go to next step.
No Replace wiring harness.
6 INSPECT PASENGER-SIDE AIR BAG
CUT-OFF INDICATOR LIGHT BULB
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait
Yes Reinstall passenger-side air bag cut-off indicator light
bulb, then go to next step.
for more than 1 minutes.
• Remove instrument cluster.
• Is passenger-side air bag cut-off indicator
light bulb okay?
No
Replace passenger-side air bag cut-off indicator light
bulb.
7 INSPECT INSTRUMENT CLUSTER
• Is there continuity between terminals 1 J
and 2F of instrument cluster?
Yes Go to next step.
No Replace instrument cluster.
T -9 9