Mazda 626 Station Wagon, Workshop Manual

Page: 487 / 577

ON-BOARD DIAGNOSTIC
D ia g n o s t ic p r o c e d u r e
STEP INSPECTION A C TIO N
1
V ER IFY THAT A L L SAS u n it CONNECTORS
A R E CONNECTED WITH SAS u n it
W a rn in g
• H a n d lin g a ir bag s y s te m c o m p o n e n ts
im p ro p e rly c a n a c c id e n ta lly d e p lo y
a ir b a g m o d u le s and p re -te n s io n e r
se a t b e lts , w h ic h m a y s e rio u s ly in ju re
y o u . R ead A IR BAG SYSTEM
SERVICE W ARNINGS b e fo re h a n d lin g
a ir bag s y s te m c o m p o n e n ts . See
T -5 6 SERVICE W ARNINGS
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait
for
m o re th a n 1 m in u te .
• Remove side walls.
• Are all SAS unit connectors securely
connected?
Yes Go to next step.
No Reconnect connector properly.
2
INSPEC T A L L SAS UNIT CONNECTORS
• Remove clock spring.
(See Section T)
• Remove glove compartment. (Vehicle with
passenger-side air bag)
• Disconnect passenger-side air bag module
connector. (Vehicle with passenger-side air
bag)
• 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.
• Disconnect all SAS unit connectors.
• Are poor connection detector bars of all
SAS unit connectors okay?
Yes
Go to next step.
No Replace wiring harnesses.
3 • Is vehicle equipped with side air bag? Yes
P re s e n t m a lfu n c tio n d ia g n o s is :
• Replace SAS unit.
(See T-59 SAS UNIT REMOVAL/INSTALLATION)
P a st m a lfu n c tio n d ia g n o s is :
• Troubleshooting completed.
No Go to next step.
4
V E R IF Y TH A T S AS u n it CONNECTOR
T E R M IN A L 2 A A IS GROUNDED
• Inspect wiring harness between SAS unit
connector terminal 2AA and ground for
following.
— Short to power supply
— Open circuit
• Is wiring harness okay?
Yes
P re s e n t m a lfu n c tio n d ia g n o s is :
• Replace SAS unit.
(See T-59 SAS UNIT REMOVAL/INSTALLATION)
P a s t m a lfu n c tio n d ia g n o s is :
• Troubleshooting completed.
No Replace wiring harness.
T -6 5