Mazda 626 - Page 503

ON-BOARD DIAGNOSTIC
STEP
INSPECTION
ACTION
2
INSPECT WIRING HARNESS BETWEEN
DRIVER-SIDE SIDE AIR BAG SENSOR
AND 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.
• Disconnect passenger-side air bag module
connector.
• Disconnect driver and passenger-side side
air bag module connectors.
• Remove B-pillar lower trims.
• Disconnect driver and passenger-side pre-
tensioner seat belt connectors.
• Remove side walls.
• Disconnect all SAS unit connectors.
• Disconnect driver-side side air bag sensor
connector.
• Inspect following wiring harness between
SAS unit and driver-side side air bag
sensor terminals (harness side) for short to
ground, short to power supply, and open
circuit:
— 1B and A
— 1D and B
— 1F and C
— 1E and D
• Are wiring harnesses okay?
Yes
Present malfunction diagnosis:
• Go to next step.
Past malfunction diagnosis:
• Replace driver-side side air bag sensor.
(See T-58 SIDE AIR BAG SENSOR
REMOVAL/INSTALLATION)
No Replace wiring harnesses.
3
INSPECT DRIVER-SIDE SIDE AIR
BAGSENSOR
• Measure resistance between driver-side
side air bag sensor terminal C and D?
• Is resistance approximately 1 ki2?
Yes Go to next step.
No Replace SAS unit.
(See T-59 SAS UNIT REMOVAL/INSTALLATION)
4 VERIFY WHETHER DRIVER-SIDE SIDE AIR
BAG SENSOR IS MALFUNCTIONING OR
NOT
• Connect all SAS unit connectors.
• Connect driver-side side air bag sensor
connector.
• Connect clock spring connector.
• Connect passenger-side air bag module
connector.
• Connect driver- and passenger-side side
air bag module connectors.
• Connect driver and passenger-side
pre-tensioner seat belt connectors.
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Is DTC 25 indicated?
Yes Replace driver-side side air bag sensor, then go to next
step.
(See T-58 SIDE AIR BAG SENSOR
REMOVAL/INSTALLATION)
No
Replace SAS unit.
(See T-59 SAS UNIT REMOVAL/INSTALLATION)
T-81