Mazda 2002 6 - Page 1107

ON-BOARD DIAGNOSTIC [AIR BAG SYSTEM]
T–199
T
Diagnostic procedure
STEP INSPECTION ACTION
1 INSPECT METER IG 15 A FUSE
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable.
• Remove METER IG 15 A fuse.
• Is fuse okay?
Yes Reinstall METER IG 15 A fuse, then go to next step.
No Replace METER IG 15 A fuse.
2 INSPECT FOR CONTINUITY BETWEEN
METER IG 15 A FUSE AND INSTRUMENT
CLUSTER
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Measure voltage at instrument cluster
connector terminal 2V.
• Is voltage more than 9 V?
Yes Go to next step.
No Repair wiring harness.
3 INSPECT WIRING HARNESS BETWEEN
INSTRUMENT CLUSTER 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–117 SERVICE WARNINGS)
• 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 glove compartment.
• Disconnect passenger-side air bag module
connector.
• Disconnect driver and passenger-side
curtain air bag module connectors. (Vehicles
with curtain air bag)
• Disconnect driver and passenger-side side
air bag module connectors. (Vehicles with
side air bag)
• Remove B-pillar lower trims. (Vehicle with
pre-tensioner seat belt)
• Disconnect driver and passenger-side pre-
tensioner seat belt connectors. (Vehicle with
pre-tensioner seat belt)
• Turn up floor covering.
• Disconnect all SAS unit connectors.
• Disconnect instrument cluster.
• Inspect following wiring harness between
SAS unit and instrument cluster terminals for
short to ground, short to power supply, and
open circuit:
— 1T—1O
• Is wiring harness okay?
Yes Go to next step.
No Replace wiring harness.
4 INSPECT AIR BAG SYSTEM WARNING
LIGHT
• Connect instrument cluster.
• Turn ignition switch to ON position.
• Is air bag system warning light illuminated?
Yes Go to next step.
No Replace instrument cluster.
(See T–72 INSTRUMENT CLUSTER REMOVAL/
INSTALLATION)
5 INSPECT AIR BAG SYSTEM WARNING
LIGHT
• Using a jumper wire, cause a short circuit
between instrument cluster terminal 1O and
ground.
• Does air bag system warning light go out?
Yes [Present malfunction diagnosis]
Replace SAS unit.
(See T–124 SAS UNIT REMOVAL/INSTALLATION)
[Past malfunction diagnosis]
Troubleshooting completed.
No Replace instrument cluster.
(See T–72 INSTRUMENT CLUSTER REMOVAL/
INSTALLATION)