Mazda 626 - Page 533

TROUBLESHOOTING
STEP
INSPECTION ACTION
*3
CHECK TO SEE WHETHER MALFUNCTION
IS IN WIRING HARNESS (BETWEEN SAS
UNIT AND TNS RELAY FOR SHORT TO B+)
OR 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 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 column cover.
• Disconnect clock spring connector.
• Remove glove compartment. (With
passenger-side air bag)
• Disconnect passenger-side air bag module
connector. (With passenger-side air bag)
• Disconnect driver- and passenger-side side
air bag module connectors. (With side air
bag)
• Remove B-pillar lower trims.
• Disconnect driver-and passenger-side
pre-tensioner seat belt connectors.
• Remove left side side wall.
• Disconnect all SAS unit connectors.
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Measure voltage at terminal 3F of SAS unit
connector.
• Is voltage more than approximately 9 V?
Yes
Replace wiring harness between SAS unit and TNS
relay, then go to Step 5.
No
Replace SAS unit, then go to next step.
(See T-59 SAS UNIT REMOVAL/INSTALLATION)
4
INSPECT TNS SIGNAL CIRCUITS
• Inspect following TNS signal circuit:
— TNS relay
— Combination switch (headlight switch)
— Related wiring harnesses.
• Are they okay?
Yes System is normal now.
No
Replace or repair malfunctioning part(s), then go to
next step.
T-111