Mazda 2002 6 - No.2 Air Bag System Warning Light Is Illuminated All the Time

T–232
TROUBLESHOOTING
End Of Sie
NO.2 AIR BAG SYSTEM WARNING LIGHT IS ILLUMINATED ALL THE TIME
A6E818001046W03
Diagnostic Procedure
• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while
doing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If
there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and
undamaged.
*3 INSPECT WIRING HARNESS BETWEEN SAS
UNIT AND INSTRUMENT CLUSTER FOR
SHORT TO GROUND
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable.
• Disconnect instrument cluster connector.
• Is there continuity between terminal 1O of
instrument cluster connector and ground?
Yes Replace wiring harness, then go to Step 5.
No Go to next step.
4 INSPECT INSTRUMENT CLUSTER
• Connect instrument cluster connector.
• Connect instrument cluster connector
terminal 1O to ground, then reconnect
connector.
• Connect negative battery cable.
• Does air bag system warning light illuminate
with ignition switch ON?
Yes Replace instrument cluster, then go to next step.
(See T–72 INSTRUMENT CLUSTER REMOVAL/
INSTALLATION)
No Go to next step.
5 CONFIRM THAT MALFUNCTION SYMPTOMS
DO NOT RECUR AFTER REPAIR
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait
for more than 1 minute.
• Connect all SAS unit connectors.
• Connect driver and passenger-side
pre-tensioner seat belt connectors. (Vehicles
with pre-tensioner seat belt)
• Connect driver and passenger-side curtain
air bag module connectors. (Vehicles with
curtain air bag)
• Connect driver and passenger-side side air
bag module connectors. (Vehicles with side
air bag)
• Connect passenger-side air bag module
connector.
• Connect clock spring connector.
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Does air bag system warning light operate
properly?
Yes Complete troubleshooting, then explain repairs to customer.
No Recheck malfunction symptoms, then repeat from Step 1 if
malfunction recurs.
STEP INSPECTION ACTION
2 Air bag system warning light is illuminated all the time.
DETECTION
CONDITION
Malfunction in air bag system warning light circuit (open circuit or short to power supply).
POSSIBLE
CAUSE
• Weak battery
• SAS unit malfunction
• Instrument cluster (print plate) malfunction
• No connection in SAS unit connector
• Poor contact in instrument cluster connector (16-pin)
• Open or short to power supply circuit in wiring harness between instrument cluster and SAS unit
• Poor contact at terminals 1T, 1X and/or 1W of SAS unit connector
• Poor contact in wiring harness between terminal 1X of SAS unit connector and ground
• Poor contact in wiring harness between AIR BAG 15 A fuse and terminal 1W of SAS unit
STEP INSPECTION ACTION
1 INSPECT BATTERY
• Measure voltage of battery.
• Is voltage more than 9 V?
Yes Go to next step.
No Battery is weak.
Inspect charge/discharge system, then go to Step 10.
(See G–4 BATTERY INSPECTION)