Mazda 6. Manual — part 371
TROUBLESHOOTING
T–231
T
End Of Sie
NO.1 AIR BAG SYSTEM WARNING LIGHT DOES NOT ILLUMINATE
A6E818001046W02
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.
2
Air bag system warning light is
illuminated all the time.
Malfunction in air bag system warning
circuit (open circuit or short to power
supply).
(See
WARNING LIGHT IS ILLUMINATED
ALL THE TIME
3
Passenger-side air bag cut-off
indicator light does not illuminate.
Malfunction in passenger-side air bag
cut-off indicator light circuit (open
circuit or short to power supply).
AIR BAG CUT-OFF INDICATOR
LIGHT DOES NOT ILLUMINATE
4
Passenger-side air bag cut-off
indicator light is illuminated all the
time.
Malfunction in passenger-side air bag
cut-off indicator light circuit (short to
ground).
AIR BAG CUT-OFF INDICATOR
LIGHT IS ILLUMINATED ALL THE
TIME
No.
Troubleshooting item
Description
Page
1
Air bag system warning light does not illuminate.
DETECTION
CONDITION
Malfunction in air bag system warning light circuit (short to ground)
POSSIBLE
CAUSE
• SAS unit malfunction
• Instrument cluster (print plate) malfunction
• Short to ground circuit in wiring harness between instrument cluster and SAS unit
STEP
INSPECTION
ACTION
1
INSPECT OTHER WARNING AND
INDICATOR LIGHTS CIRCUIT IN
INSTRUMENT CLUSTER
• Turn ignition switch to ON position.
• Do other warning and indicator lights
illuminate?
Yes
Turn ignition switch to LOCK position, then go to next step.
No
Inspect instrument cluster power supply system and ground
system, then go to Step 5.
2
INSPECT 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
• 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 side
air bag module connectors. (Vehicles with
side air bag)
• Disconnect driver and passenger-side
curtain air bag module connectors. (Vehicles
with curtain 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.
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Do air bag system warning light illuminate?
Yes
Replace SAS unit, then go to Step 5.
(See
T–124 SAS UNIT REMOVAL/INSTALLATION
)
No
Go to next step.
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/
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
TROUBLESHOOTING
T–233
T
2
VERIFY THAT SAS unit CONNECTOR IS
CONNECTED
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
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait
for more than 1 minute.
• Turn up floor covering.
• Are all SAS unit connectors securely
connected?
Yes
Go to next step.
No
Reconnect connector properly, then go to Step 10.
* 3
INSPECT WIRING HARNESS BETWEEN SAS
UNIT AND INSTRUMENT CLUSTER FOR
CONTINUITY
• Remove column cover.
• Disconnect clock spring connector.
• Remove glove compartment.
• Disconnect passenger-side air bag module
connector.
• Disconnect driver and passenger-side side
air bag module connectors. (Vehicles with
side air bag)
• Disconnect driver and passenger-side
curtain air bag module connectors. (Vehicles
with curtain 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 connector.
• Is there continuity between SAS unit
connector terminal 1T and instrument cluster
connector terminal 1O?
Yes
Go to next step.
No
Replace wiring harness, then go to Step 10.
* 4
INSPECT WIRING HARNESS BETWEEN SAS
UNIT AND INSTRUMENT CLUSTER FOR
SHORT TO POWER SUPPLY
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Measure voltage at instrument cluster
connector terminal 1O.
• Is voltage more than approximately 9 V?
Yes
Replace wiring harness, then go to Step 10.
No
Go to next step.
5
CHECK TO SEE WHETHER MALFUNCTION
IS IN AIR BAG SYSTEM WARNING LIGHT IN
INSTRUMENT CLUSTER
• Connect instrument cluster connector
terminal 1O to ground, then reconnect
connector.
• Does air bag system warning light illuminate
with ignition switch ON?
Yes
Replace instrument cluster, then go to Step 9.
(See
T–72 INSTRUMENT CLUSTER REMOVAL/
)
No
Go to next step.
STEP
INSPECTION
ACTION
T–234
TROUBLESHOOTING
6
INSPECT POWER SUPPLY CIRCUIT OF SAS
UNIT (TERMINAL 1W)
• 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.
• Inspect voltage for PID/DATA monitor RCM
VOLT item using SST (WDS or equivalent ).
• Is voltage of at least either terminal more
than 9 V?
Yes
Go to Step 9.
No
Go to next step.
7
INSPECT WIRING HARNESS BETWEEN
BATTERY AND FUSE BLOCK
• Remove driver-side front side trim.
• Remove fuse block without disconnecting
connectors.
• Turn ignition switch to ON position.
• Measure voltage at terminals D (JB–01) of
fuse block connector.
• Is voltage of at least either terminal more
than 9 V?
Yes
Go to next step.
No
Repair wiring harnesses, then go to Step 10.
8
INSPECT WIRING HARNESS BETWEEN
FUSE BLOCK AND SAS UNIT
• Measure voltage at terminals G (JB–03) of
fuse block connector.
• Is voltage of at least either terminal more
than 9 V?
Yes
Repair wiring harnesses, then go to Step 10.
No
Inspect fuse block, then go to Step 10.
9
VERIFY THAT SAS UNIT CONNECTOR
TERMINAL 1X IS GROUND
• 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 side
air bag module connectors. (Vehicles with
side air bag)
• Disconnect driver and passenger-side
curtain air bag module connectors. (Vehicles
with curtain air bag)
• Remove B-pillar lower trim. (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.
• Inspect wiring harness between SAS unit
connector terminal 1X and ground for
following:
— Short to power supply
— Open circuit
• Is wiring harness okay?
Yes
Replace SAS unit, then go to next step.
(See
T–124 SAS UNIT REMOVAL/INSTALLATION
No
Replace wiring harnesses, then go to next step.
STEP
INSPECTION
ACTION
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