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Mazda 6. Manual - part 371

TROUBLESHOOTING

T–231

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.

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

T–232 NO.2 AIR BAG SYSTEM

WARNING LIGHT IS ILLUMINATED
ALL THE TIME

)

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).

(See

T–235 NO.3 PASSENGER-SIDE

AIR BAG CUT-OFF INDICATOR
LIGHT DOES NOT ILLUMINATE

)

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).

(See

T–237 NO.4 PASSENGER-SIDE

AIR BAG CUT-OFF INDICATOR
LIGHT IS ILLUMINATED ALL THE
TIME

)

No.

Troubleshooting item

Description

Page

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

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.

Inspect instrument cluster power supply system and ground
system, then go to Step 5.

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

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 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

)

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

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.

Go to next step.

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

)

Go to next step.

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.

Recheck malfunction symptoms, then repeat from Step 1 if
malfunction recurs.

STEP

INSPECTION

ACTION

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

INSPECT BATTERY

• Measure voltage of battery.

• Is voltage more than 9 V?

Yes

Go to next step.

Battery is weak.
Inspect charge/discharge system, then go to Step 10.
(See

G–4 BATTERY INSPECTION

)

TROUBLESHOOTING

T–233

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

T–117 SERVICE WARNINGS

)

• 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.

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.

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.

Go to next step.

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/

INSTALLATION

)

Go to next step.

STEP

INSPECTION

ACTION

T–234

TROUBLESHOOTING

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.

Go to next step.

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.

Repair wiring harnesses, then go to Step 10.

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.

Inspect fuse block, then go to Step 10.

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

)

Replace wiring harnesses, then go to next step.

STEP

INSPECTION

ACTION

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