Mazda CX 7. Manual — part 314

ON-BOARD DIAGNOSTIC

08-02–51

08-02

Diagnostic procedure

STEP

INSPECTION

ACTION

1

INSPECT SEAT TRACK POSITION SENSOR
CIRCUIT

• Using the M-MDS, verify the following PID/

DATA monitor.
(See 08-02-8 PID/DATA MONITOR TABLE.)
— TRAK_SW

• Is the seat track position sensor circuit

normal?

Yes

[Present malfunction diagnosis]

• Replace the SAS control module.

(See 08-10-10 SAS CONTROL MODULE REMOVAL/
INSTALLATION.)

[Past malfunction diagnosis]

• DTC troubleshooting completed.

No

Go to the next step.

2

INSPECT WIRING HARNESS BETWEEN
SEAT TRACK POSITION SENSOR AND SAS
CONTROL MODULE

Warning
• Handling the air bag system

components improperly can
accidentally deploy the air bag
modules and pre-tensioner seat belts,
which may seriously injure you. Read
the service warnings and cautions
before handling the air bag system
components.
(See 08-10-3 AIR BAG SYSTEM
SERVICE WARNINGS.)
(See 08-10-5 AIR BAG SYSTEM
SERVICE CAUTIONS.)

• Turn the ignition switch to the LOCK position.

• Disconnect the negative battery cable and

wait for 1 min or more.

• Remove the column cover. (See 09-17-8

COLUMN COVER REMOVAL/
INSTALLATION.)

• Disconnect the clock spring connector.

• Remove the glove compartment.(See 09-17-

8 GLOVE COMPARTMENT REMOVAL/
INSTALLATION.)

• Disconnect the passenger-side air bag

module connector.

• Disconnect the driver and passenger-side

seat connectors.

• Remove the C-pillar trim. (See 09-17-17 C-

PILLAR TRIM REMOVAL/INSTALLATION.)

• Remove the D-pillar trim. (See 09-17-18 D-

PILLAR TRIM REMOVAL/INSTALLATION.)

• Disconnect the driver and passenger-side

curtain air bag module connector.

• Remove the B-pillar lower trim. (See 09-17-

16 B-PILLAR LOWER TRIM REMOVAL/
INSTALLATION.)

• Disconnect the driver and passenger-side

pre-tensioner seat belt connectors.

• Remove the console. (See 09-17-13

CONSOLE REMOVAL/INSTALLATION.)

• Disconnect the SAS control module

connector.

• Disconnect the seat track position sensor

connector

• Inspect the wiring harness between SAS

control module terminal and seat track
position sensor terminals for short to ground,
short to power supply, and open circuit:
— 2W— C

— 2X— A

• Is the wiring harness normal?

Yes

Replace the seat track position sensor, then go to the next
step.

No

Replace wiring harness, then go to the next step.

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ON-BOARD DIAGNOSTIC

08-02–52

End Of Sie

3

INSPECT SAS CONTROL MODULE

• Turn the ignition switch to the LOCK position.

• Connect the SAS control module connector.

• Connect the clock spring connector.

• Connect the passenger-side air bag module

connector.

• Connect the driver-and passenger-side

curtain air bag module connectors.

• Connect the driver-and passenger-side side

air bag module connectors.

• Connect the driver-and passenger-side pre

tensioner seat belt connectors.

• Connect the seat track position sensor

connector.

• Turn the ignition switch to the ON position.

• Are DTCs C1947, C1948 and/or C1981

indicated?

Yes

[Present malfunction diagnosis]

• Replace the SAS control module.

(See 08-10-10 SAS CONTROL MODULE REMOVAL/
INSTALLATION.)

[Past malfunction diagnosis]

• DTC troubleshooting completed.

No

DTC troubleshooting completed.

STEP

INSPECTION

ACTION

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SYMPTOM TROUBLESHOOTING

08-03–1

08-03

08-03

SYMPTOM TROUBLESHOOTING

TROUBLESHOOTING INDEX. . . . . . . . . 08-03–1
NO.1 AIR BAG SYSTEM WARNING

LIGHT DOES NOT ILLUMINATE . . . . . 08-03–1

Diagnostic Procedure. . . . . . . . . . . . . . 08-03–1

NO.2 AIR BAG SYSTEM WARNING

LIGHT ILLUMINATES
CONSTANTLY . . . . . . . . . . . . . . . . . . . . 08-03–3

Diagnostic Procedure . . . . . . . . . . . . . . 08-03–3

End of Toc

WM: AIR BAG SYSTEM

TROUBLESHOOTING INDEX

id080300802000

• Use the chart below verify the symptoms of the trouble in order to diagnose the appropriate area.

End Of Sie

NO.1 AIR BAG SYSTEM WARNING LIGHT DOES NOT ILLUMINATE

id080300800200

Diagnostic Procedure

No.

Troubleshooting item

Description

Page

1

Air bag system warning light does not
illuminate.

Malfunction in air bag system warning
light circuit (short to ground).

(See 08-03-1 NO.1 AIR BAG SYSTEM
WARNING LIGHT DOES NOT
ILLUMINATE)

2

Air bag system warning light is
illuminated constantly.

Malfunction in air bag system warning
light circuit (open circuit or short to
power supply).

(See 08-03-3 NO.2 AIR BAG SYSTEM
WARNING LIGHT ILLUMINATES
CONSTANTLY)

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 control module malfunction

• Instrument cluster (circuit board) malfunction

• Short to ground circuit in wiring harness between instrument cluster and SAS control module

STEP

INSPECTION

ACTION

1

INSPECT OTHER WARNING AND INDICATOR
LIGHTS CIRCUIT IN INSTRUMENT CLUSTER

• Turn the ignition switch to the ON position.

• Do other warning and indicator lights

illuminate?

Yes

Turn the ignition switch to the LOCK position, then go to the
next step.

No

Inspect the instrument cluster power supply system and
ground system, then go to Step 4.

2

INSPECT DTCS IN SAS CONTROL MODULE

• Inspect the DTC for the SAS control module

on-board diagnostic system.

• Have DTCs been recorded in memory?

Yes

Perform the applicable DTC inspection, then go to Step 5.
(See 08-02-4 DTC TABLE.)

No

Go to the next step.

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SYMPTOM TROUBLESHOOTING

08-03–2

3

INSPECT SAS CONTROL MODULE

Warning
• Handling the air bag system

components improperly can
accidentally deploy the air bag
modules and pre-tensioner seat belts,
which may seriously injure you. Read
the air baga system service warnings
and cautions before handling the air
bag system components.
(See 08-10-3 AIR BAG SYSTEM
SERVICE WARNINGS.)
(See 08-10-5 AIR BAG SYSTEM
SERVICE CAUTIONS.)

• Turn the ignition switch to LOCK position.

• Disconnect the negative battery cable and

wait for 1 min or more.

• Remove the column cover. (See 09-17-8

COLUMN COVER REMOVAL/
INSTALLATION.)

• Disconnect the clock spring connector.

• Remove the glove compartment. (See 09-17-

8 GLOVE COMPARTMENT REMOVAL/
INSTALLATION.)

• Disconnect the passenger-side air bag

module connector.

• Disconnect the driver and passenger-side

front seat connectors.

• Remove the C-pillar trim. (See 09-17-17 C-

PILLAR TRIM REMOVAL/INSTALLATION.)

• Remove the D-pillar trim. (See 09-17-18 D-

PILLAR TRIM REMOVAL/INSTALLATION.)

• Disconnect the driver and passenger-side

curtain air bag module connectors.

• Remove the B-pillar lower trim. (See 09-17-

16 B-PILLAR LOWER TRIM REMOVAL/
INSTALLATION.)

• Disconnect the driver- and passenger-side

pre-tensioner seat belt connectors.

• Connect the negative battery cable.

• Turn the ignition switch to ON position.

• Does the air bag system warning light

illuminate?

Yes

Replace the SAS control module, then go to Step 5.
(See 08-10-10 SAS CONTROL MODULE REMOVAL/
INSTALLATION.)

No

Go to the next step.

4

INSPECT DTCS IN INSTRUMENT CLUSTER

• Inspect the DTC for the instrument cluster

on-board diagnostic system.

• Have DTCs been recorded in memory?

Yes

Perform the applicable DTC inspection, then go to the next
step.
(See 09-02E-1 DTC TABLE[INSTRUMENT CLUSTER].)

No

Inspect the instrument cluster warning lights using check
code, then go to the next step.
(See 09-22-5 INSTRUMENT CLUSTER INPUT/OUTPUT
CHECK MODE.)

STEP

INSPECTION

ACTION

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