Mazda Protege 5. Manual - part 288

ON-BOARD DIAGNOSTIC 

08–02–20

DTC 25

A3U080201046W12

Diagnostic procedure

DTC 25

Driver-side side air bag sensor system (Communication error)

DETECTION 

CONDITION

Warning

••••

Detection conditions are for understanding DTC outline before performing inspection. 
Performing inspection with only detection conditions may cause injury due to operating error 
or damage the system. When performing inspection, always follow diagnostic procedure.

Note

•

For vehicles without side air bag, DTC 22, 25, 26, 32, 35, or 37 may be indicated concurrently. In 
such a case, perform only the smallest DTC troubleshooting among them.

Vehicles with side air bag

•

Malfunction in wiring harness between driver-side side air bag sensor and SAS control module.

•

Malfunction in driver-side side air bag sensor circuit.

Vehicles without side air bag

•

Terminal 2AA of SAS control module connector is open.

POSSIBLE 

CAUSE

Vehicles with side air bag

•

Driver-side side air bag sensor malfunction.

•

Open or short circuit in wiring harness between driver-side side air bag sensor and SAS control 
module.

•

SAS control module malfunction.

Vehicles without side air bag

•

Malfunction of connector between SAS control module and ground.

•

Open or short circuit in wiring harness between SAS control module and ground.

•

SAS control module malfunction.

STEP

INSPECTION

ACTION

1

•

Is vehicle equipped with side air bag?

Yes

Go to next step.

No

Go to Step 5.

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ON-BOARD DIAGNOSTIC 

08–02–21

08–02

2

INSPECT WIRING HARNESS BETWEEN 
DRIVER-SIDE SIDE AIR BAG SENSOR AND 
SAS CONTROL MODULE

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 08–10–3 AIR BAG SYSTEM 
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.

•

Remove B-pillar lower trims.

•

Disconnect driver-and passenger-side pre-
tensioner seat belt connectors.

•

Remove left side side wall.

•

Disconnect all SAS control module 
connectors.

•

Disconnect driver-side side air bag sensor 
connector.

•

Inspect following wiring harness between 
SAS control module connector and driver-
side side air bag sensor connector terminals 
(harness side) for short to ground, short to 
power suppiy, and open circuit:
— 1B and A
— 1D and B
— 1F and C
— 1E and D

•

Are wiring harnesses okay?

Yes

Present malfunction diagnosis:

•

Go to next step.

Past malfunction diagnosis:

•

Replace SAS control module.
(See 08–10–12 SAS CONTROL MODULE REMOVAL/
INSTALLATION

No

Replace wiring harness.

3

INSPECT DRIVER-SIDE SIDE AIR BAG 
SENSOR

•

Measure resistance between terminals C 
and D of driver-side side air bag sensor.

•

Is resistance approximately 1 kilohm?

Yes

Replace SAS control module, then go to next step.
(See 08–10–12 SAS CONTROL MODULE REMOVAL/
INSTALLATION

No

Replace driver-side side air bag sensor.
(See 08–10–10 SIDE AIR BAG SENSOR REMOVAL/
INSTALLATION)

4

VERIFY WHETHER DRIVER-SIDE SIDE AIR 
BAG SENSOR IS MALFUNCTIONING OR NOT

•

Connect all SAS control module connectors 
and driver-side side air bag sensor 
connector.

•

Connect clock spring connector. Connect 
passenger-side air bag module connector.

•

Connect driver- and passenger-side side air 
bag module connectors.

•

Connect driver- and passenger-side pre-
tensioner seat belt connectors.

•

Connect negative battery cable.

•

Turn ignition switch to ON position.

•

Is DTC 25 indicated?

Yes

Replace driver-side side air bag sensor.
(See 08–10–10 SIDE AIR BAG SENSOR REMOVAL/
INSTALLATION)

No

Complete inspection by DTC.

STEP

INSPECTION

ACTION

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ON-BOARD DIAGNOSTIC 

08–02–22

End Of Sie

DTC 26

A3U080201046W13

5

VERIFY THAT SAS CONTROL MODULE 
CONNECTOR TERMINAL 2AA IS GROUNDED

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 08–10–3 AIR BAG SYSTEM 
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.

•

Remove B-pillar lower trims.

•

Disconnect driver-and passenger-side pre-
tensioner seat belt connectors.

•

Remove left side side wall.

•

Disconnect all SAS control module 
connectors.

•

Disconnect driver-side side air bag sensor 
connector.

•

Inspect wiring harness between terminal 
2AA of SAS control module connector and 
ground for following.
— Short to power supply
— Open circuit

•

Is wiring harnesses okay?

Yes

Present malfunction diagnosis:

•

Replace SAS control module.
(See 08–10–12 SAS CONTROL MODULE REMOVAL/
INSTALLATION)

Past malfunction diagnosis:

•

Complete inspection by DTC.

No

Replace wiring harness.

STEP

INSPECTION

ACTION

DTC 26

Driver-side side air bag module system

DETECTION 

CONDITION

Warning

••••

Detection conditions are for understanding DTC outline before performing inspection. 
Performing inspection with only detection conditions may cause injury due to operating error 
or damage the system. When performing inspection, always follow diagnostic procedure.

Note

•

For vehicles without side air bag, DTC 22, 25, 26, 32, 35, or 37 may be indicated concurrently. In 
such a case, perform only the smallest DTC troubleshooting among them.

Vehicles with side air bag

•

Resistance detected between terminals 1A and 1C of SAS control module is other than 1.63—2.71 
ohm.

•

Short circuit in wiring harness related terminal 1A or 1C of SAS control module.

Vehicles without side air bag

•

Terminal 2AA of SAS control module connector is open.

POSSIBLE 

CAUSE

Vehicles with side air bag

•

Driver-side side air bag module malfunction.

•

Malfunction of connectors between driver-side side air bag module and SAS control module.

•

Open or short circuit in wiring harness between driver-side side air bag module and SAS control 
module.

•

SAS control module malfunction.

Vehicles without side air bag

•

Malfunction of connector between SAS control module and ground.

•

Open or short circuit in wiring harness between SAS control module and ground.

•

SAS control module malfunction.

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ON-BOARD DIAGNOSTIC 

08–02–23

08–02

Diagnostic procedure

STEP

INSPECTION

ACTION

1

•

Is vehicle equipped with side air bag?

Yes

Go to next step.

No

Go to Step 5.

2

INSPECT SEPARATOR* OF DRIVER-SIDE 
SIDE AIR BAG MODULE CONNECTOR

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 08–10–3 AIR BAG SYSTEM 
SERVICE WARNINGS)

•

Turn ignition switch to LOCK position.

•

Disconnect negative battery cable and wait 
for more than 1 minute.

•

Disconnect driver-side side air bag module 
connector.

•

Is separator* of driver-side side air bag 
module connector okay?

Yes

Present malfunction diagnosis:

•

Go to next step.

Past malfunction diagnosis:

•

Go to Step 3.

No

Replace wiring harness.

3

VERIFY WHETHER MALFUNCTION IS IN 
DRIVER-SIDE SIDE AIR BAG MODULE OR 
OTHER PARTS

•

Connect leads of SST (Fuel And 
Thermometer checker) or apply 2 ohms 
resistor to driver-side side air bag module 
connector terminals A and B.

•

Set resistance of SST (Fuel And 
Thermometer checker) to 2 ohms.

•

Connect negative battery cable.

•

Turn ignition switch to ON position.

•

Is DTC 26 indicated?

Yes

Go to next step.

No

Replace driver-side side air bag module.
(See 08–10–7 SIDE AIR BAG MODULE REMOVAL/
INSTALLATION)

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