Mitsubishi 380. Manual - part 774

 

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Mitsubishi 380. Manual - part 774

 

 

SRS AIR BAG DIAGNOSIS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-20

HOW TO READ AND ERASE DIAGNOSTIC 
TROUBLE CODES

Required Special Tools:

•  MB991958: diagnostic tool (MUT-III Sub Assembly)

• MB991824: Vehicle Communication Interface (V.C.I.)

• MB991827: MUT-III USB Cable

• MB991910: MUT-III Main Harness A (Vehicles with CAN 

communication system)

CAUTION

To prevent damage to diagnostic tool MB991958, always 
turn the ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting diagnostic tool 
MB991958.

NOTE: If the battery voltage is low, diagnostic trouble codes will 
not be set. Check the battery if diagnostic tool MB991958 does 
not display.
1. Connect diagnostic tool MB991958 to the data link 

connector.

2. Turn the ignition switch to the "ON" position.

3. Select "Interactive Diagnosis" from the start-up screen.

4. Select "System select."

5. Choose "SRS-AIR BAG".

6. Select "Diagnostic Trouble Code."

7. If a DTC is set, it is shown.

8. Choose "Erase DTCs" to erase the DTC.

SRS WARNING LIGHT CHECK

M1524004300361

1. Check that the SRS warning light illuminates when the 

ignition switch is in the "ON" position.

2. Check that it illuminates for approximately seven seconds 

and then goes out.

3. If not, check for DTC.

00DB076A

MB991910

DATA LINK

CONNECTOR

MB991824

MB991827

SRS AIR BAG DIAGNOSIS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-21

DIAGNOSTIC TROUBLE CODE CHART

M1524003300777

CAUTION

During diagnosis, a DTC code associated with 
another system may be set when the ignition 
switch is turned on with connector(s) discon-
nected. After completing the repair, confirm all 
systems for DTC code(s). If DTC code(s) are set, 
erase them all.
Inspect according to the inspection chart that is 
appropriate for the DTC.

DIAGNOSTIC 
TROUBLE CODE 
NO.

INSPECTION ITEM

REFERENCE PAGE

B1400

*3

Driver's air bag short-circuited

P.52B-24

B1401

*3

Driver's air bag open-circuited

P.52B-32

B1402

*3

Driver's air bag drive circuit (ground side) short-circuited

P.52B-37

B1403

*3

Driver's air bag drive circuit (power supply side) 
short-circuited

P.52B-43

B1404

*3

Driver's air bag activating circuit short-circuited

P.52B-173

B1405

*5

Driver's air bag activating circuit open-circuited

P.52B-173

B1406

*5

G-sensor of front impact sensor (RH) failure

P.52B-49

B1407

*3

Front impact sensor (RH) voltage error

P.52B-51

B1408

*3

Front impact sensor (RH) communication error

P.52B-55

B1409

*3

Front impact sensor (RH) communication impossible

P.52B-55

B1410

*3

Passenger's (front) air bag short-circuited

P.52B-59

B1411

*3

Passenger's (front) air bag open-circuited

P.52B-67

B1412

*3

Passenger's (front) air bag drive circuit (ground side) 
short-circuited

P.52B-72

B1413

*3

Passenger's (front) air bag drive circuit (power supply side) 
short-circuited

P.52B-77

B1414

*5

Passenger's (front) air bag activating circuit short-circuited

P.52B-173

B1415

*5

Passenger's (front) air bag activating circuit open-circuited

P.52B-173

B1416

*5

G-sensor of front impact sensor (LH) failure

P.52B-49

B1417

*3

Front impact sensor (LH) voltage error

P.52B-82

B1418

*3

Front impact sensor (LH) communication error

P.52B-86

B1419

*3

Front impact sensor (LH) communication impossible

P.52B-86

B1420

*3

Side-airbag squib (RH) short-circuited

P.52B-90

B1421

*3

Side-airbag squib (RH) open-circuited

P.52B-97

B1422

*3

Side-airbag squib (RH) drive circuit (ground side) shorted

P.52B-102

B1423

*3

Side-airbag squib (RH) drive circuit (power supply side) 
shorted

P.52B-107

SRS AIR BAG DIAGNOSIS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-22

B1424

*5

Side-airbag squib (RH) drive circuit shorted

P.52B-173

B1425

*5

Side-airbag squib (RH) drive circuit open

P.52B-173

B1426

*5

G-sensor of side impact sensor (RH) failure

P.52B-112

 

B1427

*3

Side impact sensor (RH) voltage error

P.52B-114

B1428

*3

Side impact sensor (RH) communication error

P.52B-118

B1429

*3

Side impact sensor (RH) communication impossible

P.52B-118

B1430

*3

Side-airbag squib (LH) short-circuited

P.52B-122

B1431

*3

Side-airbag squib (LH) open-circuited

P.52B-129

B1432

*3

Side-airbag squib (LH) drive circuit (ground side) shorted

P.52B-134

B1433

*3

Side-airbag squib (LH) drive circuit (power supply side) 
shorted

P.52B-139

B1434

*5

Side-airbag squib (LH) drive circuit shorted

P.52B-173

B1435

*5

Side-airbag squib (LH) drive circuit open

P.52B-173

 

B1436

*5

G-sensor of side impact sensor (LH) failure

P.52B-112

 

B1437

*3

Side impact sensor (LH) voltage error

P.52B-144

B1438

*3

Side impact sensor (LH) communication error

P.52B-148

B1439

*3

Side impact sensor (LH) communication impossible

P.52B-148

 

B1460

*3

Seat belt pre-tensioner 
(RH) squib short-circuited

P.52B-152

B1461

*3

Seat belt pre-tensioner 
(RH) squib open-circuited

P.52B-158

B1462

*3

Seat belt pre-tensioner 
(RH) squib drive circuit (ground side) short-circuited

P.52B-163

B1463

*3

Seat belt pre-tensioner 
(RH) squib drive circuit (power supply side) short-circuited

P.52B-168

B1464

*5

Seat belt pre-tensioner 
(RH) (squib ignition drive circuit) system detected short

P.52B-173

B1465

*5

Seat belt pre-tensioner 
(RH) (squib ignition drive circuit) system detected open

P.52B-173

B1466

*5

Analog G-sensor malfunction

P.52B-173

B1467

*5

Safing G-sensor open-circuited (for frontal collision)

P.52B-173

B1468

*5

Safing G-sensor short-circuited (for frontal collision)

P.52B-173

B1469

*5

Safing G-sensor malfunction (for side collision)

P.52B-173

B1470

*3

Seat belt pre-tensioner 
(LH) squib short-circuited

P.52B-176

 

B1471

*3

Seat belt pre-tensioner 
(LH) squib open-circuited

P.52B-182

 

DIAGNOSTIC 
TROUBLE CODE 
NO.

INSPECTION ITEM

REFERENCE PAGE

SRS AIR BAG DIAGNOSIS

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-23

NOTE: 

*1

: Electrically Erasable Programmable ROM

*2

: This DTC will remain in memory and the SRS warning light will be switched off when the system returns to 

normal condition.

*3

: This DTC will remain in memory and the SRS warning light will be switched on even if the system returns 

to normal condition.

*4

: This DTC will remain in memory when the front passenger's air bag is inactive condition in the event of an 

impact.

*5

: This DTC cannot be erased by "Erase DTCs" function.

B1472

*3

Seat belt pre-tensioner 
(LH) squib (ground side) short-circuited

P.52B-187

 

B1473

*3

Seat belt pre-tensioner 
(LH) squib (power supply side) short-circuited

P.52B-192

B1474

*5

Seat belt pre-tensioner 
(LH) (squib ignition drive circuit) system detected short

P.52B-173

B1475

*5

Seat belt pre-tensioner 
(LH) (squib ignition drive circuit) system detected open

P.52B-173

B1476

*2

Power supply voltage (IG1 (A) voltage) drops abnormally.

P.52B-197

B1477

*2

Power supply voltage (IG1 (B) voltage) drops abnormally.

P.52B-197

B1478

*5

SRS-ECU capacitor circuit voltage too high

P.52B-173

B1479

*5

SRS-ECU capacitor circuit voltage too low

P.52B-173

B1496

*5

SRS-ECU non-volatile memory (EEPROM)

P.52B-173

B1497

*5

SRS-ECU ASIC (for frontal activation)

P.52B-173

B1498

*5

SRS-ECU ROM or RAM

P.52B-173

B1499

*5

Collision decision

P.52B-204

B1509

*2

Incorrect SRS-ECU

P.52B-205

B1519

*3

SRS-ECU connector lock out of order

P.52B-207

B1547

*4*5

Cut OFF for passenger’s front air bag

P.52B-210

B1552

*5

Changing circuit shorted

P.52B-173

B1553

*5

Changing circuit open

P.52B-173

B1554

*5

SG BY-PASS circuit malfunction

P.52B-173

B1555

*5

SG BY-PASS circuit (FET) open

P.52B-173

B1557

*5

SRS-ECU ASIC

P.52B-173

U1073

*2

Bus-off

P.52B-213

DIAGNOSTIC 
TROUBLE CODE 
NO.

INSPECTION ITEM

REFERENCE PAGE

 

 

 

 

 

 

 

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