Mitsubishi Outlander GS45X. Manual - part 1448

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-287

STEP 7. Using scan tool MB991958, diagnose the CAN bus 
line.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958. Refer to "How to connect the 

scan tool 

P.52B-28

."

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?

YES : Go to Step 8.
NO :  Repair the CAN bus line (Refer to GROUP 54C, 

Diagnosis 

P.54C-17

).

STEP 8. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Go to Step 9.
NO :  There is an intermittent malfunction such as poor 

engaged connector(s) or open circuit (Refer to 
GROUP 00, How to Cope with Intermittent 
Malfunction 

P.00-15

).

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-288

STEP 9. Check the harness for open circuit between 
SRS-ECU connector C-27 (terminal No.61 and 62) and the 
ETACS-ECU connector C-313 (terminal No.4 and 2).
(1) Disconnect the negative battery terminal.
(2) While pushing the part "A" indicated in the figure of the 

harness side connector, turn the lock lever to the direction 
of the arrow to release the lock lever, and disconnect the 
C-27 SRS-ECU connector.

(3) Disconnect the ETACS-ECU connector C-313.

(4) Check for continuity between the following terminals. It 

should be less than 2 ohms.

<Fuse No.12>

• SRS-ECU connector C-27 (terminal No.62) and the 

ETACS-ECU connector C-313 (terminal No.2)

<Fuse No.18>

• SRS-ECU connector C-27 (terminal No.61) and the 

ETACS-ECU connector C-313 (terminal No.4)

Q: Does continuity exist?

YES : Go to Step 10.
NO :  Repair the harness wire between SRS-ECU 

connector C-27 and the ETACS-ECU connector 
C-313.

STEP 10. Measure the voltage at the C-27 SRS-ECU 
connector.
(1) Disconnect the negative battery terminal.
(2) While pushing the part "A" indicated in the figure of the 

harness side connector, turn the lock lever to the direction 
of the arrow to release the lock lever, and disconnect the 
C-27 SRS-ECU connector.

(3) Connect the negative battery terminal.
(4) Ignition switch: ON

AC507645

A

AC

Lock lever

AC608812DO

C-27 Harness 
side connector 
(front view)

C-313 Harness side 

connector (front view)

AC507645

A

AC

Lock lever

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-289

(5) Take the measurements below at the C-27 harness side 

connector. 

• Voltage between terminal No. 61/62 and body ground

OK: 9 V or more

Q: Is the measured voltage within the specified range?

YES : Go to Step 11.
NO :  Replace the ETACS-ECU (Refer to GROUP 54A, 

ETACS-ECU 

P.54A-826

).

STEP 11. Recheck for diagnostic trouble code.
Check again if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to the "ON" position.
(3) Check if the DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC B210D set?

YES : Replace the SRS-ECU (Refer to 

P.52B-436

).

NO :  There is an intermittent malfunction such as poor 

engaged connector(s) or open circuit (Refer to 
GROUP 00, How to Cope with Intermittent 
Malfunction 

P.00-15

).

AC608813

C-27 Harness side 
connector (front view)

BQ

SRS AIR BAG DIAGNOSIS

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SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-290

DTC B212C: Open Circuit to IG1 Power Supply (Fuse No.12 Circuit)

 

DTC B212D: Open Circuit to IG1 Power Supply (Fuse No.18 Circuit)

CAUTION

If DTC B212C (Fuse No.12) or B212D (Fuse No.18) 
is set in the SRS-ECU, always diagnose the CAN 
main bus lines.

.

CIRCUIT OPERATION

• The SRS-ECU is powered from the fusible link 

(34).

IG1
RELAY

AC803172

SRS-ECU

AB

FUSIBLE
LINK

34

IGNITION
SWITCH (IG1)

IG1 Power Supply Circuit

ETACS-ECU

POWER 
SUPPLY

AC901076

C-27 (Y)

AC

Connector: C-27

ACA02655AI

Connector: C-313

C-313 (BR)