Mitsubishi Outlander GS45X. Manual - part 1475

 

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Mitsubishi Outlander GS45X. Manual - part 1475

 

 

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-395

STEP 1. 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 (M.U.T.-III) 

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 2.
NO :  Repair the CAN bus line (Refer to GROUP 54C, 

Diagnosis 

P.54C-17

).

STEP 2. Using scan tool MB991958, read the SRS-ECU 
diagnostic trouble code.
Check again if the DTC is set to the SRS-ECU.
Q: Is the DTC set?

YES : Diagnose the SRS-ECU. Then go to Step 4.
NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, read diagnostic 
trouble code No. U0151 for other system.
Check if the DTC U0151 is set in ETACS-ECU, combination 
meter, A/C-ECU, KOS-ECU or WCM, hands free module, CAN 
box unit, radio and CD player, satellite radio tuner.
Q: Is the DTC set?

YES : Replace the SRS-ECU (Refer to GROUP 52B, 

SRS-ECU 

P.52B-436

).

NO :  Go to Step 4.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-396

STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the occupant classifica-
tion-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the passenger seat cushion frame assembly 

(Refer to GROUP 52A, Front Seat Assembly 

P.52A-17

).

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

).

DTC U0155: Combination Meter CAN Timeout

CAUTION

• If the DTC U0155 is set in the occupant classi-

fication-ECU, always diagnose the CAN main 
bus lines.

• When replacing the ECU, always check that 

the communication circuit is normal.

.

TROUBLE JUDGMENT

If the signal from combination meter cannot be 
received, the occupant classification-ECU sets the 
DTC U0155.

.

JUDGMENT CRITERIA

Because of the CAN-B bus circuit malfunction, if 
occupant classification-ECU becomes unable to per-
form the normal data transmission, occupant classifi-
cation-ECU determines that an abnormality is 
present.

.

TROUBLESHOOTING HINTS

• The CAN bus line may be defective

• The combination meter may be defective

• The occupant classification-ECU may be defec-

tive

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

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

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-397

STEP 1. 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 2.
NO :  Repair the CAN bus line (Refer to GROUP 54C, 

Diagnosis 

P.54C-17

).

STEP 2. Using scan tool MB991958, read the combination 
meter diagnostic trouble code
Check if DTC is set to the combination meter.
Q: Is the DTC set?

YES : Diagnose the combination meter. Then go to Step 4.
NO :  Go to Step 3.

STEP 3. Using scan tool MB991958, read diagnostic 
trouble code No. U0155 for other system.
Check if the DTC U0155 is set in ETACS-ECU, SRS-ECU, 
A/C-ECU, KOS-ECU or WCM, hands free module, CAN box 
unit, radio and CD player, satellite radio tuner.
Q: Is the DTC set?

YES : Replace the combination meter (Refer to GROUP 

54A, Combination Meter  

P.54A-118

).

NO :  Go to Step 4.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-398

STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set to the occupant classifica-
tion-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" 

position.

(3) Check if DTC is set.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?

YES : Replace the passenger seat cushion frame assembly 

(Refer to GROUP 52A, Front Seat Assembly 

P.52A-17

).

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

).

DTC U0164: A/C-ECU CAN Timeout

CAUTION

• If the DTC U0164 is set in the occupant classi-

fication-ECU, always diagnose the CAN main 
bus lines.

• When replacing the ECU, always check that 

the communication circuit is normal.

.

DIAGNOSTIC FUNCTION

If the signal from A/C-ECU cannot be received, the 
occupant classification-ECU sets the DTC U0164.

.

JUDGMENT CRITERIA

Because of the CAN-B bus circuit malfunction, if the 
occupant classification-ECU becomes unable to per-
form the normal data transmission, the occupant 
classification-ECU determines that an abnormality is 
present.

.

TROUBLESHOOTING HINTS

• The CAN bus line may be defective

• The A/C-ECU may be defective

• The occupant classification-ECU may be defec-

tive

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

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

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A (Vehicles with 

CAN communication system)

 

 

 

 

 

 

 

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