Mitsubishi Outlander GS45X. Manual - part 1444

 

  Index      Mitsubishi     Mitsubishi Outlander GS45X - service repair manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  1442  1443  1444  1445   ..

 

 

Mitsubishi Outlander GS45X. Manual - part 1444

 

 

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-271

STEP 4. Check the passenger's seat belt pre-tensioner 
circuit. Measure the voltage at the SRS-ECU connector 
C-27.
(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.

DANGER

To prevent the seat belt pre-tensioner from deploying 
unintentionally, disconnect the passenger’s seat belt 
pre-tensioner connector D-130 to short the squib cir-
cuit.

(3) Disconnect passenger's seat belt pre-tensioner connector 

D-130. Use a flat-tipped screwdriver to unlock the locking 
button at the harness side connector by withdrawing it 
toward you in two stages, and then disconnect the 
connector.

CAUTION

Insert an insulator such as a cable tie to a depth of 4mm 
(0.16 inch) or more, otherwise the short spring will not be 
released.
(4) Insert a cable tie [3 mm (0.12 inch) wide, 0.5 mm (0.02 inch) 

thick] between terminals 43, 44 and the short spring to 
release the short spring.

(5) Connect the negative battery terminal.
(6) Ignition switch: "ON".

(7) Measure the voltage between C-27 harness side connector 

terminals 43, 44 and body ground.
Voltage should measure 1 volt or less.

Q: Is the measured voltage within the specified range?

YES : Erase the diagnostic trouble code memory, and check 

the diagnostic trouble code. If DTC B1C48 sets, 
replace the SRS-ECU (Refer to 

P.52B-436

). Then go 

to Step 6.

NO :  Go to Step 5.

AC507645

A

AC

Lock lever

AC4701631 AB

Seat belt 
pre-tensioner

Locking 
button

Flat-tipped
screwdriver

Floor wiring harness side
connector (2-pin, black)

AC507303AL

A

A

C-27 Harness side
connector (front view)

Section
A - A

Cable tie

Short spring

4 mm or more

Terminal

AC608813

C-27 Harness side 
connector (front view)

CB

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-272

STEP 5. Check the harness wires for short circuit to power 
supply between SRS-ECU connector C-27 (terminal No.43 
and 44) and passenger's seat belt pre-tensioner connector 
D-130 (terminal No.2 and 1).
Q: Is the check result normal?

YES : Go to Step 6.
NO :  Repair the harness wires between SRS-ECU 

connector C-27 and passenger's seat belt 
pre-tensioner connector D-130. Then go to Step 6.

STEP 6. 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 B1C48 set?

YES : Return to Step 1.
NO :  The procedure is complete.

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-273

DTC B1C49: Front Passenger's Seat Belt Pre-tensioner (Squib) System (Squib Circuit Open)

CAUTION

If DTC B1C49 is set in the SRS-ECU, always diag-
nose the CAN main bus line.

.

CIRCUIT OPERATION

The SRS-ECU judges how severe a collision is by 
detecting signals from the front impact sensors and 
the front air bag analog G-sensor. If the impact is 
over a predetermined level, the SRS-ECU sends an 
ignition signal. At this time, if the front air bag safing 
G-sensor is on, the pre-tensioner will deploy. 

.

DTC SET CONDITIONS

This DTC is set if there is abnormal resistance 
between the input terminals of the passenger's seat 
belt pre-tensioner (squib).

.

TROUBLESHOOTING HITS

• Open circuit in the passenger's seat belt pre-ten-

sioner (squib) circuit

• Improper connector contact

• Malfunction of the SRS-ECU

: CONNECTOR
  CONNECTED: ON
  CONNECTOR
  DISCONNECTED: OFF

NOTE

Seat Belt Pre-Tensioner (passenger's side) (Squib) Circuit

SRS-ECU

SEAT BELT 
PRE-TENSIONER 
(RH)

CONNECTOR 
LOCK 
SWITCH

CONNECTOR 
LOCK SWITCH

AC901076

C-27 (Y)

AC

Connector: C-27

AC901079

D-130 (B)

Connector: D-130

AI

SRS AIR BAG DIAGNOSIS

TSB Revision

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-274

DIAGNOSIS

Required Special Tools:

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

• MB991824: Vehicle 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)

• MB991865: Dummy resistor

• MB991884: Resister harness

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

).

ZC501967

AC404789

AC701411AB

MB991824

MB991827

MB991910

Data link 
connector

 

 

 

 

 

 

 

Content   ..  1442  1443  1444  1445   ..