Mitsubishi Outlander (2013+). Manual - part 591

 

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Mitsubishi Outlander (2013+). Manual - part 591

 

 

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-15

B1453

*2

Left curtain air bag module (squib) system (shorted to squib circuit 
power supply)

P.52B-76

B1454

*4

Left curtain air bag module (squib) activating circuit short-circuited

P.52B-26

B1455

*4

Left curtain air bag module (squib) activating circuit open-circuited

P.52B-26

B1466

*4

Analog G-sensor Malfunction

P.52B-26

B1476

*3

IG1 power supply open circuit (Fuse No. 16 circuit)

P.52B-26

B1478

*4

SRS-ECU Backup capacitor circuit voltage too High

P.52B-26

B1479

*4

SRS-ECU Backup capacitor circuit voltage too Low

P.52B-26

B1488

*4

Passenger's air bag OFF indicator lamp (short circuit)

P.52B-79

B1489

*2

Passenger's air bag OFF indicator lamp (open circuit)

P.52B-81

B1496

*4

SRS-ECU non-volatile memory (EEPROM

*1

)

P.52B-26

B1498

*4

SRS-ECU abnormal condition in ROM or RAM

P.52B-26

B1499

*4

Air bag deployment determined by SRS-ECU

P.52B-82

B1547

*4

Passenger’s air bag cut off activating Circuit 

P.52B-26

B1557

*4

SRS-ECU application specific integrated circuit

P.52B-26

B1570

*2

Passenger’s air bag cut off switch malfunction

P.52B-82

B1573

*2

Passenger’s air bag cut off switch circuit (power supply side) shorted

P.52B-82

B1574

*2

Passenger’s air bag cut off switch circuit open

P.52B-82

B1575

*2

Passenger’s air bag cut off switch circuit (earth side) shorted

P.52B-82

B1588

*4

SRS-ECU backup capacitor system (Up converter unit) 

P.52B-26

B1589

*4

SRS-ECU backup capacitor system (Down converter unit)

P.52B-26

B1590

*4

SRS-ECU backup capacitor system (capacitance big)

P.52B-26

B1591

*4

SRS-ECU backup capacitor system (capacitance small)

P.52B-26

B1603

*2

Seat belt pre-tensioner (driver’s side) (squib) system (short circuit 
between squib circuit terminals)

P.52B-84

B1604

*2

Seat belt pre-tensioner (driver’s side) (squib) system (open circuit of 
squib circuit)

P.52B-87

B1605

*2

Seat belt pre-tensioner (driver’s side) (squib) system (shorted to 
squib circuit earth)

P.52B-89

B1606

*2

Seat belt pre-tensioner (driver’s side) (squib) system (shorted to 
squib circuit power supply)

P.52B-91

B1607

*4

Seat belt pre-tensioner (driver’s side) activating circuit 
short-circuited

P.52B-26

B1608

*4

Seat belt pre-tensioner (driver’s side) activating circuit 
open-circuited

P.52B-26

B1609

*2

Seat belt pre-tensioner (passenger’s side) (squib) system (short 
circuit between squib circuit terminals)

P.52B-93

B1C49

*2

Seat belt pre-tensioner (passenger’s side) (squib) system (open 
circuit of squib circuit)

P.52B-95

Code No.

Diagnostic item

Reference page

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-16

NOTE: 

.

•

*1

: Electrically Erasable Programmable ROM

•

*2

: This diagnosis code will remain in memory and the SRS warning lamp will be switched on even if the 

system returns to normal condition.

•

*3

: This diagnosis code will remain in memory and the SRS warning lamp will be switched off when the 

system returns to normal condition.

•

*4

: This diagnosis code cannot be erased by "Erase diagnosis codes" function.

B1C47

*2

Seat belt pre-tensioner (passenger’s side) (squib) system (shorted 
to squib circuit earth)

P.52B-97

B1612

*2

Seat belt pre-tensioner (passenger’s side) (squib) system (shorted 
to squib circuit power supply)

P.52B-99

B1613

*4

Seat belt pre-tensioner (passenger’s side) (squib) activating circuit 
short-circuited

P.52B-26

B1614

*4

Seat belt pre-tensioner (passenger’s side) (squib) activating circuit 
open-circuited

P.52B-26

B1631

*2

Driver's knee air bag module (squib) system (short circuit between 
squib circuit terminals)

P.52B-101

B1632

*2

Driver's knee air bag module (squib) system (open circuit between 
squib circuit terminals)

P.52B-103

B1633

*2

Driver's knee air bag module (squib) system (shorted to squib circuit 
earth)

P.52B-101

B1634

*2

Driver's knee air bag module (squib) system (shorted to squib circuit 
power supply)

P.52B-107

B1635

*4

Driver's knee air bag (squib) activating circuit short-circuited

P.52B-26

B1636

*4

Driver's knee air bag module (squib) activating circuit open-circuited

P.52B-26

B1646

Coding data mismatch

P.52B-109

B1647

*4

Passenger’s air bag ON indicator lamp (short circuit)

P.52B-110

B1648

*2

Passenger’s air bag ON indicator lamp (open circuit)

P.52B-111

B1699

*4

SRS-ECU collective deployment

P.52B-112

U0100

Engine CAN timeout 

P.52B-113

U0141

ETACS CAN timeout 

P.52B-114

U1190

*3

No receive fault detect signal

P.52B-114

U1195

*3

Coding not completed

P.52B-115

U1199

Chassis No. not programmed

P.52B-115

U119A

Chassis No. mismatch

P.52B-115

Code No.

Diagnostic item

Reference page

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-17

DIAGNOSIS CODE PROCEDURES

Code No.B1400 Driver's air bag module (squib) system (short circuit between squib circuit terminals)

CAUTION

• If the diagnosis code No. B1400 (squib) is set 

to SRS-ECU, be sure to diagnose the CAN bus 
line.

OPERATION

Only when the frontal impact exceeding the threshold 
is simultaneously detected (turned ON) by the front 
impact sensor as well as by the analogue G-sensor 
in SRS-ECU, the electric current is supplied from 
SRS-ECU to the driver's air bag module (squib).

TROUBLE JUDGEMENT

The code is set when the short circuit occurs to 
between the terminals of SRS-ECU driver's air bag 
module (squib) circuit.

PROBABLE CAUSES

• Damaged short spring 

*

• Short circuit in the clock spring

• Short circuit between terminals of driver's air bag 

module (squib) circuit

• Damaged connector(s)

• Malfunction of SRS-ECU

NOTE:  *: The squib circuit connectors integrate a 
short spring (which prevents the air bags from being 
unintentionally deployed because of static electricity 
by shorting the positive wire to the earth wire in the 
squib circuit when the connectors are disconnected). 
Therefore, when the above codes are set, the short 
spring may not be released due to the damaged con-
nector even when the connectors are connected.

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair the CAN bus line (Refer to GROUP 
54C 

− Troubleshooting ).

STEP 2. Check whether the diagnosis code is 
reset.
(1) Connect the negative battery terminal.
(2) After erasing the diagnosis code memory, check 

the diagnosis code again.

(3) Disconnect the negative battery terminal.

Q: Is the diagnosis code No. B1400 set?

YES : 

Go to Step 3.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunction ).

STEP 3. Connector check: SRS-ECU, clock 
spring, driver's air bag module.
(1) Check that the negative battery terminal is 

disconnected. If the negative battery terminal is 
connected, disconnect it.

AC905015

A

AC

Lock lever

(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. After disconnecting the SRS-ECU 
connector, connect it again.

(3) After disconnecting clock spring, connect it again. 

ACB04316 AB

Driver's air bag module 
harness side connector

Locking button

Flat-tipped
screwdriver

(4) Disconnect the driver's air bag module connector 

using the slotted (-) screwdriver to pull out the 
locking button to the direction of the arrow, and 
connect it again.

(5) Connect the negative battery terminal.
(6) After erasing the diagnosis code memory, check 

the diagnosis code again.

TROUBLESHOOTING

SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

52B-18

(7) Disconnect the negative battery terminal.

Q: Is the diagnosis code No. B1400 set?

YES : 

Go to Step 4.

NO : 

Replace the connector concerned.

STEP 4. Diagnosis check by dummy resistor 
connection.
(1) Check that the negative battery terminal is 

disconnected. If the negative battery terminal is 
connected, disconnect it.

ACB04316 AB

Driver's air bag module 
harness side connector

Locking button

Flat-tipped
screwdriver

(2) Use the flat-tipped screwdriver to pull out the 

locking button of wiring harness side connector, 
and release the lock.

(3) Connect special tool dummy resistor (MB991865) 

to special tool resistor harness (MB991866).

CAUTION

Do not insert a probe directly into the terminal 
from the connector front side as the connector 
contact pressure may be weakened.

AC905251 AC

MB991865 
(Dummy resistor: 3   )

MB991866 
(Resistor harness)

Air bag 
module connector

(4) Insert the resistor harness probe (special tool) as 

shown.

(5) Connect the negative battery terminal.
(6) After erasing the diagnosis code memory, check 

the diagnosis code again.

(7) Disconnect the negative battery terminal.

Q: Is the diagnosis code No. B1400 set?

YES : 

Go to Step 5.

NO : 

Replace the driver's air bag module (Refer 
to 

P.52B-131

)

STEP 5. Diagnosis check by dummy resistor 
connection.
(1) Check that the negative battery terminal is 

disconnected. If the negative battery terminal is 
connected, disconnect it.

(2) Disconnect the clock spring connector.

AC905254 AC

MB991865 
(Dummy resistor: 3   )

MB991866 
(Resistor harness)

Clock spring
connector

(3) Connect special tool dummy resistor (MB991865) 

to special tool resistor harness (MB991866).

CAUTION

Do not insert a probe directly into the terminal 
from the connector front side as the connector 
contact pressure may be weakened.
(4) Insert the resistor harness probe from the back of 

harness side connector DQ1-, DQ1+ line.

(5) Connect the negative battery terminal.
(6) After erasing the diagnosis code memory, check 

the diagnosis code again.

(7) Disconnect the negative battery terminal.

Q: Is the diagnosis code No. B1400 set?

YES : 

Go to Step 6.

NO : 

Replace the clock spring (Refer to 

P.52B-131

).

STEP 6. Resistance measurement at the 
SRS-ECU connector.
(1) Check that the negative battery terminal is 

disconnected. If the negative battery terminal is 
connected, disconnect it.

AC905015

A

AC

Lock lever

(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 

 

 

 

 

 

 

 

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