Mitsubishi Pajero Pinin. Manual - part 309

SRS – 

Troubleshooting

52B-15

Code No.28, 29, 68 or 69 Front passenger’s side
pre-tensioner (squib) system

Probable cause

These diagnosis codes are output if there is abnormal resistance between the input
terminals of the front passenger’s side pre-tensioner (squib).
The trouble causes for each diagnosis code No. are as follows.

D

Malfunction of wiring harnesses or connectors

D

Malfunction of front passenger’s side pre-tensioner
(squib)

D

Malfunction of SRS-ECU

Code No.

Trouble causes

28

D

Short in front passenger’s side pre-tensioner (squib) or harness short

29

D

Open circuit in front passenger’s side pre-tensioner (squib) or open harness

D

Malfunction of connector contact

68

D

Short in front passenger’s side pre-tensioner (squib) harness leading to the power
supply

69

D

Short in front passenger’s side pre-tensioner (squib) harness leading to the earth

Repair

OK

Check trouble symptoms.

NG

Check wiring harness between the front passenger’s side pre-ten-
sioner and SRS-ECU.

Repair

OK

Replace SRS-ECU.

NG

NG

Check the following connectors: D-36, D-38 <L.H. drive
vehicles>, D-41 <R.H. drive vehicles>

Replace the front passenger’s side pre-tensioner.

SRS check harness
(MB991613)

Check harness

MUT-

II

 Self-diag code

D

Disconnect the front passenger’s side pre-tensioner connector D-38 <L.H.
drive vehicles>, D-41 <R.H. drive vehicles>

D

Insert the probe (MB991222) from the rear of the harness side connector
and connect the check harness to the probe.

Caution
Never insert the probe directly to the terminals from the front of
the connector.

D

Disconnect the resistance connector from the SRS check harness
(MB991613) and connect to the check harness.

D

Connect the negative (–) battery terminal.

D

Erase diagnosis code memory.

Is code No.28, 29, 68 or 69 displayed?

Resistance (3 

Ω

)

YES

NO

Resistance (3 

Ω

)

Check harness

Probe
(MB991222)

Body wiring harness

SRS – 

Troubleshooting

52B-16

Code No.34 Connector lock system

Probable cause

SRS-ECU is poorly connected. 
However, when vehicle condition returns to normal, this code will be automatically
erased, and the SRS warning lamp will go out.

D

Defective connectors

D

Malfunction of SRS-ECU

Yes

Repair

OK

Replace SRS-ECU.

Check the following connectors: C-32

NG

Is SRS-ECU connector C-32 connected properly?

Repair

No

Code No.35 SRS-ECU (deployed air bag) system

Probable cause

This code is displayed after deployment of air bags. If displayed before deployment,
the code indicates malfunction probably present in SRS-ECU.

D

Malfunction of SRS-ECU

Replace the SRS-ECU.

Code No.41 Power circuit system (fuse No.6 circuit)

Probable cause

Code No.42 Power circuit system (fuse No.8 circuit)

Code No.41 is displayed if voltage between IG

1

 terminal (SRS–ECU, terminal 12)

and earth is lower than specified for five successive seconds or more.
Code No.42 is displayed if voltage between IG

1

 terminal (SRS–ECU, terminal 9)

and earth is lower than specified for five successive seconds or more.
However, once trouble is extinguished, these codes will be automatically erased,
and SRS warning lamp will go out.
If  codes 41 and 42 are displayed together, check the battery first as vehicle may
have discharged battery.

D

Defective wiring harnesses or connectors

D

Malfunction of SRS-ECU

NG

OK

OK

Measure at SRS-ECU connector C-32.

D

Disconnect connector, and measure at harness side.

D

Connect negative (–) battery terminal.

D

Ignition switch: ON

D

Voltage between terminal 16 and body earth (code No.41)
OK: 9 V or more

D

Voltage between terminal 13 and body earth (code No.42)
OK: 9 V or more

NG

Replace SRS-ECU.

Check trouble symptoms.

Repair

Check harness wire between SRS-ECU and ignition switch IG

1.

Repair if necessary.

NG

Check the following connectors: C-32, C-75, C-76

SRS – 

Troubleshooting

52B-17

Code No.43 SRS warning lamp drive circuit system 
(Lamp does not come on)

Probable cause

Open circuit is present for 5 successive seconds or more in SRS warning lamp
drive circuit.
However, once trouble is extinguished, this code, if displayed due to open circuit,
will be automatically erased.

D

Defective wiring harnesses or connectors

D

Blown bulb

D

Malfunction of SRS-ECU

D

Malfunction of combination meter

OK

NG

Check bulb for being blown.

Replace SRS-ECU.

OK

Replace combination 
meter.

Check SRS warning lamp.

D

Connect negative (–) battery terminal.

D

Ignition switch: ON

D

Does lamp come on when SRS-ECU connector C-32 is
disconnected?
OK: Lamp illuminates

OK

Check trouble symptoms.

NG

Repair

NG

NG

Repair

OK

NG

Repair

Check the following connectors: C-02, C-06, C-07, C-32

Check wiring harness  between SRS-ECU, combination meter
and ignition switch IG

1.

Code No.43 SRS warning lamp drive circuit system
(Lamp does not go out.)

Probable cause

Harness between SRS warning lamp and SRS-ECU is being shorted to earth.
However, once trouble is extinguished, this code will be automatically erased, and
SRS warning lamp will go out.

D

Defective wiring harnesses or connectors

D

Malfunction of SRS-ECU

D

Malfunction of combination meter

NO

NO

Replace SRS-ECU.

OK

Replace SRS-ECU.

Check SRS warning lamp.

D

Connect negative (–) battery terminal.

D

Ignition switch: ON

D

Does lamp go out when combination meter connector C-07
is disconnected?

Check the following connectors: C-07, C-32

OK

Check trouble symptoms.

NG

Repair

Check wiring harness between SRS-ECU and combination meter

.

NG

NG

Repair

Code No.44 SRS warning lamp drive circuit system

Probable cause

Short is present in SRS warning lamp drive circuit, or output transistor in SRS-ECU
is defective.
However, once trouble is extinguished, this code will be automatically erased, and
SRS warning lamp will go out.

D

Defective wiring harnesses or connectors

D

Malfunction of SRS-ECU

Check SRS warning lamp drive circuit system. 
(Refer to P.52B-17)

OK

Replace SRS-ECU.

SRS – 

Troubleshooting

52B-18

Code No.71, 72, 75, 76 
Side air bag module (R.H.)  (squib) system

Probable cause

Abnormal resistance is present between input terminals of SRS-ECU for side air
bag module (R.H.) (squib). See table below for what each code tells.
However, as for code Nos. 71 and 72, once trouble is extinguished, SRS warning
lamp will go out. (Diagnosis code will remain stored)

D

Malfunction of wiring harnesses or connectors

D

Malfunction of side air bag module (R.H.) (squib)

D

Malfunction of SRS-ECU

Code No.

Trouble causes

71

D

Short in side air bag module (R.H.) (squib) or harness short

72

D

Open in side air bag module (R.H.) (squib) or open harness

D

Poor connector contact

75

D

Side air bag module (R.H.) (squib) harness short to power supply

76

D

Side air bag module (R.H.) (squib) harness short to earth

Check the following connectors: D-01, D-36

Repair

OK

Check trouble symptoms.

NG

Check wiring harness between the side air bag module (R.H.)
and SRS-ECU.

Repair

OK

Replace SRS-ECU.

NG

NG

Replace the seat back assembly (R.H.)

SRS check harness
(MB991613)

Check harness

MUT-

II

 Self-diag code

D

Disconnect the side air bag module (R.H.) connector D-01

D

Insert the probe (MB991222) from the rear of the harness side connector
and connect the check harness to the probe.

Caution
Never insert the probe directly to the terminals from the front of
the connector.

D

Disconnect the resistance connector from the SRS check harness
(MB991613) and connect to the check harness.

D

Connect the negative (–) battery terminal.

D

Erase diagnosis code memory.

Is code No.71, 72, 75 or 77 displayed?

Resistance (3 

Ω

)

YES

NO

Resistance (3 

Ω

)

Check harness

Probe
(MB991222)

Body wiring harness