Mitsubishi Pajero Pinin. Manual - part 310

SRS – 

Troubleshooting

52B-19

Code No.79 or No.93 
Side impact sensor (L.H.) communication system

Probable cause

These diagnosis code are output if communication between the side impact sensor
(L.H.) and the SRS–ECU is not possible (code No.79) or abnormal (code No.93).

D

Malfunction of wiring harnesses or connectors

D

Malfunction of side impact sensor (L.H.)

D

Malfunction of SRS-ECU

NO

YES

Replace the side impact sensor (L.H.).

OK

Replace the SRS-ECU.

MUT-

II

 Self-diag code

D

Switch over the right side impact sensor (R.H.) and the side
impact sensor (L.H.)

D

Erase diagnosis code memory.

Are code Nos.79 and 93 erased and code Nos.89 and 96 output?

Check the following connectors: D-26, D-36

OK

Check trouble symptoms.

NG

Repair

NG

NG

Repair

Check the harness wire between the side impact sensor (L.H.)
and SRS-ECU.

Code No.81, 82, 85, 86 
Side air bag module (L.H.)  (squib) system

Probable cause

Abnormal resistance is present between input terminals of SRS-ECU for side air
bag module (L.H.) (squib). See table below for what each code tells.
However, as for code Nos. 81 and 82, once trouble is extinguished, SRS warning
lamp will go out. (Diagnosis code will remain stored)

D

Defective wiring harnesses or connectors

D

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

D

Malfunction of SRS-ECU

Code No.

Trouble causes

81

D

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

82

D

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

D

Poor connector contact

85

D

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

86

D

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

SRS – 

Troubleshooting

52B-20

Check the following connectors: D-32, D-36

Repair

OK

Check trouble symptoms.

NG

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

Repair

OK

Replace SRS-ECU.

NG

NG

Replace the seat back assembly (L.H.)

SRS check harness
(MB991613)

Check harness

MUT-

II

 Self-diag code

D

Disconnect the side air bag module (L.H.) connector D-32

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.81, 82, 85 or 86 displayed?

Resistance (3 

Ω

)

YES

NO

Resistance (3 

Ω

)

Check harness

Probe
(MB991222)

Body wiring harness

Code No.89 or No.96 Side impact sensor (R.H.)
communication system

Probable cause

These diagnosis codes are output if communication between the side impact sensor
(R.H.) and the SRS–ECU is not possible (code No.89) or abnormal (code No.96)

D

Malfunction of wiring harnesses or connectors

D

Malfunction of side impact sensor (R.H.)

D

Malfunction of SRS-ECU

NO

YES

Replace the side impact sensor (R.H.).

OK

Replace the SRS-ECU.

MUT-

II

 Self-diag code

D

Switch over the side impact sensor (R.H.) and the side impact
sensor (L.H.).

D

Erase diagnosis code memory.

Are code Nos.89 and 96 erased and code Nos.79 and 93 output?

OK

NG

Repair

NG

NG

Repair

Check the following connectors: D-10, D-36

Check the harness wire between the side impact sensor (L.H.)
and SRS-ECU.

Check trouble symptoms.

SRS – 

Troubleshooting

52B-21

Code No.91 Side impact sensor (L.H.) power supply circuit
system

Probable cause

Power supply voltage of side impact sensor (L.H.) is lower than specified for five
successive seconds or more.
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 side impact sensor (L.H.)

D

Malfunction of SRS-ECU

NG

OK

OK

Replace SRS-ECU.

Measure at side impact sensor (L.H.) connector D-26.

D

Disconnect connector and measure at the harness side.

D

Connect negative (–) battery terminal.

D

Ignition switch: ON

D

Voltage between terminal No.1 and body earth.
OK: 9 V or more

Check the following connectors: D-26, D-36

OK

Check trouble symptoms.

NG

Repair

NG

NG

Repair

Replace side impact sensor (L.H.).

Check harness wire between side impact sensor (L.H.) and SRS-
ECU.

Code No.92, 95 Side impact sensor system

Probable cause

Code No.92 is displayed when malfunction is present inside side impact sensor
(L.H.).
Code No.95 is displayed when malfunction is present inside side impact sensor
(R.H.).
See INSPECTION CHART 6, below, for what each code tells.

D

Malfunction of side impact sensor (L.H.) (Code No.92)

D

Malfunction of side impact sensor (R.H.) (Code No.95)

Code No.

Defective parts

Trouble

92

Side impact analog G-sensor

D

Not working

D

Having abnormal

95

D

Having abnormal

D

Having abnormal output

95

D

Having abnormal output

Replace side impact sensor (L.H.) (code No.92).
Replace side impact sensor (R.H.) (code No.95).

Code No.94 Side impact sensor (R.H.) power supply circuit
system

Probable cause

Power supply voltage of side impact sensor (R.H.) is lower than specified for
successive five seconds or more.
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 side impact sensor (R.H.)

D

Malfunction of SRS-ECU

NG

OK

Replace side impact sensor (R.H.).

OK

Replace SRS-ECU.

Measure at side impact sensor (R.H.) connector D-10.

D

Disconnect connector and measure at harness side.

D

Connect negative (–) battery terminal.

D

Ignition switch: ON

D

Voltage between terminal (1) and body earth
OK: 9 V or more

Check following connectors: C-10, D-31

OK

Check trouble symptoms.

NG

Repair

NG

NG

Repair

Check harness wire between side impact sensor (R.H.) and
SRS-ECU.

SRS – 

Troubleshooting

52B-22

INSPECTION CHART FOR TROUBLE SYMPTOMS

Get an understanding of the trouble symptoms and check according to the inspection procedure chart.

Trouble

Inspection procedure No(s).

Reference page

Communication with MUT-

II

 is impossible.

1

52B-22

SRS warning lamp does not come on.

See diagnosis code No.43.

52B-17

SRS warning lamp does not go out.

See diagnosis code Nos.43, 44.

52B-17

INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS

Inspection Procedure 1

Communication with MUT-

II

 is impossible.

Probable cause

When communication with all systems is impossible, diagnosis circuit is suspected
as faulty.
When only communication with SRS air bags is impossible, open in diagnosis output
circuit or power supply circuit including earth circuit may be present.

D

Defective wiring harness(es) or connector(s)

D

Malfunction of SRS-ECU

Check MUT-

II 

diagnosis circuit, and repair if necessary.

NG

Repair

OK

Check trouble symptoms.

NG

Check harness wire between SRS-ECU and ignition switch IG

1,

repair if necessary.

Check harness wire between SRS-ECU and diagnosis connector.

Replace SRS-ECU.

Check following connectors: B-32, C-35

OK

NG

NG

OK

Check trouble symptoms.

Repair

NG

Repair

No

Can MUT–

II 

communicate with other systems?

Yes

Check following connector: C-32

Check following connectors: C-32, C-74, C-75

(1)NG

Check harness wire between SRS-ECU and earth, and repair
if necessary.

Measure at SRS-ECU connector C-32.

D

Disconnect connector and measure at harness side.

(1) Conductivity between terminal (7) and body earth

OK: Conductive

D

Connect negative (–) battery terminal.

D

Ignition switch: ON

(2) Voltage between terminal (13) and body earth

OK: 9 V or more

(3) Voltage between terminal (16) and body earth

OK: 9 V or more

(2), (3)NG

Check trouble symptoms.

OK

NG

NG

Repair

OK