Mitsubishi Pajero Pinin. Manual - part 307

SRS – 

Special Tools/Test Equipment

52B-7

Tool

Use

Name

Number

MR372530

SRS air bag 
adapter harness

Deployment of driver’s side air bag module
inside the vehicle

MB686560

SRS air bag 
adapter harness

Deployment of front passenger’s side air bag
module inside or outside the vehicle

MR203491 or
MB628919

SRS air bag 
adapter harness

Deployment of driver’s side air bag module
outside the vehicle

TEST EQUIPMENT

Tool

Name

Use

Digital multi-meter

Checking the SRS electrical circuitry

Use a multi-meter for which the maximum
test current is 2 mA or less at the minimum
range of resistance measurement

SRS – 

Troubleshooting

52B-8

TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.

DIAGNOSIS FUNCTION

DIAGNOSIS CODES CHECK

Connect the MUT-

II

 to the diagnosis connector (16-pin) under the instrument under cover, then check

diagnosis codes.
(Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.)

ERASING DIAGNOSIS CODE

Connect the MUT-

II

 to the diagnosis connector and erase the diagnosis code.

Caution
Turn off the ignition switch before connecting or disconnecting the MUT-

II.

SRS WARNING LAMP INSPECTION

1.

Check to be sure that the SRS warning lamp illuminates
when the ignition switch is in the ON position.

2.

Check to be sure that it illuminates for approximately 7
seconds and then switches off.

3.

If the above is not the cause, inspect the diagnosis codes.

INSPECTION CHART FOR DIAGNOSIS CODES

Inspect according to the inspection chart that is appropriate for the malfunction code.

Code No.

Diagnosis item

Reference page

11, 12, 13

Front impact sensor system

52B-10

14

Analog G-sensor system in the SRS-ECU

52B-11

15,16

Front impact safing G-sensor system inside SRS-ECU

52B-11

17

Side impact safing G-sensor system inside SRS-ECU

52B-11

21*

2

, 22*

2

, 61*

2

, 62*

2

Driver’s side air bag module (squib) system

52B-12

24*

2

, 25*

2

, 64*

2

, 65*

2

Front passenger’s side air bag module (squib) system

52B-13

26*

2

, 27*

2

, 66, 67

Driver’s side pre-tensioner (squib) system

52B-14

28*

2

, 29*

2

, 68, 69

Front passenger’s side pre-tensioner (squib) system

52B-15

31, 32

SRS-ECU capacitor system

52B-11

34*

1

Connector lock system

52B-16

35

SRS-ECU (deployed air bag) system

52B-16

SRS warning lamp

SRS – 

Troubleshooting

52B-9

Code No.

Reference page

Diagnosis item

41*

1

Power circuit system (fuse No.6 circuit)

52B-16

42*

1

Power circuit system (fuse No.8 circuit)

52B-16

43*

1

SRS warning lamp drive circuit
system

Lamp does not illuminate.

52B-17

system

Lamp does not switch off.

52B-17

44*

1

SRS warning lamp drive circuit system

52B-17

45

Internal circuit system of non-volatile memory (EEPROM) inside
SRS-ECU

52B-11

51, 52

Driver’s side air bag module (squib ignition drive circuit) system

52B-11

54, 55

Front passenger’s side air bag module (squib ignition drive circuit)
system

52B-11

56, 57

Driver’s side pre-tensioner (squib ignition drive circuit) system

52B-11

58, 59

Front passenger’s side pre-tensioner (squib ignition drive circuit) system

52B-11

71*

2

, 72*

2

, 75, 76

Side air bag module (R.H.) (squib) system

52B-18

73, 74

Side air bag module (R.H.) (squib ignition drive circuit) system

52B-11

79, 93

Side impact sensor (L.H.) communication system

52B-19

81*

2

, 82*

2

, 85, 86

Side air bag module (L.H.) (squib) system

52B-19

83, 84

Side air bag module (L.H.) (squib ignition drive circuit) system

52B-11

89, 96

Side impact sensor (R.H.) communication system

52B-20

91*

1

Side impact sensor (L.H.) power supply circuit system

52B-21

92

Side impact sensor (L.H.) system

52B-21

94*

1

Side impact sensor (R.H.) power supply circuit system

52B-21

95

Side impact sensor (R.H.) system

52B-21

NOTE
(1) *

1

: If the vehicle condition returns to normal, the diagnosis code will be automatically erased, and the SRS warning

lamp will return to normal.

(2) *

2

: If the trouble(s) are extinguished, the SRS warning lamp go out with diagnosis code history stored.

(3) If the vehicle has a discharged battery it will store the diagnosis codes 41 or 42. When these diagnosis codes are

displayed, check the battery.

SRS – 

Troubleshooting

52B-10

INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE

Code No.11, 12 or 13 Front impact sensor system

Probable cause

These diagnostic trouble codes are output if there is abnormal resistance between
the input terminals of the front impact sensors.
The trouble causes for each diagnosis code No. are as follows.

D

Malfunction of front impact sensor

D

Malfunction of wiring harness of connectors

D

Malfunction of SRS-ECU

Code No.

Trouble Symptom

11

D

Short circuit in front impact sensor or harness

D

Short circuit in front impact sensor harness leading to the vehicle body ground

D

Short circuit in front impact sensor harness leading to the power supply

12

D

Open circuit in either left or right front impact sensor or harness

D

Short circuit in front impact sensor harness leading to the power supply

13

D

Open circuit in both left or right front impact sensor or harness

D

Short circuit in front impact sensor harness leading to the power supply

Front impact sensor check. (Refer to P.52B-33)

NG

OK

OK

Measure at SRS-ECU connector C-32.

D

Disconnect the connector and measure at the harness side.

D

Connect negative (–) battery terminal.

D

Ignition switch: ON

D

Resistance between terminal 1 and 2
OK: 820 

±

 82 

Ω

D

Resistance between terminal 3 and 4
OK: 820 

±

 82 

Ω

NG

Replace the SRS-ECU.

Check trouble symptoms.

Repair

Check the harness wire between the SRS-ECU and front impact
sensor

,

 and repair if necessary.

NG

Check the following connectors:
A-51, A-49, C-28, C-32