Mitsubishi Pajero Pinin. Manual — part 308
SRS –
Troubleshooting
52B-11
Code No.14, 15, 16, 17, 31, 32, 45, 51, 52, 54, 55, 56, 57, 58,
59, 73, 74, 83, 84 System inside SRS-ECU
Probable cause
These diagnostic trouble codes are output when a fault is detected in the SRS-ECU.
The defective parts and trouble causes for each diagnosis code No. are as follows.
D
Malfunction of SRS-ECU
Code No.
Defective parts
Trouble causes
14
Analog G-sensor
D
Analog G-sensor is not operating
D
Analog G-sensor characteristics are abnormal
D
Analog G-sensor output is abnormal
15
Front impact safing G-sensor
D
Short circuit in the safing G-sensor
16
D
Open circuit in the safing G-sensor
17
Side impact safing G-sensor
D
Safing G sensor is not operating
D
Safing G sensor characteristics are abnormal
D
Safing G sensor output is abnormal
31
Capacitor
D
Voltage at the capacitor terminal is higher than the specified value
for five seconds or more
32
D
Voltage at the capacitor terminal is lower than the specified value
for five seconds or more (this is not detected if diagnosis code
No.41 or 42 indicating battery voltage drop has been output.)
45
Non-volatile memory (EE-
PROM)
D
Non-volatile memory (EEPROM) is abnormal
51
Driver’s side air bag module
(squib ignition drive circuit)
D
Short circuit in the squib ignition drive circuit
52
(squib ignition drive circuit)
D
Open circuit in the squib ignition drive circuit
54
Front passenger’s side air
bag module (squib ignition
D
Short circuit in the squib ignition drive circuit
55
bag module (squib ignition
drive circuit)
D
Open circuit in the squib ignition drive circuit
56
Driver’s side pre-tensioner
(squib ignition drive circuit)
D
Short circuit in the squib ignition drive circuit
57
(squib ignition drive circuit)
D
Open circuit in the squib ignition drive circuit
58
Front passenger’s side pre-
tensioner (squib ignition drive
D
Short circuit in the squib ignition drive circuit
59
tensioner (squib ignition drive
circuit)
D
Open circuit in the squib ignition drive circuit
73
Side air bag module (R.H.)
(squib ignition drive circuit)
D
Short circuit in the squib ignition drive circuit
74
(squib ignition drive circuit)
D
Open circuit in the squib ignition drive circuit
83
Side air bag module (R.H.)
(squib ignition drive circuit)
D
Short circuit in the squib ignition drive circuit
84
(squib ignition drive circuit)
D
Open circuit in the squib ignition drive circuit
Replace the SRS-ECU.
SRS –
Troubleshooting
52B-12
Code No.21, 22, 61, 62
Driver’s air bag module (squib) system
Probable cause
Abnormal resistance is present between input terminals of driver’s air bag module
(squib). See table below for what each code tells.
However, once trouble is extinguished, SRS-warning lamp will go out. (Diagnosis
code will remain stored)
D
Malfunction of clock spring
D
Partially open as clock spring is not in neutral position
D
Defective wiring harnesses or connectors
D
Malfunction of driver’s air bag module (squib)
D
Malfunction of SRS-ECU
Code No.
Trouble causes
21
D
Short in driver’s air bag module (squib) or harness short
D
Short in clock spring
D
Defective connector*
22
D
Open in driver’s side air bag module (squib) or open harness
D
Open in clock spring
D
Disconnected driver’s air bag module (squib) connector
D
Partially open as clock spring is not in neutral position
D
Poor connector contact*
61
D
Driver’s air bag module (squib) harness shorted to power supply
62
D
Driver’s air bag module (squib) harness short to the earth
NOTE
*:
The shorting bars, which short positive (+) and negative (–) wires to prevent the air bags from accidental deployment
during the disconnection of the connector, are set in the squib circuit connectors. In a defective connector, the short-bar
may be still working even after the connection of the connector.
Check the following connectors: C-32, C-65
Repair
OK
Check trouble symptoms.
NG
Check wiring harness between clock spring and SRS-ECU.
Repair
OK
Replace SRS-ECU.
NO
Check clock spring. (Refer to P.52B-42.)
NG
Replace
NG
NG
Replace driver’s air bag module (squib).
SRS check harness
(MB991613)
Instrument panel
wiring harness
connector (2-pin)
Check harness
MUT-
II
Self-diag code
D
Connect clock spring connector No.1 C-65 and the harness side connector
(2-pin).
D
Remove the cover from the No. 2 connector of the clock spring, and
then insert the probes (MB991222) and connect 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 Nos.21, 22, 61 or 62 displayed?
Resistance (3
Ω
)
2
1
YES
NO
Resistance (3
Ω
)
Check harness
Probe
(MB991222)
Cover
2
SRS –
Troubleshooting
52B-13
Code No.24, 25, 64, 65
Front passenger’s air bag module (squib) system
Probable cause
Abnormal resistance is present between input terminals of front passenger’s air
bag module (squib). See table below for what each code tells.
However, once trouble is extinguished, SRS-warning lamp will go out. (Diagnosis
code will remain stored)
D
Defective wiring harnesses or connectors
D
Malfunction of front passenger’s air bag module
(squib)
D
Malfunction of SRS-ECU
Code No.
Trouble causes
24
D
Short in front passenger’s air bag module (squib) or short harness
25
D
Open in front passenger’s air bag module (squib) or open harness
D
Poor connector contact*
64
D
Short-circuit in front passenger’s air bag module (squib) harness to power supply
65
D
Short-circuit in front passenger’s air bag module (squib) harness to earth
NOTE
*:
The shorting bars, which short positive (+) and negative (–) wires to prevent the air bags from accidental deployment
during the disconnection of the connector, are set in the squib circuit connectors. In a defective connector, the short-bar
may be still working even after the connection of the connector.
NO
YES
Replace the front passenger’s air bag module (squib).
OK
Check trouble symptoms.
NG
Repair
OK
Replace SRS-ECU.
NG
Check wiring harness between the front passenger’s air bag
module and SRS-ECU.
NG
Repair
SRS check harness (MB991613)
Instrument panel wiring harness
Front passenger’s air bag
module connector
MUT-
II
Self-diag code
D
Disconnect front passenger’s air bag module connector C-15,
and connect the harness side connector to SRS check
harness (MB991613) connector No.1.
D
Connect negative (–) battery terminal.
D
Erase diagnosis code memory.
Is code Nos.24, 25, 64 or 65 output?
Resistance (3
Ω
)
1
Check the following connectors: C-15, C-32
SRS –
Troubleshooting
52B-14
Code No.26, 27, 66 or 67 Driver’s side pre-tensioner (squib)
system
Probable cause
These diagnosis codes are output if there is abnormal resistance between the input
terminals of the driver’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 driver’s side pre-tensioner (squib)
D
Malfunction of SRS-ECU
Code No.
Trouble causes
26
D
Short in driver’s side pre-tensioner (squib) or harness short
27
D
Open circuit in driver’s side pre-tensioner (squib) or open harness
D
Malfunction of connector contact
66
D
Short in driver’s side pre-tensioner (squib) harness leading to the power supply
67
D
Short in driver’s side pre-tensioner (squib) harness leading to the earth
Check the following connectors: D-36, D-41 <L.H. drive
vehicles>, D-38 <R.H. drive vehicles>
Repair
OK
Check trouble symptoms.
NG
Check wiring harness between the driver’s side pre-tensioner and
SRS-ECU.
Repair
OK
Replace SRS-ECU.
NG
NG
Replace the driver’s side pre-tensioner.
SRS check harness
(MB991613)
Check harness
MUT-
II
Self-diag code
D
Disconnect the driver’s side pre-tensioner connector D-41 <L.H. drive
vehicles>, D-38 <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.26, 27, 66 or 67 displayed?
Resistance (3
Ω
)
YES
NO
Resistance (3
Ω
)
Check harness
Probe
(MB991222)
Body wiring harness
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