Mitsubishi Pajero Pinin. Manual — part 351
SWS –
Troubleshooting
54B-6
TROUBLESHOOTING
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.
DIAGNOSTIC FUNCTION
DIAGNOSIS CODES CHECK
Use the MUT-
II
to check a diagnosis code.
(Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.)
NOTE
Connect the MUT-
II
to the 16-pin diagnosis connector (black).
INPUT SIGNAL CHECK
1.
Use the MUT-
II
to check a input signal.
(Refer to GROUP 00 – How to Use Troubleshooting/Inspection Service Points.)
2.
In this condition, the following input switches can be checked.
3.
If an abnormality is found during the input signal check, carry out troubleshooting while referring to
the Trouble Symptom Check page.
Input Signal Check Function
Input signal
Buzzer operation condition
Ignition switch (ACC)
Turned from LOCK (OFF) to ACC
Ignition switch (IG1)
Turned from ACC to ON
Key reminder switch
Ignition key removed from ignition key cylinder
(from inserted position)
Hazard warning lamp switch
Turned from OFF to ON
Front fog lamp switch <vehicles with front fog lamp>
Rear fog lamp switch
Back-up lamp switch <M/T>
Shift lever moved to R position
Inhibitor switch (reverse) <A/T>
Selector lever moved to R position
Rear wiper motor auto-stop signal
Rear wiper begins to operate (The input signal
is sent before the rear wiper begins to operate)
Driver’s door switch
Driver’s door opened from closed condition
Door switches
All doors closed to any door opened
Passenger’s door key cylinder switch <vehicles with central door
locking system>
Passenger’s door locked or unlocked using
ignition key
Back door key cylinder switch <vehicles with central door locking
system>
Back door locked or unlocked using ignition key
Driver’s door lock actuator switch <vehicles with central door locking
system>
Driver’s door lock knob moved from lock
position to unlock position or vice versa
SWS –
Troubleshooting
54B-7
Input signal
Buzzer operation condition
Column switch
Tail lamp switch
Turned the lighting switch from OFF to tail lamp
position
Headlamp switch
Turn the lighting switch from tail lamp position to
headlamp position
Dimmer switch
Turned from OFF to ON
Passing switch
Turn-signal lamp switch
Windshield mist wiper switch
Windshield intermittent wiper switch
Windshield low-speed wiper switch
Windshield high-speed wiper switch
Windshield intermittent wiper interval adjusting
knob <vehicles with variable windshield inter-
mittent wiper>
Rotate the windshield intermittent wiper interval
adjusting knob from FAST to SLOW when the
ignition switch is at ON position (The ETACS-
ECU sends a signal around the medium knob
position)
Windshield washer switch
Turned from OFF to ON
Rear wiper switch
Rear washer switch
Headlamp washer switch <vehicles with head-
lamp washer>
Power window
main switch
Any switch <vehicles with power window>
Transmitter
Any switch <vehicles with keyless entry
system>
Multi-center dis-
play
Any switch <vehicles with multi-center display>
DIAGNOSIS CODE CHART
Code No.
Diagnosis item
Reference page
11
Failure concerning the ETACS-ECU
54B-8
12
Failure concerning the column switch or improper connecting with the ETACS-ECU
54B-8
13
Failure concerning the front-ECU
54B-9
21
Short circuit in communication line
54B-10
SWS –
Troubleshooting
54B-8
DIAGNOSIS CODE INSPECTION PROCEDURES
Code No.11 Failure concerning the ETACS-ECU
Probable cause
The ETACS-ECU monitors its own communication data, and sends a diagnosis
code when an error takes place consecutive fifteen times in 0.6 second.
The diagnosis code will be erased when the ETACS-ECU determines that its
own communication data is sent consecutive 15 times in 0.6 second.
D
Malfunction of ETACS-ECU
Replace the ETACS-ECU.
Code No.12 Failure concerning the column switch or
improper connection with the ETACS-ECU
Probable cause
This diagnosis code is displayed when the column switch sends a signal
regardless of the transmission request signal from the ETACS-ECU (three times
or more in one second).
The diagnosis code is erased when the column switch continues to send a
signal according to the transmission request signal from the ETACS-ECU for
one second.
D
Malfunction of column switch
D
Malfunction of ETACS-ECU
D
Malfunction of wiring harness or connector
Is diagnosis code No. 12 output
when the ignition switch is at the
ON position?
No
Measure at column switch connector
C-63.
D
Disconnect connector and
measure at harness side.
D
Voltage between terminal 1 and
body earth.
OK: System voltage
NG
Check the following connectors:
C-01, C-63, C-72, C-75
NG
Check the harness wire between col-
umn switch and fusible link (3).
OK
Check trouble symptoms
NG
Repair
OK
Measure at column switch connector
C-63.
D
Disconnect connector and
measure at harness side.
D
Continuity between terminal 4
and body earth.
OK: Continuity
OK
Check the following connectors:
C-02, C-63, C-83
OK
NG
Repair
NG
Check the harness wire between col-
umn switch and ETACS-ECU.
OK
Check trouble symptoms
NG
Replace the column switch or ETACS-
ECU.
NG
Check the following connectors:
C-01, C-63
NG
Replace
OK
Check trouble symptoms
NG
Check the harness wire between col-
umn switch and body earth.
SWS –
Troubleshooting
54B-9
Code No.13 Failure concerning the front-ECU
Probable cause
This diagnosis code is displayed when the signals that the front-ECU sends to
the ETACS-ECU are errors consecutive fifteen times in 0.6 second.
The diagnosis code will be erased when the front-ECU sends normal signals to
the ETACS-ECU consecutive 15 times in 0.6 second.
D
Malfunction of front-ECU
D
Malfunction of ETACS-ECU
D
Malfunction of wiring harness or connector
Is diagnosis code No. 12 output
when the ignition switch is at the
ON position?
Yes
Measure at front-ECU connector A-37X.
D
Disconnect connector and
measure at harness side.
D
Voltage between terminal 7 and
body earth
OK: System voltage
NG
Check the following connector:
A-37X
NG
Check the harness wire between front-
ECU and fusible link (3).
No
Measure at front-ECU connector A-38X.
D
Disconnect connector and
measure at harness side.
D
Continuity between terminal 31
and body earth.
OK: Continuity
NG
Check the following connector:
A-38X
NG
Repair
OK
Replace the front-ECU.
OK
Check trouble symptoms.
NG
Check the harness wire between front-
ECU and body earth.
OK
Check the following connectors:
A-38X, C-02, C-29, C-83
NG
Repair
NG
Repair
OK
Check trouble symptoms.
OK
Check the trouble symptoms.
NG
Check the harness wire between front-
ECU and ETACS-ECU.
NG
Replace the front-ECU or ETACS-ECU.
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