Mitsubishi Pajero Pinin. Manual — part 66
GDI –
Troubleshooting
13A-13
Code No.
Reference page
Diagnosis item
P1221
Throttle valve position feedback system
13A-55
P1223
Communication line with throttle valve controller
13A-56
P1224
Throttle valve control servo motor (motor 1st phase malfunction) system
13A-57
P1225
Accelerator pedal position sensor (2nd channel) system
13A-58
P1228
Throttle valve control servo motor (motor 2nd phase malfunction) system
13A-60
P1500
Alternator FR terminal system
13A-61
P1515
Brake vacuum sensor system
13A-62
P1600
Communication wire with A/T-ECU system
13A-64
P1610
Immobilizer system
13A-64
NOTE
1.
Do not replace the engine-ECU until a through terminal check reveals there are no short/open circuit.
2.
Check that the engine-ECU earth circuit is normal before checking for the cause of the problem.
3.
After the engine-ECU has detected a malfunction, a diagnosis code is recorded the next time the
engine is started and the same malfunction is re-detected. However, for items marked with a “
”,
the diagnosis code is recorded on the first detection of the malfunction.
4.
Sensor 1 indicates the sensor mounted at a position closest to the engine, and sensor 2 indicates
the sensor mounted at the position second closest to the engine.
GDI –
Troubleshooting
13A-14
INSPECTION PROCEDURE CLASSIFIED BY DIAGNOSIS CODE
Code No. P0100 Air flow sensor system
Probable cause
Range of Check
Engine speed: 500 r/min or more
Set Conditions
The sensor output frequency is 3.3 Hz or less for four seconds.
Malfunction of air flow sensor
Open or short circuit in air flow sensor circuit or
loose connector contact
Malfunction of engine-ECU
OK
(3) NG
Check the following connectors:
A-36, C-19
NG
Repair
(2) NG
Check the following connector:
A-36
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU,
and repair if necessary.
MUT-
II
Data list
12 Air flow sensor (Refer to
P.13A-94, DATA LIST REFERENCE
TABLE.)
OK
Transient malfunction
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
NG
Check the following connector:
A-71
NG
Repair
OK
Measure at air flow sensor
connector A-71.
Disconnect the connector and
measure at the harness side.
(1) Voltage between terminal 3 and
earth (Ignition switch: ON)
OK: 4.8 – 5.2 V
(2) Voltage between terminal 4 and
earth (Ignition switch: ON)
OK: System voltage
(3) Resistance between terminal 5
and earth
OK: 2
Ω
or less
(1) NG
Measure at engine-ECU connector
C-18.
Measure the voltage at the
engine-ECU terminal
Ignition switch: ON
Voltage between terminal 61 and
earth
OK: 4.8 – 5.2 V
OK
NG
Repair
NG
Check the following connector:
C-18
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU.
NG
Repair
Check the trouble symptoms.
NG
Replace the engine-ECU.
OK
Check the harness between the air
flow sensor and the engine control
relay, and repair if necessary.
OK
Check the harness between the air
flow sensor and the engine-ECU.
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
OK
To the next page
Check the following connector:
C-18
GDI –
Troubleshooting
13A-15
OK
Check the harness between the air
flow sensor and the engine-ECU.
NG
Repair
Check the harnesses between the
air flow sensor and the engine-ECU
and between the air flow sensor
and the engine control relay, and
repair if necessary.
OK
Measure at air flow sensor
connector A-71.
Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
Selector lever position: P
Voltage between terminal 7 and
earth
OK: Engine: Idling
0 – 1 V
Engine speed: 3,000 r/min
6 – 9 V
NG
Check the following connector:
C-19
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
Check the trouble symptoms.
NG
Check the following connector:
C-18
NG
Repair
OK
Measure the output wave form at
air flow sensor connector A-71 (by
using an analyzer).
Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
Engine: Idling
Voltage between terminal 3 and
earth
OK: Waveforms should be dis-
played on P.13A-84* (In-
spection Procedure Using
an Analyzer) and noise
should not be displayed in
the waveform.
NG
Replace the air flow sensor.
OK
Check the trouble symptoms.
NG
Replace the engine-ECU .
OK
OK
Replace the air flow sensor.
OK
Measure at air flow sensor
connector A-71.
Use test harness (MB991709) to
connect the connector, and
measure at the pick-up harness.
Ignition switch: ON
Voltage between terminal 7 and
earth
OK: 7 – 8 V
NG
Check the following connector:
C-19
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU.
NG
Repair
From the previous page
NOTE
*:
Refer to the ’00 PAJERO PININ Workshop Manual (Pub. No. CKRE00E1).
GDI –
Troubleshooting
13A-16
Code No. P0105 Barometric pressure sensor system
Probable cause
Range of Check
Two seconds have passed since the ignition switch is turned ON or the
engine starting process is completed.
Battery voltage: 8 V or more
Set Conditions
The sensor output voltage is 4.5 V or more for four seconds (equivalent to
114 kPa of barometric pressure)
or
The sensor output voltage is 0.2 V or less (equivalent to 53 kPa of
barometric pressure)
Malfunction of barometric pressure sensor
Open or short circuit in barometric pressure
sensor circuit or loose connector contact
Malfunction of engine-ECU
(2) NG
Check the following connector:
A-36, C-19
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU
,and repair if necessary.
MUT-
II
Data list
25 Barometric pressure sensor
(Refer to P.13A-94, DATA LIST
REFERENCE TABLE.)
OK
Transient malfunction
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
NG
NG
Repair
OK
(1) NG
Measure at engine-ECU connector
C-18.
Measure the voltage at the
engine-ECU terminal.
Ignition switch: ON
Voltage between terminal 41 and
earth
OK: 4.8 – 5.2 V
OK
Check the following connector:
C-18
NG
Repair
NG
Check the following connector:
C-18
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU.
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
OK
To the next page
OK
Check the harness between the air
flow sensor and the engine-ECU.
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
Check the following connector:
A-71
Measure at air flow sensor
connector A-71.
Disconnect the connector and
measure at the harness side.
(1) Voltage between terminal 1 and
earth (Ignition switch: ON)
OK: 4.8 – 5.2 V
(2) Resistance between terminal 5
and earth
OK: 2
Ω
or less
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