Mitsubishi Pajero Pinin. Manual — part 68
GDI –
Troubleshooting
13A-21
OK
Check the trouble symptoms.
NG
Replace the engine-ECU.
OK
Measure at engine coolant
temperature sensor connector A-69.
Use test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.
Ignition switch: ON
Voltage between terminal 1 and
earth
OK: At 0
C of engine coolant
temperature: 3.2 – 3.8 V
At 20
C of engine coolant
temperature: 2.3 – 2.9 V
At 40
C of engine coolant
temperature: 1.3 – 1.9 V
At 80
C of engine coolant
temperature: 0.3 – 0.9 V
NG
Check the engine coolant
temperature sensor.
(Refer to P.13A-102*.)
NG
Repair
OK
Check the harness wire between
the engine coolant temperature
sensor and the engine-ECU, and
repair if necessary.
OK
Check the following connectors:
A-36, C-18, C-19
NG
Repair
From the previous page
NOTE
*:
Refer to the ’00 PAJERO PININ Workshop Manual (Pub. No. CKRE00E1).
GDI –
Troubleshooting
13A-22
Code No. P0120 Throttle position sensor (1st channel)
system
Probable cause
The throttle valve controller judges a malfunction, and then transmit the result
to the engine-ECU.
Range of Check
Ignition switch: ON
Set Conditions
The sensor output voltage is 0.2 V or less.
or
The sensor output voltage is 4.9 V or more.
or
The throttle position sensor (1st channel) and throttle position sensor (2nd
channel) combination output voltage is outside 4 – 6 V.
or
The output voltage of the throttle position sensor (1st channel) is
significantly different (approx. 1V) from the throttle valve opening angle
(voltage), which the engine-ECU request the throttle valve controller.
Malfunction of throttle position sensor
Open or short circuit in the throttle position
sensor (1st channel) circuit or loose connector
contact
Malfunction of throttle valve controller
Malfunction of engine-ECU
OK
Check the harness wire between
the throttle position sensor and the
throttle valve controller, and repair if
necessary.
MUT-
II
Data list
79 Throttle position sensor (1st
channel) (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 throttle position sensor.
(Refer to P.13A-103*.)
NG
Replace
OK
Measure at throttle position sensor
connector A-06.
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 3
and earth
OK: 2
Ω
or less
(1) NG
Measure at throttle valve controller
connector C-48.
Measure voltage at the throttle
valve controller connector
terminals.
Ignition switch: ON
Voltage between terminal 6 and
earth
OK: 4.8 – 5.2 V
OK
Check the following connector:
C-48
NG
Repair
NG
Check the following connector:
C-48
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the throttle valve controller.
OK
Check the following connector:
A-06
NG
Repair
(2) NG
Check the following connector:
C-48
NG
Repair
OK
Check the harness wire between
the throttle position sensor and the
throttle valve controller.
NG
Repair
OK
Check the harness wire between
the throttle position sensor and the
throttle valve controller.
NG
Repair
OK
Check the trouble symptoms.
NG
Replace the throttle valve controller.
OK
To the next page
NOTE
*:
Refer to the ’00 PAJERO PININ Workshop Manual (Pub. No. CKPE00E1)
GDI –
Troubleshooting
13A-23
OK
Measure at throttle valve controller
connector C-48.
Measure voltage at the throttle
valve controller connector
terminals.
Ignition switch: ON
Voltage between terminal 7 and
earth
OK: Accelerator pedal fully re-
leased: 0.45 – 0.8 V
Accelerator pedal fully de-
pressed: 3.9 – 4.9 V
NG
Check the following connector:
C-48
NG
Repair
OK
Check the harness wire between
the throttle position sensor and the
throttle valve controller, and repair if
necessary.
OK
Check the following connector:
C-48
OK
Check the trouble symptoms.
NG
Replace the throttle valve controller.
From the previous page
NG
Repair
OK
Measure at throttle position sensor
connector A-66.
Use test harness (MB991536) to
connect the connector, and
measure at the pick-up harness.
Ignition switch: ON
(1) Voltage between terminal 1 and
earth
OK: 4.8 – 5.2 V
(2) Voltage between terminal 2 and
earth
OK: Accelerator pedal fully re-
leased: 0.45 – 0.8 V
Accelerator pedal fully de-
pressed: 3.9 – 4.9 V
(3) Voltage between terminal 3 and
earth
OK: 0.5 V or less
(1) NG
Check the following connector:
C-48
NG
Repair
(3) NG
OK
Check the harness wire between
the throttle position sensor and the
throttle valve controller, and repair if
necessary.
(2) NG
Adjust the throttle position sensor.
(Refer to P.13A-92*.)
Check the following connector:
C-48
NG
Repair
OK
Check the harness wire between
the throttle position sensor and the
throttle valve controller, and repair if
necessary.
NOTE
*:
Refer to the ’00 PAJERO PININ Workshop Manual (Pub. No. CKRE00E1)
GDI –
Troubleshooting
GDI –
Troubleshooting
13A-24
Code No. P0125 Feedback system
Probable cause
Range of Check
The engine coolant temperature is approx. 80
C or more.
During stoichiometric feedback control
The vehicle is not being decelerated.
Set Conditions
Oxygen sensor (front) output voltage has been higher or lower than 0.5 V
for at least thirty seconds.
Malfunction of oxygen sensor (front)
Open or short circuit in the oxygen sensor (front)
circuit or loose connector contact
Malfunction of engine-ECU
Repair
OK
Measure at oxygen sensor (front)
connector A-67.
Disconnect the connector and
measure at the harness side.
Resistance between terminal 2
and earth
OK: 2
Ω
or less
NG
Check the following connectors:
A-36, C-19
NG
OK
Check the trouble symptoms.
Check the following connector:
A-67
NG
Repair
(2) NG
Check the oxygen sensor (front).
(Refer to P.13A-112.)
NG
Replace
OK
Check the harness wire between
the oxygen sensor (front) and the
engine-ECU
NG
Repair
NG
Replace the engine-ECU.
Repair
OK
Measure at oxygen sensor (front)
connector A-67.
Use the test harness
(MD998464) to connect the
connector, and measure at the
pick-up harness side.
Engine: 2,500 r/min (after
warming up)
(1) Voltage between terminal 2 and
earth
OK: 0.5 V or less
(2) Voltage between terminal 4 and
earth
OK: 0 V and 0.8 V alternate.
(1) NG
Check the following connectors:
A-36, C-19
NG
OK
Check the harness wire between
the oxygen sensor (front) and the
engine-ECU, and repair if necessary.
OK
NG
Repair
OK
Check the harness wire between
the oxygen sensor (front) and the
engine-ECU, and repair if necessary.
OK
NG
Check the following connector:
C-19
NG
OK
Check the harness wire between
the oxygen sensor (front) and the
engine-ECU, and repair if necessary.
OK
Check the following connector:
C-19
OK
Repair
NG
Check the trouble symptoms.
OK
Transient malfunction
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)
NG
Replace the engine-ECU.
Repair
Check the following connector:
C-19
Measure at engine-ECU connector
C-19.
Measure the voltage at the
engine-ECU terminal.
Engine: 2,500 r/min (after
warming up)
Voltage between terminal 71 and
earth
OK: 0 V and 0.8 V alternate.
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