Mitsubishi Pajero Pinin. Manual - part 42

GDI – 

Troubleshooting

13A-34

Code No.78 Accelerator pedal position sensor (1st
channel) system

Probable cause

Range of check

D

Accelerator pedal position sensor (2nd channel) system is normal.

D

Communication between the engine-ECU and throttle valve controller is normal.

Set conditions

D

Output voltage of accelerator position sensor (1st channel) system is 0.2 V or
less for one second.

or

D

Output voltage of the accelerator pedal position sensor (2nd channel) is 2.5
V or less, and (1st channel) output voltage of the accelerator pedal position
sensor is 4.5 V or more for one second.

or

D

Difference between the accelerator pedal position sensor (1st and 2nd channels)
output voltages exceeds 1.0 V (i.e. when the throttle valve opening angle changes
slightly).

or

D

Although the accelerator pedal position switch is on, 1st-channel output voltage
of the accelerator pedal position sensor exceeds 1.1 V for one second.

D

Malfunction of the accelerator pedal position sensor
(1st channel)

D

Open circuit or short-circuited harness wire in the
accelerator pedal position sensor (1st channel)
system, or poor connector contact

D

ON-seizure of the accelerator pedal position switch

D

Malfunction of the throttle valve controller

D

Malfunction of the engine-ECU

NG

Repair

OK

Adjust the accelerator pedal position
sensor. (Refer to P.13A-94.)

NG

Repair

OK

Replace the engine-ECU.

MUT-

II

 Data list

26 Accelerator pedal position switch
(P.13A-73.)

NG

Check the accelerator pedal position
switch system. (Refer to P.13A-65.),
INSPECTION PROCEDURE 27.)

OK

Check the accelerator pedal position
sensor (1st channel). (Refer to P.13A-
104.)

NG

Replace the accelerator pedal position
sensor assembly.

OK

Measure at the accelerator pedal posi-
tion sensor (1st channel) connector
C-46.

D

Disconnect the connector, and
measure at the harness side.

D

Voltage between terminal 2 and
earth (Ignition switch: ON)
OK: 4.8 – 5.2 V

D

Continuity between terminal 5 and
earth
OK: Continuity

NG

Check the following connectors:
A-36, C-18, C-19

NG

Repair

OK

Check trouble symptom.

NG

Check the harness wire between the
accelerator pedal position sensor (1st
channel) and engine-ECU.

OK

Measure at the engine-ECU C-19.

D

Connect the connector.

D

Voltage between terminal 94 and
earth
(Ignition switch: ON)
OK: 0.935 – 1.135 V

(Accelerator pedal: fully re-
leased)
4.1 V or more
(Accelerator pedal: fully de-
pressed)

NG

Check the following connector:
C-46

NG

Repair

OK

Check trouble symptom.

NG

Check the harness wire between the
accelerator pedal position sensor (1st
channel) and engine-ECU.

Check trouble symptom.

NG

Replace the engine-ECU.

OK

MUT-

II

 Data list

77 Accelerator pedal position sensor
(2nd channel). (Refer to P.13A-75.)

NG

Check the accelerator pedal position
sensor (2nd channel) system. (Refer
to P.13A-33, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE 77.)

OK

Replace the engine-ECU.

GDI – 

Troubleshooting

13A-35

Code No.79 Throttle position sensor (1st channel) system

Probable cause

The throttle valve controller determines a failure, and sends it result to the engine-ECU.
Range of check

D

Ignition switch: ON

D

System voltage: 8 V or more

Set conditions

D

Output voltage of the sensor remains 0.2 V for one second.

or

D

Output voltage of the sensor remains 4.9 V for one second.

or

D

Output voltage of the throttle position sensor (1st and 2nd channels) remains
outside 4 – 6 V for four seconds.

D

Malfunction of the throttle position sensor (1st channel)

D

Open circuit or short-circuited harness wire in the
throttle position sensor (1st channel), or poor
connector contact

D

Malfunction of the throttle valve controller

D

Malfunction of the engine-ECU

NG

Repair

OK

Replace the throttle valve controller.

MUT-

II

 Data list

Is code No. 14, 91 or 92 output?

Yes

Follow INSPECTION PROCEDURE
FOR DIAGNOSIS CODE.

No

Check the throttle position sensor. (Re-
fer to P.13A-103.)

NG

Replace

OK

Measure at throttle position sensor con-
nector A-03.

D

Disconnect the connector, and
measure at the harness side.

D

Voltage between terminal 1 and
earth
(Ignition switch: ON)
OK: 4.8 – 5.2 V

D

Continuity between terminal 3 and
earth
OK: Continuity

NG

Check the following connector:
C-48

NG

Repair

OK

Check trouble symptom.

NG

Check the harness wire between the
throttle valve controller and throttle
position sensor.

OK

Measure at throttle valve controller con-
nector C-48.

D

Connect the connector.

D

Disconnect the throttle control servo
connector (Close the throttle valve
fully by finger).

D

Voltage between terminal 7 and
earth
(Ignition switch: ON)
OK: 0.4 – 0.6 V

NG

Check the following connector:
A-03

NG

Repair

OK

Check trouble symptom.

NG

Check the harness between the throttle
position sensor and throttle valve con-
troller.

OK

Adjust the throttle position sensor. (Re-
fer to P.13A-92.)

Check trouble symptom.

NG

Replace the throttle valve controller.

NG

Repair

OK

Measure at engine-ECU connector
C-19.

D

Connect the connector.

D

Disconnect the throttle control servo
connector (Close the throttle valve
fully by finger).

D

Voltage between terminal 78 and
earth (Ignition switch: ON)
OK: 3.9 – 4.9 V

NG

Check the following connector:
A-03

NG

Repair

OK

Check trouble symptom.

NG

Check the harness wire between the
throttle position sensor and engine-
ECU, and repair if necessary.

OK

Replace the engine-ECU.

GDI – 

Troubleshooting

13A-36

Code No.89 Abnormal fuel pressure system

Probable cause

Range of check

D

Engine: Idling (during stoichio-feedback operation)

Set conditions

D

Fuel injection correction value remains excessively low for ten seconds or more.

or

D

Fuel injection correction value remains excessively high for ten seconds or more.

D

Malfunction of the fuel pump (high pressure)

D

Malfunction of the intake air temperature sensor

D

Malfunction of the barometric pressure sensor

D

Malfunction of the air flow sensor

D

Malfunction of the engine-ECU

MUT-

II

 Data list

13 Intake air temperature sensor. (Refer to P.13A-71.)

NG

Check the intake air temperature sensor system. (Refer to P.13A-
17, INSPECTION PROCEDURE FOR DIAGNOSIS CODE No.13.)

OK

MUT-

II

 Data list

25 Barometric air temperature sensor. (Refer to P.13A-73.)

NG

Check the barometric pressure sensor system. (Refer to P.13A-23,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE No.25.)

OK

MUT-

II

 Data list

12 Air flow sensor. (Refer to P.13A-71.)

NG

Check the air flow sensor system. (Refer to P.13A-16, INSPEC-
TION PROCEDURE FOR DIAGNOSIS CODE No.12.)

OK

Replace the fuel pump (high pressure).

Code No.91 Electronic-controlled throttle valve system

Probable cause

Range of check

D

Ignition switch: ON

D

Error in communication from the engine-ECU to throttle valve controller

Set conditions

D

Output voltage of the throttle position sensor (2nd channel) fluctuates significantly
(approx. 1 V or more) from an expected value.

Range of check

D

Ignition switch: ON

D

Error in communication from the throttle valve controller to engine-ECU

Set conditions

D

The throttle valve opening angle (voltage) which the engine-ECU requested of
the throttle valve controller is significantly different from output voltage of the
(2nd channel) throttle position sensor (approx. one volt).

D

Short in communication line

D

Malfunction of the engine-ECU

D

Malfunction of the throttle valve controller

MUT-

II

 Self-Diag code

Is any other diagnosis code than No.94 output?

Yes

Follow INSPECTION PROCEDURE FOR DIAGNOSIS CODE.

No

Check the harness wire between the throttle valve controller and
engine-ECU.

NG

Repair

OK

Replace the throttle valve controller.

GDI – 

Troubleshooting

13A-37

Code No.92 Throttle valve position feedback system

Probable cause

The throttle valve controller determines if a failure is present, and sends its result
to the engine-ECU.
Range of check

D

Ignition switch: ON

D

System voltage: 8 V or more

Set condition

D

Motor position feedback system is defective (System detects a motor overcurrent,
or that actual and projected opening angles of the throttle position sensor (1st
channel) are different by 1.0 V or more.

D

Malfunction of the throttle position sensor (1st channel)

D

Open circuit or short-circuited harness wire in the
throttle position sensor system (1st channel), or poor
connector contact

D

Malfunction of the throttle valve controller

Check the throttle valve control servo. (Refer to P.13A-107.)

NG

Replace

OK

Check the following connectors:A-05, C-48

NG

Repair

OK

Check trouble symptom.

NG

Check the harness wire between the throttle control servo and
throttle valve controller.

NG

Repair

OK

Replace the throttle body.

Check trouble symptom.

NG

Replace the throttle valve controller.

Code No.94 Communication line system with throttle valve
controller

Probable cause

Range of check

D

Ignition switch: ON

D

System voltage: 8 V or more

D

Engine: not cranking

Set condition

D

System detects an error in communication line between the engine-ECU and
throttle valve controller.

D

Short circuit in communication line

D

Malfunction of the engine-ECU

D

Malfunction of the throttle valve controller

Check the following connectors: C-19, C-48

NG

Repair

OK

Check trouble symptom.

NG

Check the harness wire between the engine-ECU and throttle
valve controller.

OK

Replace the throttle valve controller.

Check trouble symptom.

NG

Replace the engine-ECU.

NG

Repair