Mitsubishi Pajero Pinin. Manual - part 41

GDI – 

Troubleshooting

13A-30

NG

Repair

NG

Repair

OK

Replace the engine-ECU.

NG

Repair

NG

Repair

OK

Replace the fuel pressure sensor.

NG

Replace the engine-ECU.

OK

Check trouble symptom.

OK

Check the following connectors:
A-59, C-19

NG

Repair

OK

Measure at the engine-ECU connector
C-19.

D

Connect the connector.

D

Voltage between 92 and earth
(Engine: idling)
OK: 0.3 – 4.7 V

NG

Check the harness wire between the
engine-ECU and the fuel pressure sen-
sor, and repair if necessary.

NG

Check the harness wire between the
engine-ECU and the fuel pressure sen-
sor.

OK

Check trouble symptom.

NG

Check the harness wire between the
engine-ECU and the fuel pressure sen-
sor.

OK

Check trouble symptom.

OK

Check the following connectors:
A-59, A-82, C-19

Measure at the fuel pressure sensor
connector A-59.

D

Connect the connector. (Use test
harness MB991348)

D

Voltage between 2 and earth
OK: 3 V or less 

(Engine: Cranking)
0.3 – 4.7 V (Engine: Idling)

NG

Measure at the fuel pressure sensor
connector A-59.

D

Disconnect the connector, and
measure at the harness side.

D

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

D

Continuity between 3 and earth
OK: Continuity

NG

Check the following connectors:
A-36, A-82, C-18, C-19

From the previos page

GDI – 

Troubleshooting

GDI – 

Troubleshooting

13A-31

Code No.61 Communication wire with A/T-ECU system

Probable cause

Range of check

D

After 60 seconds have passed since the engine have started

Set conditions

D

Torque reduction request signal from A/T-ECU is input continuously for 1.5
seconds or more.

D

Short circuit in ECU communication circuit

D

Malfunction of the engine-ECU

D

Malfunction of the A/T-ECU

NG

Replace the A/T-ECU.

NG

Repair

Check trouble symptom.

NG

Check the harness wire between the engine-ECU and the
A/T-ECU.

OK

Replace the engine-ECU.

OK

Check trouble symptom.

Check the following connectors: 
C-19, C-25<LHD>, C-26<RHD>, D-04, D-34

NG

Repair

Code No.64 Alternator FR terminal system

Probable cause

Range of check

D

Engine speed is 50 r/min or more.

Set conditions

D

Input voltage from the alternator FR terminal is system voltage for 20
seconds.

D

Open circuit in alternator FR terminal circuit

D

Malfunction of the engine-ECU

NG

Repair

NG

Repair

OK

Replace the engine-ECU.

NG

Repair

NG

Repair

OK

Replace the alternator.

OK

Replace the engine-ECU.

NG

Check the harness wire between the
engine-ECU and the alternator.

OK

Check trouble symptom.

OK

Check the following connector:
A-79

NG

Check the harness wire between the
engine-ECU and the alternator.

OK

Check trouble symptom.

Measure at the alternator connector 
A-79.

D

Connect the connector. (Use test
harness MB991519)

D

Voltage between 4 (blue clip)
and earth
(Engine: Idling)
(Radiator fan: Not operating)
(Headlamp: OFF 

→

 ON)

(Stop lamp: OFF 

→

 ON)

(Rear defogger switch: OFF 

→

ON)
OK: Voltage decreases.

NG

Measure at the alternator connector 
A-79.

D

Disconnect the connector, and
measure at the harness side.

D

Voltage between 4 and earth
(Ignition switch: ON)
OK: System voltage

NG

Check the following connectors:
A-86, C-18

GDI – 

Troubleshooting

13A-32

Code No.66 Brake vacuum sensor system

Probable cause

Range of check

D

Ignition switch: ON

Set conditions

D

Sensor output voltage is 4.8 V or more.

or

D

Sensor output voltage is 0.2 V or less.

D

Malfunction of the brake vacuum sensor

D

Improper connector contact, open circuit or
short-circuited harness wire of the brake vacuum
sensor

D

Malfunction of the engine-ECU

NG

Repair

NG

Repair

OK

Replace the engine-ECU.

NG

Repair

NG

Repair

Replace the brake vacuum sensor.

OK

OK

Check trouble symptom.

Check the following connectors:
A-56, C-19

OK

NG

Replace the engine-ECU.

OK

NG

Check the harness wire between the
engine-ECU and the brake vacuum
sensor.

OK

Check trouble symptom.

NG

Check the harness wire between the
engine-ECU and the brake vacuum
sensor.

OK

Check the following connector:
A-56

OK

Check trouble symptom.

Measure at the brake vacuum sensor
connector A-56.

D

Connect the connector. (Use test
harness MB991348)

D

Voltage between 1 and earth
OK: Voltage increases when

depressing the brake pedal
several times after the
warmed engine is turned
off from idle speed and the
ignition switch is turned on.

NG

Measure at the brake vacuum sensor
connector A-56.

D

Disconnect the connector, and
measure at the harness side.

D

Voltage between 3 and earth
(Ignition switch: ON)
OK: 4.8 – 5.2 V

D

Continuity between 2 and earth
OK: Continuity

NG

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

Measure at the engine-ECU connector
C-19.

D

Connect the connector.

D

Voltage between 74 and earth
OK: Voltage increases when

depressing the brake pedal
several times after the
warmed engine is turned
off from idle speed and the
ignition switch is turned on.

Check the harness wire between the
engine-ECU and the brake vacuum
sensor, and repair if necessary.

Repair

NG

NG

GDI – 

Troubleshooting

13A-33

Code No.77 Accelerator pedal position sensor (2nd
channel) system

Probable cause

Range of check

D

Accelerator pedal position sensor (1st channel) system is normal.

D

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

Set conditions

D

Output voltage of accelerator pedal position sensor (2nd channel) system is
0.2 V or less for one second.

or

D

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

or

D

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

D

Malfunction of the accelerator pedal position sensor
(2nd channel)

D

Open circuit or short-circuited harness wire in the
accelerator pedal position sensor (2nd channel)
system, or poor connector contact

D

Malfunction of the throttle valve controller

D

Malfunction of the engine-ECU

Check the harness wire between the
throttle valve controller and the acceler-
ator pedal position sensor (2nd chan-
nel).

NG

Repair

OK

Replace the throttle valve controller.

NG

Repair

OK

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

Check the accelerator pedal position
sensor (2nd channel). (Refer to P.13A-
104.)

NG

Replace the accelerator pedal position
sensor assembly.

OK

Measure at accelerator pedal position
sensor (2nd channel) connector C-46.

D

Disconnect the connector, and
measure at the harness side.

D

Voltage between terminal 8 and
earth
(Ignition switch: ON)
OK: 4.8 – 5.2 V

D

Continuity between terminal 7 and
earth
OK: Continuity

NG

NG

Repair

OK

Check trouble symptom.

NG

OK

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

D

Connect the connector.

D

Voltage between terminal 20 and
earth (Ignition switch: ON)
OK: 0.7 – 1.4 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 (2nd
channel) and throttle valve controller.

Check trouble symptom.

NG

Replace the throttle valve controller.

OK

MUT-

II

 Data list

78 Accelerator pedal position sensor
(1st channel). (Refer to P.13A-75.)

NG

Check the accelerator pedal position
sensor (1st channel) system. (Refer to
P.13A-34, INSPECTION PROCE-
DURE FOR DIAGNOSIS CODE 78.)

OK

Replace the throttle valve controller.

Check the following connector:
C-48