Mitsubishi Pajero Pinin. Manual - part 78

GDI  – 

Troubleshooting

13A-61

Code No. P1500 Alternator FR terminal system

Probable cause

Range of Check



Engine speed: 50 r/min or more

Set Conditions



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



Open circuit in alternator FR terminal circuit



Malfunction of engine-ECU

OK

OK

Intermittent malfunction 
(Refer to GROUP 00 – Points to
Note for Intermittent Malfunctions.)

NG

Replace the alternator.

OK

Check the trouble symptoms.

OK

Check the harness wire between
the intermediate connector and the
engine-ECU.

NG

Repair

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

OK

Check the harness wire between
the intermediate connector and the
engine-ECU.

NG

Repair

OK

Check the harness wire between
the intermediate connector and the
engine-ECU, and repair if necessary.

NG

Repair

NG

Check the following connector:
C-18

NG

Repair

Check the following connector:
A-86

NG

Repair

OK

Measure at intermediate connector
A-86.



Use test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.



Engine: Idling (After warming up)



Radiator fan: Not operating



The voltage between terminal 2
and earth
OK: The voltage drops when

the headlamps are turned
on. 

NG

Check the following connector:
A-79

NG

Repair

Replace the engine-ECU.

OK

Measure at intermediate connector
A-86.



Use test harness (MB991658) to
connect the connector, and
measure at the pick-up harness.



Ignition switch: ON



The voltage between terminal 6
and earth
OK: 9  – 10 V

NG

Measure at engine-ECU connector
C-18.



Measure the voltage at the
engine-ECU terminal.



Ignition switch: ON



The voltage between terminal 52
and earth
OK: 9  – 10 V

NG

Check the following connector:
C-18

OK

NG

Repair

OK

Check the following connector:
C-18

NG

Replace

Check the harness wire between
the alternator and the intermediate
connector.

NG

Check the trouble symptoms.

GDI  – 

Troubleshooting

13A-62

Code No. P1515 Brake vacuum sensor system

Probable cause

Range of Check



Ignition switch: ON

Set Conditions



Sensor output voltage is 4.8 V or more.

or



Sensor output voltage is 0.2 V or less.



Malfunction of the brake vacuum sensor



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



Malfunction of the engine-ECU

To the next page.

OK

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

OK

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

NG

Repair

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

NG

Repair

(2) NG

OK

Check the trouble symptoms.

NG

Replace the engine-ECU.

OK

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

NG

Repair

OK

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

NG

Repair

OK

Check the following connector:
C-18

NG

Repair

Check the following connector:
A-70

NG

Repair

OK

Measure at brake vacuum sensor
connector A-56



Disconnect the connector and
measure at the harness side.

(1) The voltage between terminal 3

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

(2) Continuity between terminal 2

and earth
OK: 2

Ω 

or less

(1) NG

Measure at engine-ECU connector
C-18.



Measure the voltage at the
engine-ECU terminals.



Ignition switch: ON



The voltage between terminal 41
and earth
OK: 4.8  – 5.2 V

NG

Check the following connector:
C-18

MUT-

II

 Data list

66 Brake vacuum sensor

OK: (Refer to P.13A-94, DATA

LIST REFERENCE TABLE.)

OK

Intermittent malfunction (Refer to
GROUP 00 – Points to Note for
intermittent Malfunctions.)

NG

GDI  – 

Troubleshooting

13A-63

NG

Replace the engine-ECU.

OK

Check the trouble symptom.

OK

NG

Repair

NG

NG

Repair

OK

Check the trouble symptoms.

(2) NG

Replace the brake vacuum sensor.

OK

Measure at engine-ECU connector
C-19.



Measure the voltage at the
engine-ECU terminal.



Engine: Idling



The voltage between 74 and
earth
OK: 0.9  – 1.5 V

NG

Check the following connector:
C-19

OK

(1) NG

Check the following connector:
C-18

NG

Repair

OK

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

OK

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

From the previous page

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

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

(3) NG

OK

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

Repair

NG

Measure at brake vacuum sensor
connector A

-

56.



Use test harness (MB991348) to
connect terminals, and measure at
the pick-up harness side.



Engine: Idling

(1) The voltage between 3 and earth

OK: 4.8  – 5.2 V

(2) The voltage between 1 and earth

OK: 0.9  – 1.5 V

(3) The continuity between 2 and

earth
OK: 2 

Ω

 or less

Check the following connector:
C-19

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

GDI  – 

Troubleshooting

GDI  – 

Troubleshooting

13A-64

Cord No. P1600 Communication wire with A/T-ECU
system

Probable cause

Range of Check



After 60 seconds have passed since the engine have started

Set Conditions



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



Short circuit in ECU communication circuit



Malfunction of the engine-ECU



Malfunction of the A/T-ECU

Replace

NG

Repair

Check the following connectors: 
C-19, C-25<LHD>, C-26<RHD>, D-34, D-45

OK

Check trouble symptom.

NG

OK

Replace the engine-ECU.

Check trouble symptom.

NG

Replace the A/T-ECU.

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

NG

Cord No. P1610 Immobilizer system

Probable cause

Range of Check



Ignition switch: ON

Set Conditions



Improper communication between the engine-ECU and the immobilizer-ECU



Open or short circuit, or loose connector contact



Malfunction of the immobilizer-ECU



Malfunction of the engine-ECU

NOTE
(1) If the registered ignition keys are close each other when starting the engine, radio interference may

cause this code to be displayed.

(2) This code may be displayed when registering the key ID code.

NG

Replace the engine-ECU.

Check the trouble symptoms.

NG

Replace the immobilizer-ECU.

OK

Check the trouble symptoms.

OK

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

NG

Replace

Check the following connectors: 
1, C-19, C-29, C-62

NG

Repair