Mitsubishi Pajero Pinin. Manual - part 44

GDI – 

Troubleshooting

13A-42

INSPECTION PROCEDURE 2

MUT-

II

 communication with engine-ECU is impossible.

Probable cause

This may be caused by malfunction of engine-ECU power supply circuit and earth
circuit.

D

Malfunction of engine-ECU power supply circuit

D

Malfunction of engine-ECU

D

Open circuit between the engine-ECU and diagnosis
connector

NG

Check the harness wire between engine-ECU and diagnosis con-
nector.

NG

Repair

OK

Check trouble symptom.

Check the following connectors:
C-53 <Vehicles with multi center display>, C-19, C-28, C-35,
C-70

NG

Repair

OK

Check the engine-ECU power supply and earth circuit system. (Refer
to P.13A-62, INSPECTION PROCEDURE 23.)

NOTE
On vehicles with multi center display, if a malfunction cannot be resolved after the procedure above, check
the multi center display and replace if necessary. (Refer to GROUP 54 – Multi center display.)

INSPECTION PROCEDURE 3

The engine warning lamp does not illuminate right after
the ignition switch is turned to the ON position.

Probable cause

Because there is a burnt-out bulb, the engine-ECU causes the engine warning lamp
to illuminate for five seconds immediately after the ignition switch is turned to ON.
If the engine warning lamp does not illuminate immediately after the ignition switch
is turned to ON, one of the malfunctions listed at right has probably occurred.

D

Burnt-out bulb

D

Defective warning lamp circuit

D

Malfunction of the engine-ECU

MUT-

II

 Data list

16 Engine-ECU power supply voltage (Refer to P.13A-72.)

NG

Check the engine-ECU power supply and earth circuit system.
(Refer to P.13A-62, INSPECTION PROCEDURE 23.)

OK

Measure at the engine-ECU connector C-17.

D

Disconnect the connector, and measure at the harness side.

D

Earth the terminal No. 31.
OK: The engine warning lamp illuminates.

OK

Check the following
connector: C-17

NG

Repair

OK

Check trouble symptom.

NG

Replace the engine-ECU.

NG

Check a burnt-out bulb.

NG

Replace

OK

Measure at the combination meter connector C-06.

D

Disconnect the connector, and measure at the harness side.

D

Voltage between 1 and earth (Ignition switch: ON)
OK: System voltage

NG

Check the engine warning lamp power supply circuit, and repair
if necessary.

OK

Check the following connectors:
C-06, C-07, C-17, C-28

NG

Repair

OK

Check trouble symptom.

NG

Check the harness wire between combination meter and engine-
ECU, and repair if necessary.

GDI – 

Troubleshooting

13A-43

INSPECTION PROCEDURE 4

The engine warning lamp remains illuminating and never
goes out.

Probable cause

In cases such as the above, the cause is probably that the engine-ECU is detecting
a problem in a sensor or actuator, or that one of the malfunctions listed at right
has occurred.

D

Short-circuit between the engine warning lamp and
engine-ECU

D

Malfunction of the engine-ECU

MUT-

II

 Self-Diag code

Are diagnosis codes displayed?

Yes

Refer to P.13A-14, INSPECTION CHART FOR DIAGNOSIS
CODES

No

Measure at the combination meter connector C-07.

D

Disconnect the connector, and measure at the harness side.

D

Disconnect the engine-ECU connector

D

Continuity between 46 and earth
OK: No continuity

NG

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

OK

Replace the engine-ECU.

INSPECTION PROCEDURE 5

No initial combustion (starting impossible)

Probable cause

This is caused by incorrect fuel supply into the combustion chamber, and improper
ignition circuit. Besides that, foreign material may be contaminated in fuel.

D

Malfunction of the fuel supply system

D

Malfunction of the ignition system

D

Malfunction of the engine-ECU

Check system voltage while the engine is cranking.
OK: 8 V or more

NG

Check the battery. (Refer to GROUP 55 – Battery.)

OK

MUT-

II

 Self-Diag code

Is a diagnosis code displayed?

Yes

Refer to P.13A-14, INSPECTION CHART FOR DIAGNOSIS
CODES.

No

MUT-

II

 Data list

16 System voltage (Refer to P.13A-72.)

NG

Check the engine control relay and ignition switch-IG system.
(Refer to P.13A-62, INSPECTION PROCEDURE 24.)

OK

Does the camshaft rotate when the engine is cranking?

No

Check if the timing belt is broken or damaged.

Yes

MUT-

II

 Actuator test

07 Fuel pump (low pressure) (Refer to P.13A-76.)

NG

Check the fuel pump (low pressure) system. (Refer to P.13A-66,
INSPECTION PROCEDURE 28.)

OK

MUT-

II

 Data list

22 Crank angle sensor (Refer to P.13A-72.)

NG

Check the crank angle sensor system. (Refer to P.13A-20, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE 22.)

OK

MUT-

II

 Data list

21 Engine coolant temperature sensor (Refer to P.13A-72.)

NG

Check the engine coolant temperature sensor system. (Refer to
P.13A-19, INSPECTION PROCEDURE FOR DIAGNOSIS CODE
21.)

OK

To the next page

GDI – 

Troubleshooting

13A-44

NG

OK

MUT-

II

 Data list

14 Throttle position sensor (2nd channel) (Refer to P.13A-72.)

NG

Check the throttle position sensor (2nd channel) system. (Refer
to P.13A-18, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 14.)

OK

Inspect engine start ability by cranking the engine while the acceler-
ator pedal is slightly depressed.

OK

Clean around the throttle valve. (Refer to P.13A-92.)

Check fuel leakage. (Refer to P.13A-99.)

NG

Repair

OK

Measure low fuel pressure between the fuel pump (low pressure)
and fuel pump (high pressure). (Refer to P.13A-95.)

NG

Repair

OK

Measure at ignition coil connectors A-09, A-10, A-11, A-12.

D

Connect the connector.

D

Connect a timing light to the No.1 terminal of each connector
in turn.
(Engine cranking)
OK: The timing light flashes.

NG

Check abnormal fuel combustion system. (Refer to P.13A-27, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE 44.)

OK

Check ignition timing while the engine is cranking.

OK: Approx. 5

_

 BTDC

NG

Check that the crank angle sensor and timing belt cover are proper-
ly installed.

From the previous page

OK

Check ignition coil spark for each cylinder.
(1) Remove the ignition coil.
(2) Install a new spark plug to the removed ignition coil.
(3) Disconnect the injector intermediate connector.

Caution
Never touch the connector terminal as approx. 100 V is
applied to the injector, or you are seriously injured.

(4) Earth the spark plug electrode securely.
(5) Check that the spark plug ignites when the engine is cranked.

NG

OK

Check all the following items:

D

Spark plug

D

Compression pressure

D

Foreign material (such as water or kerosine) entered the fuel
lines

Check trouble symptom.

OK

NG

Replace the ignition coil.

Replace the injector.

GDI – 

Troubleshooting

13A-45

INSPECTION PROCEDURE 6

Initial combustion takes place, but does not complete
(start impossible), too long time to start (poor start)

Probable cause

This may be caused by improper spark plug ignition (poor spark), improper mixture
during engine cranking, improper fuel pressure.

D

Malfunction of the fuel supply system

D

Malfunction of the fuel pressure sensor

D

Malfunction of the ignition system

D

Malfunction of the electronic-controlled throttle vale
system

D

Malfunction of the engine-ECU

NG

Check system voltage while the engine is cranking.
OK: 8 V or more

NG

Check the battery. (Refer to GROUP 55 – Battery.)

OK

MUT-

II

 Self-Diag code

Is a diagnosis code displayed?

Yes

Refer to P.13A-14, INSPECTION CHART FOR DIAGNOSIS
CODES.

No

MUT-

II

 Actuator test

07 Fuel pump (low pressure) (Refer to P.13A-76.)

NG

Check the fuel pump (low pressure) system. (Refer to P.13A-66,
INSPECTION PROCEDURE 28.)

OK

MUT-

II

 Data list

21 Engine coolant temperature sensor (Refer to P.13A-72.)

NG

Check the engine coolant temperature system. (Refer to P.13A-
19, INSPECTION PROCEDURE FOR DIAGNOSIS CODE 21.)

OK

MUT-

II

 Data list

18 Cranking signal (Refer to P.13A-72.)

NG

Check the ignition switch-ST system <M/T>. (Refer to P.13A-63,
INSPECTION PROCEDURE 25.)
Check the ignition switch-ST system and inhibitor switch<A/T>.
(Refer to P.13A-64, INSPECTION PROCEDURE 26.)

OK

MUT-

II

 Data list

74 Fuel pressure sensor (Refer to P.13A-75.)

NG

Check an abnormal fuel pressure system. (Refer to P.13A-29,
INSPECTION PROCEDURE FOR DIAGNOSIS CODE 56.)

Check fuel leakage. (Refer to P.13A-99.)

NG

Repair

OK

Is the engine started normally when it is cranked with the accelera-
tor pedal depressed slightly?

Yes

Clean around the throttle valve. (Refer to P.13A-92.)

No

MUT-

II

 Data list

14 Throttle position sensor (2nd channel) (Refer to P.13A-72.)

NG

Check the throttle position sensor (2nd channel) system. (Refer
to P.13A-18, INSPECTION PROCEDURE FOR DIAGNOSIS
CODE 14.)

OK

Check ignition timing when the engine is cranked.
OK: approx. 5

_

 BTDC

NG

Check that the crank angle sensor and timing belt cover are proper-
ly installed.

OK

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