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
To the next page
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