Mitsubishi Pajero Pinin. Manual — part 79
GDI –
Troubleshooting
13A-65
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom
Inspection
procedure
No.
Reference page
Communication
with MUT-
II
is
Communication with all systems is not possible.
1
13A-66
with MUT-
II
is
impossible.
Communication with engine-ECU only is not possible.
2
13A-66
Engine warning
lamp and
related parts
The engine warning lamp does not illuminate right after the
ignition switch is turned to the ON position.
3
13A-67
related parts
The engine warning lamp remains illuminating and never goes
out.
4
13A-67
Starting
No initial combustion (starting impossible)
5
13A-78
Initial combustion but no complete combustion
(starting impossible)
6
13A-70
Long time to start (improper starting)
Idling stability
(Improper idling)
Unstable idling (Rough idling, hunting)
7
13A-71
(Improper idling)
Idling speed is high. (Improper idling speed)
8
13A-73
Idling speed is low. (Improper idling speed)
Idling stability
(Engine stalls)
When the engine is cold, it stalls at idling. (Die out)
9
13A-74
(Engine stalls)
When the engine is hot, it stalls at idling. (Die out)
10
13A-75
The engine stalls when starting the car. (Pass out)
11
13A-77
The engine stalls when decelerating.
12
13A-78
Driving
Hesitation, sag or stumble
13
13A-79
Poor acceleration
Surge
The feeling of impact or vibration when accelerating
14
13A-80
The feeling of impact or vibration when decelerating
15
13A-81
Knocking
16
13A-81
Dieseling
17
13A-81
Too high CO and HC concentration when idling
18
13A-82
Low alternator output voltage (approx. 12.3 V)
19
13A-83
Fans (radiator fan, A/C condenser fan) are inoperative
20
13A-84
GDI ECO indi-
cator lamp sys-
GDI ECO indicator lamp does not illuminate.
21
13A-85
cator lamp sys-
tem
GDI ECO indicator lamp remains illuminated and does not go off.
22
13A-85
GDI –
Troubleshooting
GDI –
Troubleshooting
13A-66
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
Communication with MUT-
II
is not possible.
(Communication with all systems is not possible.)
Probable cause
The cause is probably a defect in the power supply system (including earth) for
the diagnosis line.
Malfunction of the connector
Malfunction of the harness wire
Malfunction of MUT-
II
NG
Repair
OK
Measure at the diagnostic connector
(16-pin) B-35.
Voltage between 16 and earth
OK: System voltage
NG
Check the following connectors:
C-76, C-77
NG
Repair
OK
Check trouble symptom.
NG
Check the harness wire between the
power supply and diagnostic connector
(16-pin), and repair if necessary.
OK
Measure at the diagnostic connector
(16-pin) C-35.
Continuity between 4 and earth
Continuity between 5 and earth
OK: Continuity
NG
Check the harness wire between the
diagnostic connector (16-pin) and
earth, and repair if necessary.
OK
Replace the MUT-
II
.
Check the following connector:
C-01
NG
Check trouble symptom.
INSPECTION PROCEDURE 2
MUT-
II
communication with engine-ECU (engine-
A/T-ECU) is impossible.
Probable cause
One of the following causes may be suspected.
No power supply to engine-ECU
Defective earth circuit of engine-ECU
Defective engine-ECU
Improper communication line between engine-ECU and MUT-
II
Malfunction of engine-ECU power supply circuit
Malfunction of engine-ECU
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-19, C-28, C-35, C-53, C-70
NG
Repair
OK
Check the engine-ECU power supply and earth circuit system.
(Refer to P.13A-86, 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.)
GDI –
Troubleshooting
13A-67
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 <M/T> or engine-A/T-ECU <A/T>
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.
Burnt-out bulb
Defective warning lamp circuit
Malfunction of the engine-ECU <M/T>
Malfunction of the engine-A/T-ECU <A/T>
MUT-
II
Data list
16 engine-ECU (engine-A/T-ECU) power supply voltage (Refer
to P.13A-94.)
NG
Check the engine-ECU (engine-A/T-ECU) power supply and earth
circuit system.
(Refer to P.13A-86, INSPECTION PROCEDURE 23.)
OK
Measure at the engine-ECU connector C-17.
Disconnect the connector, and measure at the harness side.
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.
Disconnect the connector, and measure at the harness side.
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-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.
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.
Short-circuit between the engine warning lamp and
engine-ECU
Malfunction of the engine-ECU
MUT-
II
Self-Diag code
Are diagnosis codes displayed?
Yes
Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
CODES.
No
Measure at the combination meter connector C-07.
Disconnect the connector, and measure at the harness side.
Disconnect the engine-ECU connector
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
GDI –
Troubleshooting
13A-68
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.
Malfunction of the fuel supply system
Malfunction of the ignition system
Malfunction of the engine-ECU
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.
OK
Measure at ignition coil connectors A-09, A-10, A-11, A-12.
Connect the connector.
Connect a timing light to the No. 1 terminal of each connector
in turn.
(Engine cranking)
OK: The timing light flashes.
NG
Check the ignition coil (incorporating power transitor) system.
(Refer to P.13A-44, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0300.)
OK
Measure low fuel pressure between the fuel pump (low pressure)
and fuel pump (high pressure). (Refer to P.13A-108.)
NG
Repair
Check fuel leakage. (Refer to P.13A-99*.)
NG
Repair
OK
NG
Measure at injector driver connector A-55.
Disconnect the connector, and measure at the connector side.
Voltage between each of terminals 12, 21 and earth
(Ignition switch: ON)
OK: System voltage
Check the injector driver system.
(Refer to P.13A-88, INSPECTION PROCEDURE 25.)
NG
OK
Inspect engine start ability by cranking the engine while the
accelerator pedal is slightly depressed.
OK
Clean around the throttle valve. (Refer to P.13A-92*.)
OK
MUT-
II
Data list
79 Throttle position sensor (1st channel) (Refer to P.13A-94.)
NG
Check the throttle position sensor (1st channel) system.
(Refer to P.13A-22, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0120.)
OK
MUT-
II
Data list
21 Engine coolant temperature sensor (Refer to P.13A-94.)
NG
Check the engine coolant temperature sensor system.
(Refer to P.13A-19, INSPECTION PROCEDURE FOR DIAGNO-
SIS CODE P0115.)
OK
MUT-
II
Data list
22 Crank angle sensor (Refer to P.13A-94.)
NG
Check the crank angle sensor system. (Refer to P.13A-47, IN-
SPECTION PROCEDURE FOR DIAGNOSIS CODE P0335.)
Yes
MUT-
II
Actuator test
07 Fuel pump (low pressure) (Refer to P.13A-100.)
NG
Check the fuel pump (low pressure) system.
(Refer to P.13A-91, INSPECTION PROCEDURE 29.)
OK
Does the camshaft rotate when the engine is cranking?
No
Check if the timing belt is broken or damaged.
No
MUT-
II
Data list
16 System voltage (Refer to P.13A-94.)
NG
Check the engine control relay and ignition switch-IG system.
(Refer to P.13A-87, INSPECTION PROCEDURE 24.)
OK
MUT-
II
Self-Diag code
Is a diagnosis code displayed?
Yes
Refer to P.13A-12, INSPECTION CHART FOR DIAGNOSIS
CODES.
Check system voltage while the engine is cranking.
OK: 8 V or more
NG
Check the battery. (Refer to GROUP 55 – Battery.)
OK
To the next page
NOTE
*:
Refer to the ’00 PAJERO PININ Workshop Manual (Pub. No. CKRE00E1)
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