Mitsubishi Pajero Pinin. Manual - part 65

GDI  – 

Troubleshooting

13A-9

FREEZE FRAME DATA

When the engine-ECU detects a malfunction and stores a
diagnosis code, it also stores a current status of the engine.
This function is called  “Freeze frame data.” By analyzing
this  “freeze frame” data with the MUT-

II

, an effective

troubleshooting can be performed.
The display items of freeze frame data are shown below.
Display item list

Data item

Unit

Engine coolant temperature sensor



C

Engine speed

r/min

Vehicle speed

km/h

Long-term fuel compensation (long-term
fuel trim)

%

Short-term fuel compensation (short-term
fuel trim)

%

Fuel control condi-
tion

Open loop

OL

tion

Closed loop

CL

Open loop owing to
drive condition

OL-DRV.

Open loop owing to
system malfunction

OL-SYS.

Closed loop based
on one oxygen sen-
sor

CL-H02S

Calculation load value

%

Diagnosis code during data recording

–

NOTE
If malfunctions have been detected in multiple systems, store
one malfunction only, which has been detected first.

READINESS TEST STATUS

The engine-ECU  monitors the following main diagnosis items,
judges if these items are in good condition or not, and the
stores its history.  This history can be read out by using MUT-

II

.

(If the ECU has judged a item before, the MUT-

II

 displays

“Complete.”)
In addition, if diagnosis codes are erased or the battery  cable
is disconnected, this history will also be erased (the memory
will be reset).



Catalyst: P0420



Oxygen sensor: P0130



Oxygen sensor heater: P0135, P0141

GDI  – 

Troubleshooting

13A-10

FAIL-SAFE FUNCTION REFERENCE TABLE

When the main sensor malfunctions are detected by the diagnosis function, the vehicle is controlled by
means of the pre-set control logic to maintain safe conditions for driving.

Malfunctioning item

Control contents during malfunction

Air flow sensor

1.

Suspends lean burn operation.

2.

Uses the throttle position sensor signal and engine speed signal (crank angle
sensor signal) to take reading of the basic injector drive time and basic ignition
timing from the pre-set mapping.

Intake air temperature sensor

Controls as if the intake air temperature is 25



C.

Throttle position sensor (2nd
channel)

1.

Suspends lean burn operation.

2.

Controls the throttle opening angle feedback (half as much as the opening
rate in the normal condition) by using signals from the throttle position sensor
(1st channel). However,  this controlling system is not applied if the throttle
position sensor (1st channel) and throttle position sensor (2nd channel)
combination output voltage is outside 4 – 6 V.

3.

Refrains from controlling the throttle opening angle feedback if the throttle
position sensor (1st channel) is also defective.

Engine coolant temperature
sensor

Controls as if the engine coolant temperature is 80



C.

 

(Moreover, the control system

is working until the ignition switch is turned OFF if the sensor signal returns to normal.)

Camshaft position sensor

Controls maintaining the condition before determined as failure.
Fuel will be cut-off 4 seconds after a malfunction is detected. (However, only if
No. 1 cylinder TDC has never been detected after the ignition switch is turned
to the ON position)

Vehicle speed sensor

1.

Suspends lean burn operation. However, the control is cancelled as a certain
time passes by with the engine speed of 1,500 r/min or more.

2.

Suspends lean burn operation during the engine idling.

Barometric pressure sensor

Controls as if the barometric pressure is 101 kPa.

Detonation sensor

Fixes the ignition timing as that for standard petrol.

Injector

1.

Suspends lean burn operation.

2.

Suspends the exhaust gas recirculation.

Communication line with
A/T-ECU

Disable ignition timing retard control (engine and transmission total control) during
shift change.

Ignition coil (incorporating pow-
er transistor)

1.

Suspends lean burn operation.

2.

Cuts off the fuel supply to cylinders with an abnormal ignition signal.

Fuel pressure sensor

1.

Controls as if the fuel pressure is 5 MPa. (In case of open/short circuit)

2.

Turns the fuel pump relay off. (In case of abnomality in high pressure)

3.

Suspends fuel injection. (when the low pressure is detected and the engine
speed is more than 3,000 r/min)

Alternator FR terminal

Refrains from controlling to suppress the alternator output to electrical load.
(Operated as a normal alternator)

Accelerator pedal position sen-
sor (2nd channel)

1.

Suspends lean burn operation.

2.

Controls the throttle valve position by using signals from the accelerator pedal
position sensor (1st channel). (However, the control system is not applicable
if the difference from the accelerator pedal position sensor (1st channel) output
voltage is 1.0 V or higher.)

3.

Suspends the electronic controlled throttle valve system if accelerator pedal
position sensor (1st channel) is also defective.

GDI  – 

Troubleshooting

13A-11

Malfunctioning item

Control contents during malfunction

Accelerator pedal position sen-
sor (1st channel)

1.

Suspends lean burn operation.

2.

Controls the throttle valve position by using signals from the accelerator pedal
position sensor (2nd channel). (However, this control is not applicable if the
voltage difference between the accelerator pedal position sensor (1st channel)
and accelerator pedal position sensor (2nd channel) is 1.0 V or higher.)

3.

Also suspends the electronic-controlled throttle valve system when the
accelerator pedal position sensor (2nd channel) is defective.

Throttle position sensor (1st
channel)

1.

Suspends lean burn operation.

2.

Controls throttle opening angle feedback by using signals from throttle position
sensor (2nd channel). (However, the controlling system is not applied when
the throttle position sensor (1st channel) and throttle position sensor (2nd
channel) combination output voltage is outside 4 – 6 V.)

3.

Refrains from controlling the throttle opening angle feedback when throttle
position sensor (2nd channel) is also defective.

Electronic-controlled throttle
valve system

1.

Suspends the electronic controlled throttle valve system.

2.

Suspends lean burn operation.

3.

Suspends the idle speed feedback control.

Throttle valve position feed-
back

1.

Suspends the electronic controlled throttle valve system.

2.

Suspends lean burn operation.

3.

Suspends the engine speed feedback control.

Communication line between
the throttle valve controller and
the engine-ECU

1.

Communication error between the throttle valve controller and the engine-ECU



Suspends lean burn operation.



Cuts the fuel supply when the engine speed reaches 3,000 r/min or more.



Suspends the cruise-control.

2.

Communication error between the throttle valve controller and the engine-ECU



Suspends lean burn operation.



Cuts the fuel supply when the engine speed reaches 3,000 r/min or more.



Suspends the cruise-control.



The throttle valve controller controls the throttle valve opening angle by
using signals from accelerator pedal position sensor (2nd channel).

Throttle control servo motor 1st
phase malfunction

Bans lean burn operation.

Throttle control servo motor
2nd phase malfunction

1.

Suspends electronic control throttle valve system.

2.

Bans lean burn operation.

3.

Bans engine speed feed back control.

Misfiring

If the detected misfiring causes damage to the catalyst, the misfiring cylinder will be
shut down.

NOTE
If the electronic-controlled throttle valve system is suspended, the engine warning lamp will illuminate.

GDI  – 

Troubleshooting

13A-12

INSPECTION CHART FOR DIAGNOSIS CODES

Code No.

Diagnosis item

Reference page

P0100

Air flow sensor system

13A-14

P0105

Barometric pressure sensor system

13A-16

P0110

Intake air temperature sensor system

13A-18

P0115

Engine coolant temperature sensor system

13A-19

P0120



Throttle position sensor 1 (1st channel) system

13A-22

P0125

Feedback system

13A-24

P0130

Oxygen sensor (front) system <sensor 1>

13A-25

P0135

Oxygen sensor heater (front) system <sensor 1>

13A-27

P0136

Oxygen sensor (rear) system <sensor 2>

13A-28

P0141

Oxygen sensor heater (rear) system <sensor 2>

13A-30

P0170

Abnormal fuel system

13A-31

P0190



Abnormal fuel pressure

13A-33

P0201

No. 1 injector system

13A-34

P0202

No. 2 injector system

13A-36

P0203

No. 3 injector system

13A-37

P0204

No. 4 injector system

13A-38

P0220



Accelerator pedal position sensor (1st channel) system

13A-40

P0225



Throttle position sensor (2nd channel) system

13A-43

P0300



Ignition coil (power transistor) system

13A-44

P0301

No. 1 cylinder misfire detected

13A-46

P0302

No. 2 cylinder misfire detected

13A-46

P0303

No. 3 cylinder misfire detected

13A-46

P0304

No. 4 cylinder misfire detected

13A-46

P0325

Detonation sensor system

13A-47

P0335

Crank angle sensor system

13A-47

P0340

Camshaft position sensor system

13A-59

P0403

EGR valve system

13A-50

P0420

Catalyst malfunction

13A-51

P0443

Purge control solenoid valve system

13A-52

P0500

Vehicle speed sensor system

13A-53

P1200

Injector driver system

13A-53

P1220



Electronic-controlled throttle valve system

13A-54