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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст