Mitsubishi Montero Sport (2004+). Manual — part 268
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-485
STEP 3. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to
Diagnostic Function
− OBD-II Drive Cycle − Procedure 5 −
Exhaust Gas Recirculation (EGR) System Monitor
.
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0401 set?
YES : Repeat the troubleshooting.
NO : The procedure is complete.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-486
DTC P0403: Exhaust Gas Recirculation Control Circuit
WHITE-
BL
ACK
WHITE-
BL
ACK
WHITE-
BL
ACK
AK301902
EGR Vacuum Regulator Solenoid Valve Circuit
RED
YELL
OW
-
RED
RED
RED
1
2
3
4
MFI
RELAY
FUSIBLE LINK (12)
22
33
2
12
23
1
6
POWERTRAIN CONTROL
MODULE (PCM)
1 2
A-11
EGR VACUUM
REGULATOR
SOLENOID VALVE
C-59
1
10
2 3 4 5 6 7 8 9
11
12 13 14 15 16 17 18 19 20 21 22
23 24 25 26 27 28 29 30 31 32 33
C-14
10
2
3 4
5 6
7 8
9
11 12 13 14 15 16 17 18 19 20
30
21 22 23
24
25
26 27 28 29
31 32 33
34 35
1
C-89
(MU803784)
JOINT
CONNECTOR (5)
1
2
3
4
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-487
.
CIRCUIT OPERATION
• The EGR vacuum regulator solenoid valve power
is supplied from the MFI relay (terminal No. 1).
• The PCM controls the EGR vacuum regulator
solenoid valve ground by turning the power tran-
sistor in the PCM "ON" and "OFF".
.
TECHNICAL DESCRIPTION
• To judge if there is open circuit in the EGR vac-
uum regulator solenoid valve drive circuit, PCM
measures the surge voltage of the EGR vacuum
regulator solenoid valve coil.
.
DESCRIPTIONS OF MONITOR METHODS
Off-surge does not occur after stepper motor is oper-
ated on to off.
.
MONITOR EXECUTION
Once per driving cycle
.
MONITOR EXECUTION CONDITIONS (Other
monitor and Sensor)
Other Monitor (There is no temporary DTC stored
in memory for the item monitored below)
• Not applicable
Sensor (The sensor below is determined to be
normal)
• Not applicable
.
AK200024
CONNECTOR: A-11
AC
A-11(BR)
THROTTLE
BODY
EGR VACUUM REGULATOR
SOLENOID VALVE
AK201000
MFI RELAY
CONNECTOR: C-59
AB
C-59
AK103911AB
CONNECTOR: C-14
C-14
AK103738AD
CONNECTOR: C-89
PCM
C-89(GR)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-488
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• Engine is being cranked.
• Battery positive voltage is at between 10 and
16.5 volts.
Judgment Criteria
• The EGR vacuum regulator solenoid valve coil
surge voltage (battery positive voltage + 2 volts)
is not detected for 0.2 second.
• The PCM monitors for this condition once during
the drive cycle.
Check Conditions
• Battery positive voltage is at between 10 and
16.5 volts.
• ON duty cycle of the EGR vacuum regulator sole-
noid valve is between 10 and 90 percent.
• ON duty cycle of the evaporative emission purge
solenoid is 0 percent.
• Evaporative emission ventilation solenoid is OFF.
• More than 1 second has elapsed after the above
mentioned conditions have been met.
Judgment Criteria
• The EGR vacuum regulator solenoid valve coil
surge voltage (battery positive voltage + 2 volts)
is not detected for 1 second.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Procedure 6
.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• EGR vacuum regulator solenoid valve failed.
• Open or shorted EGR vacuum regulator solenoid
valve circuit, harness damage or connector dam-
age.
• PCM failed.
START
END
MALFUNCTION
GOOD
MONITORING
CONDITIONS
WAS SURGE VOLTAGE
(> V
B
+2V) DETECTED?
NO
NO
YES
YES
AK204017
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст