Mitsubishi Montero (2002-2004). Manual — part 692
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-465
STEP 13. Check the harness wires between PCM
connector D-134 terminal 82 and fuel tank differential
pressure sensor connector G-05 terminal 1 for damage.
Q: Are the harness wires in good condition?
YES : It can be assumed that this malfunction is intermittent.
(Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points
− How to Cope with
Intermittent Malfunction
NO : Repair the damaged harness wires. Go to Step 15.
AC203997
CONNECTOR: D-134
AC
D-134 (GR)
PCM
D-134 HARNESS CONNECTOR:
HARNESS SIDE
64
63
65 66 67 68
62
61
69 70 71 72 73
74 75 76 77 78 79 80 81 82
83 84
85 86 87
88 89
ACX00218
CONNECTOR : G-05
AR
G-05 (B)
SECOND SEAT UNDER
SERVICE HOLE
G-05 HARNESS
CONNECTOR:
COMPONENT SIDE
1
2
3
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-466
STEP 14. Using scan tool MB991502, check data list item
73: Fuel Tank Differential Pressure Sensor.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Disconnect hose F from the evaporative emission canister
side, and plug the hose.
(3) Turn the ignition switch to the "ON" position.
(4) Remove the fuel cap.
(5) Set scan tool MB991502 to the data reading mode for item
73, Fuel Tank Differential Pressure Sensor.
• The fuel tank pressures reading on the scan tool should
be
−3.3 to 3.3 kPa (−0.97 to 0.97 inHg).
(6) Connect an evaporative emission system pressure pump to
the fuel tank filler tube and pressurize the fuel tank.
• The fuel tank pressure reading should increase.
(7) Disconnect an evaporative emission system pressure pump
and connect hose F.
(8) Turn the ignition switch to the "LOCK" (OFF) position and
disconnect scan tool MB991502.
Q: Is the fuel tank pressure between
−3.3 and 3.3 kPa (−
0.97 and 0.97 inHg)?
YES : It can be assumed that this malfunction is intermittent.
(Refer to GROUP 00, How to Use Troubleshooting/
Inspection Service Points
− How to Cope with
Intermittent Malfunction
NO : Replace the PCM. Go to Step 15.
STEP 15. Perform the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. [Refer to
GROUP 13A, Trouble Code Diagnosis
− OBD-II Drive Cycle
(Procedure 1: Evaporative Emission Control system Leak
Monitor)
(2) Read the diagnostic trouble code (DTC).
Q: Is DTC P0452 set?
YES : Go to Step 2.
NO : The procedure is complete.
ACX01539
16-PIN
MB991502
AC
AC102602 AC
HOSE F
ACX01358
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-467
DTC P0453: Evaporative Emission System Pressure Sensor High Input
AC203991
SYSTEM DIAGRAM
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
Q
S
R
P
FUEL TANK
CHECK VALVE B
CHECK VALVE A
EVAPORATIVE
EMISSION
PURGE
SOLENOID
EVAPORATIVE EMISSION
VENTILATION SOLENOID
EVAPORATIVE
EMISSION
CANISTER
OVER VENT
VALVE MODULE
VENT PIPE
ASSEMBLY
AC
FUEL TANK DIFFERENTIAL
PRESSURE SENSOR
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DIAGNOSTIC TROUBLE CODE PROCEDURES
13Ac-468
AC203992
Fuel Tank Differential Pressure Sensor Circuit
AB
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