Mitsubishi Montero (2004+). Manual — part 133
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-19
PROCEDURE 2
.
FUEL TRIM MONITOR
DTC
P0171, P0172, P0174, P0175
Drive cycle
pattern
This monitor [from start to ignition switch "LOCK" (OFF) position] will be completed while
driving the vehicle with the following drive cycle pattern. It will take 35 minutes. You must
complete this drive twice.
NOTE: Vehicle speed and throttle opening angle should be within the shaded range.
Inspection
conditions
• Engine coolant temperature: 80 − 97°C (176 − 207°F)
• Atmospheric temperature: −10 to 60°C (14 − 140°F)
• Condition of A/T: Selector lever D range
Test
procedure
1. Engine: start
2. Accelerate until the vehicle speed is 89
− 97 km/h (55 − 60 mph).
3. Travel for 30 minutes or more while keeping the vehicle speed at 89
− 97 km/h (55 − 60
mph). (M/T: 5th speed) Carry out one gradual deceleration/acceleration returning to 89
−
97 km/h (55
− 60 mph) within 120 seconds. (During monitor)
4. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.
5. Confirm that the diagnostic trouble code (DTC) is not output.
6. If DTC P0171 is output, refer to DTC P0171
If DTC P0172 is output, refer to DTC P0172
− System too rich (Bank1)
If DTC P0174 is output, refer to DTC P0174
If DTC P0175 is output, refer to DTC P0175
− System too rich (Bank2)
AKX01346
AKX01346
(3)
(2)
(1)
(4)
30 MINUTES OR MORE
89 - 97 km/h (55 - 60 mph)
WITH 120 SECONDS
ENGINE START
IGNITION SW-
ITCH: "LOCK"
(OFF)
DURING MONITOR
97
(60)
64
(40)
32
(20)
0
100
50
0
VEHICLE SPEED
km/h (mph)
AKX01346 AB
CALCULATED
LOAD (%)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-20
PROCEDURE 3
CATALYTIC CONVERTER MONITOR
DTC
P0421, P0431
Drive cycle
pattern
This monitor [from start to ignition switch "LOCK" (OFF) position] will be completed while
driving the vehicle with the following drive cycle pattern. It will take 20 minutes. You must
complete this drive twice.
NOTE: Vehicle speed and throttle opening angle should be within the shaded range.
Inspection
conditions
• Atmospheric temperature: −10°C (14°F) or more
• A/C switch: OFF
• Condition of A/T: Selector lever D range
Test
procedure
1. Engine: start
2. Accelerate until the vehicle speed is 72 km/h (45 mph).
3. Travel for 300 seconds or more while keeping the vehicle speed at 72
− 97 km/h (45 − 60
mph).
4. Decelerate until the vehicle speed is within 56
− 64 km/h (35 − 40 mph).
5. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at
56
− 64 km/h (35 − 40 mph) and travel for 90 seconds or more. (During monitor)
6. Fully close the throttle and decelerate, and keep the deceleration state for 10 seconds.
Then, quickly accelerate until the vehicle speed reaches 56
− 64 km/h (35 − 40 mph).
Then, repeat steps 5 and 6, and complete six monitor sessions.
7. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.
8. Confirm that the diagnostic trouble code (DTC) is not output.
9. If DTC P0421 is output, refer to DTC P0421
− Warm Up Catalyst Efficiency Below
Threshold (Bank 1)
.
If DTC P0431 is output, refer to DTC P0431
− Warm Up Catalyst Efficiency Below
Threshold (Bank 2)
.
AKX01347
(3)
(2)
(1)
(4)
(5)
(5)
(6)
(6)
(6)
(5)
(5)
(7)
300 SECONDS OR MORE
72 - 97 km/h (45 - 60 mph)
PREPARATION
PERIOD
ENGINE
START
IGNITION
SWITCH:
"LOCK"
(OFF)
1 ST
MON-
ITOR
FULL
DECEL-
ERATION
FULL
DECEL-
ERATION
FULL
DECEL-
ERATION
2 ND
MON-
ITOR
6 TH
MON-
ITOR
90 SECONDS OR MORE
56 - 64 km/h (35 - 40 mph)
97
(60)
64
(40)
32
(20)
0
100
50
0
VEHICLE
SPEED
km/h (mph)
AKX01347AB
CALCULATED
LOAD (%)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-21
.
PROCEDURE 4
HEATED OXYGEN SENSOR MONITOR
DTC
P0133, P0139, P0153, P0159
Drive cycle
pattern
This monitor [from start to ignition switch "LOCK" (OFF) position] will be completed while
driving the vehicle with the following drive cycle pattern. It will take 5 minutes. You must
complete this drive twice.
NOTE: Vehicle speed and throttle opening angle should be within the shaded range.
Inspection
conditions
• Engine coolant temperature: 80°C (176°F) or more
• Atmospheric temperature: −10°C (14°F) or more
• Condition of A/T: Selector lever D range
Test
procedure
1. Engine: start
2. Accelerate until the vehicle speed is 56
− 64 km/h (35 − 40 mph).
3. While keeping the accelerator pedal opening degree constant, keep the vehicle speed at
56
− 64 km/h (35 − 40 mph) and travel for 120 seconds or more. (During monitor)
4. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.
5. Confirm that the diagnostic trouble code (DTC) is not output.
6. If DTC P0133 is output, refer to DTC P0133
− O
2
Sensor Circuit Slow Response (Bank 1
Sensor 1)
If DTC P0139 is output, refer to DTC P0139
− O
2
Sensor Circuit Slow Response (Bank 1
Sensor 2)
If DTC P0153 is output, refer to DTC P0153
− O
2
Sensor Circuit Slow Response (Bank 2
Sensor 1)
If DTC P0159 is output, refer to DTC P0159
− O
2
Sensor Circuit Slow Response (Bank 2
Sensor 2)
AKX01348
AKX01348
(3)
(2)
(1)
(4)
120 SECONDS OR MORE
56 - 64 km/h (35 - 40 mph)
ENGINE
START
IGNITION
SWITCH: "LOCK"
(OFF)
DURING MONITOR
97
(60)
64
(40)
32
(20)
0
100
50
0
VEHICLE SPEED
km/h (mph)
AKX01348 AB
CALCULATED
LOAD (%)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-22
.
PROCEDURE 5
.
EXHAUST GAS RECIRCULATION (EGR) SYSTEM MONITOR
DTC
P0401
Drive cycle
pattern
This monitor [from start to ignition switch "LOCK" (OFF) position] will be completed while
driving the vehicle with the following drive cycle pattern. It will take 10 minutes. You must
complete this drive twice.
NOTE: Vehicle speed and throttle opening angle should be within the shaded range.
Inspection
conditions
• Engine coolant temperature: 80°C (176°F) or more
• Atmospheric temperature: 5°C (41°F) or more
• A/C switch: OFF
• Condition of A/T: Selector lever D range
Test
procedure
1. Engine: start
2. Accelerate until the vehicle speed is 56
− 64 km/h (35 − 40 mph).
3. Travel for 20 seconds or more while keeping the vehicle speed at 56
− 64 km/h (35 − 40
mph).
4. Fully close the throttle from an engine speed of 2,000
− 3,000 r/min, and while keeping
the clutch engaged, decelerate to approximately 900 r/min without applying the brakes.
Do not steer the handle or turn the light ON/OFF during this time. (During monitor)
5. Accelerate until the vehicle speed reaches 56
− 64 km/h (35 − 40 mph), and travel for 20
seconds or more. Then, repeat steps 4 and 5 and complete 8 monitor sessions.
6. Return the vehicle to the shop, then turn the ignition switch to "LOCK" (OFF) position.
7. Confirm that the diagnostic trouble code (DTC) is not output.
8. If DTC P0401 is output, refer to DTC P0401
− Exhaust Gas Recirculation Flow Insufficient
detected
AKX01349
(2)
AKX01349
(3)
(5)
(5)
(5)
(5)
(2)
(1)
(4)
(4)
(4)
(4)
(4)
20 SECONDS OR MORE
56 - 64 km/h (35 - 40 mph)
20 SECONDS OR MORE
1 ST
MON-
ITOR
7 TH
MON-
ITOR
8 TH
MON-
ITOR
2 ND
MON-
ITOR
ENGINE START
IGNITION
SWITCH:"LOCK"
(OFF)
FULL
DECEL-
ERATION
FULL
DECEL-
ERATION
FULL
DECEL-
ERATION
FULL
DECEL-
ERATION
FULL
DECEL-
ERATION
64
(40)
32
(20)
0
100
50
0
VEHICLE
SPEED
km/h (mph)
AKX01349AB
CALCULATED
LOAD (%)
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