Mitsubishi Evolution X. Manual - part 265

 

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Mitsubishi Evolution X. Manual - part 265

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-37

PATTERN 15

.

PATTERN 16

Drive cycle 
pattern

Inspection 
condition

Condition of TC-SST: Shift lever "D" range

Test 
procedure

1. Start the engine with all the accessories switched OFF.
2. Accelerate until the vehicle speed is more than 50 km/h (31 mph).

• Engine speed: More than 2,500 r/min

• Engine load: More than 55 %

3. Stop the vehicle in a safe place and let the engine idle for 20 seconds. (During the 

monitor)

4. Repeat Steps 2 and 3 for 10 times.
5. Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position.
6. Start the engine and do Steps 1 to 5 again.
7. Confirm that the diagnostic trouble code (DTC) is not output.

AK402438

(3)

(2)

(1)

20 seconds

1st
mon-
itor

9th
mon-
itor

10th
mon-
itor

2nd
mon-
itor

Ignition
switch:
"LOCK" (OFF)

50 km/h
(31 mph)

Vehicle speed

AC

(3)

(2)

(2)

(3)

(3)

(2)

(5)

Idling

(2)

20 seconds

Time

Drive cycle 
pattern

Inspection 
conditions

• Engine coolant temperature: More than 65° C (149° F)

• Condition of TC-SST: Shift lever "D" range

Test 
procedure

1. Start the engine with all the accessories switched OFF.
2. Drive the vehicle at more than 50 km/h (31 mph) for 30 seconds. (During the monitor)
3. Stop the vehicle in a safe place and turn the ignition switch to "LOCK" (OFF) position.
4. Start the engine and do Steps 1 to 3 again.
5. Confirm that the diagnostic trouble code (DTC) is not output.

AK402441

(2)

(1)

(3)

30 seconds

During the monitor

50 km/h
(31 mph)

Ignition
switch:
"LOCK" (OFF)

Vehicle speed

AP

Time

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-38

.

PATTERN 17

.

PATTERN 18

.

PATTERN 19

.

PATTERN 20

.

Inspection 
conditions

Condition of TC-SST: Shift lever "D" range

Test 
procedure

1. Start the engine with all the accessories switched OFF.
2. Drive the vehicle with the accelerator pedal fully depressed for 5 seconds. (During the 

monitor)

3. Stop at safe place and turn the ignition switch to "LOCK" (OFF) position.
4. Start the engine and do Steps 1 to 3 again.
5. Confirm that the diagnostic trouble code (DTC) is not output.

Inspection 
conditions

• Engine coolant temperature: More than 82° C (180° F)

• Intake air temperature: More than −10° C (14° F)

• Barometric pressure: More than 76 kPa (22.5 inHg)

Test 
procedure

1. Start the engine with all the accessories switched OFF.
2. Accelerate until the vehicle speed is more than 1.5 km/h (1 mph).
3. Stop the vehicle in a safe place and let the engine idle for 1 minute. (During the monitor)
4. Turn the ignition switch to "LOCK" (OFF) position.
5. Start the engine and do Steps 1 to 4 again.
6. Confirm that the diagnostic trouble code (DTC) is not output.

Inspection 
conditions

• Engine coolant temperature: More than 7° C (45° F), less than 36° C (97° F)

• Intake air temperature: More than −10° C (14° F)

• Barometric pressure: More than 76 kPa (22.5 inHg)

Test 
procedure

1. Start the engine with all the accessories switched OFF.
2. Let the engine idle for 1 minute. (During the monitor)
3. Turn the ignition switch to "LOCK" (OFF) position.
4. Start the engine and do Steps 1 to 3 again.
5. Confirm that the diagnostic trouble code (DTC) is not output.

Inspection 
conditions

• Engine coolant temperature: More than 77° C (171° F), less than 87° C (189° F)

• Barometric pressure: More than 76 kPa (22.5 inHg)

Test 
procedure

1. Start the engine with all the accessories switched OFF.
2. Drive the engine at 1,200 

− 1,500 r/min for 30 seconds. (During the monitor)

3. Turn the ignition switch to "LOCK" (OFF) position.
4. Start the engine and do Steps 1 to 3 again.
5. Confirm that the diagnostic trouble code (DTC) is not output.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-39

PATTERN 21

.

PATTERN 22

.

PATTERN 23

SYSTEM READINESS TEST STATUS

.

PURPOSE

The Readiness function (also referred to as I/M 
Readiness or I/M Flags) indicates if a full diagnostic 
check has been "Completed" (is "Ready") for each 
non-continuous monitor. Enhanced I/M State Emis-
sion Programs will use the Readiness status (Codes) 
to see if the vehicle is ready for OBD-II testing. 
"Incomplete" (Not Ready) codes will be one of the 
triggers for I/M failure.

.

OVERVIEW

The ECM monitors the following main diagnosis 
items and records whether the evaluation was com-
pleted or is incomplete. The Readiness Codes are 
established for the I/M programs, thereby confirming 
that the vehicles have not been tampered with by 
erasing the diagnostic trouble code(s) (DTCs) before 

I/M testing. The Readiness Codes and DTCs can be 
reset by disconnecting the battery or by erasing the 
codes with a scan tool MB991958 (M.U.T.-III sub 
assembly). For this reason, all the Readiness Codes 
must be displayed "Complete" before I/M testing.
When the monitors run and complete, the scan tool 
MB991958 (M.U.T.-III sub assembly) will display the 
Readiness Codes as "Complete" (General Scan 
Tools display as "Ready"). When the vehicle is oper-
ating normally and the OBD-II Drive Cycle is carried 
out, the Readiness Codes will be set as "Complete" 
on the first drive cycle. For DTCs requiring two drive 
cycles to detect a fault, the second drive cycle is 
required to set the Readiness Codes as "Complete" 
if a fault is detected during the first drive cycle. If the 
fault is still there after the second drive cycle, a DTC 
will be set.

• Catalyst: P0420

• Evaporative system: P0442, P0455, P0456

• Heated oxygen sensor: P0133, P0139

• Heated oxygen sensor heater: P0031, P0032, 

P0037, P0038

Inspection 
condition

Engine coolant temperature: More than 82

° C (180° F)

Test 
procedure

1. Start the engine with all the accessories switched OFF.
2. Let the engine idle for 15 minutes. (During the monitor)
3. Turn the ignition switch to "LOCK" (OFF) position.
4. Start the engine and do Steps 1 to 3 again.
5. Confirm that the diagnostic trouble code (DTC) is not output.

Inspection 
conditions

• Intake air temperature: More than −10° C (14° F)

• Engine coolant temperature sensor: More than 7° C (45° F)

Test 
procedure

1. Start the engine with all the accessories switched OFF.
2. Let the engine idle for 4 minutes. (During the monitor)
3. Turn the ignition switch to "LOCK" (OFF) position.
4. Start the engine and do Steps 1 to 3 again.
5. Confirm that the diagnostic trouble code (DTC) is not output.

Inspection 
conditions

• Fuel temperature sensor: Less than 36° C (96° F) <Fuel tank pressure sensor monitor>

• Fuel amount at engine start: Less than 85 % <Fuel tank pressure sensor monitor>

Test 
procedure

1. Start the engine with all the accessories switched OFF.
2. Let the engine idle at the engine speed less than 1,000 r/min for 15 seconds. (During the 

monitor)

3. Turn the ignition switch to "LOCK" (OFF) position.
4. Confirm that the diagnostic trouble code (DTC) is not output.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-40

After all the Readiness Codes are displayed as 
"Complete", the technician is assured that any DTCs 
related to the monitor will be displayed if the system 
has a problem. That is why some State's I/M pro-
grams require the Readiness Code as "Complete" 
before they check for DTCs.

NOTE: After a repair is made for a DTC, the techni-
cian should drive the OBD-II Drive Cycle checking 
that the scan tool MB991958 (M.U.T.-III Sub Assem-
bly) displays all the Readiness Codes as "Complete".

FAIL-SAFE FUNCTION REFERENCE TABLE

M1131153000857

The control is carried out, which keeps the safety driving by the preset controllogic when the diagnosis code 
is output. The diagnosis code having the fail-safe function is as follows.

DTC

DIAGNOSTIC ITEM

FAIL-SAFE AND BACKUP FUNCTION

P0096

Intake air temperature circuit 
range/performance problem (sensor 2)

Control as if the intake air temperature in the 
intake manifold is 25

° C.

P0097

Intake air temperature circuit low input 
(sensor 2)

Control as if the intake air temperature in the 
intake manifold is 25

° C.

P0098

Intake air temperature circuit high input 
(sensor 2)

Control as if the intake air temperature in the 
intake manifold is 25

° C.

P0111

Intake air temperature circuit 
range/performance problem (sensor 1)

Control as if the intake air temperature is 
25

° C.

P0112

Intake air temperature circuit low input 
(sensor 1)

Control as if the intake air temperature is 
25

° C.

P0113

Intake air temperature circuit high input 
(sensor 1)

Control as if the intake air temperature is 
25

° C.

P0116

Engine coolant temperature circuit 
range/performance problem

Control as if the engine coolant temperature 
is 80

° C.

P0117

Engine coolant temperature circuit low input Control as if the engine coolant temperature 

is 80

° C.

P0118

Engine coolant temperature circuit high input Control as if the engine coolant temperature 

is 80

° C.

P0122

Throttle position sensor (main) circuit low 
input

• Throttle opening degree is restricted.

• Throttle opening degree position is in 

default position if throttle position sensor 
(sub) fails.

P0123

Throttle position sensor (main) circuit high 
input

• Throttle opening degree is restricted.

• Throttle opening degree position is in 

default position if throttle position sensor 
(sub) fails.

P0125

Insufficient coolant temperature for closed 
loop fuel control

Control as if the engine coolant temperature 
is 80

° C.

P0222

Throttle position sensor (sub) circuit low input

• Throttle opening degree is restricted.

• Throttle opening degree position is in 

default position if throttle position sensor 
(main) fails.

P0223

Throttle position sensor (sub) circuit high 
input

• Throttle opening degree is restricted.

• Throttle opening degree position is in 

default position if throttle position sensor 
(main) fails.

P0234

Turbocharger wastegate system malfunction Fuel is cut in abnormal engine overboost 

condition.

 

 

 

 

 

 

 

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