Mitsubishi Eclipse. Manual — part 367

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-11

HOW TO CONNECT THE SCAN TOOL (MUT-III)

Refer to GROUP 13A, Diagnostic Function

− How to Connect

The Scan Tool (MUT-III)

P.13A-5

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HOW TO READ AND ERASE DIAGNOSTIC
TROUBLE CODE

Refer to GROUP 13A, Diagnostic Function

− How to Read and

Erase Diagnostic Trouble Codes

P.13A-5

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PROVISIONAL DTCs [MUT-III OBD-II Test
Mode-Results (Mode 7)]

Refer to GROUP 13A, Diagnostic Function

− Provisional DTCs

[MUT-III OBD-II Test Mode-Results (Mode 7)]

P.13A-5

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MODE 6 REFERENCE TABLE

The engine powertrain control module (ECM) <M/T> or powertrain control module (PCM) <A/T> monitors the
condition of emission control system.
By selecting MODE 6 using scan tool, Test Result and Limit Value (minimum) *1 or (maximum) *2 about the
main items of emission control system which ECM <M/T> or PCM <A/T> monitors can be confirmed. The
value at the last monitoring is output by ECM <M/T> or PCM <A/T> as a test result.

TEST
ID

MONITORING
ITEM

SIMPLE TECHNICAL DESCRIPTION INDICATION OF SCAN

TOOL

CONVERSION
COEFFICIENT
IN USING
GENERAL
SCAN TOOL

01

Catalyst
monitor (Bank
1)

ECM <M/T> or PCM <A/T> monitors
the deterioration of catalyst at right
bank side by the output frequency ratio
between right bank heated oxygen
sensor (front) and right bank heated
oxygen sensor (rear).

Catalyst Frequency
Ratio Bank 1
Test Result and Limit
Value (max.)

× 0.0039

02

Catalyst
monitor (Bank
2)

ECM <M/T> or PCM <A/T> monitors
the deterioration of catalyst at left bank
side by the output frequency ratio
between left bank heated oxygen
sensor (front) and left bank heated
oxygen sensor (rear).

Catalyst Frequency
Ratio Bank 2
Test Result and Limit
Value (max.)

× 0.0039

03

EGR monitor

ECM <M/T> or PCM <A/T> monitors
the operation of EGR system by the
pressure difference of intake manifold
between before and after introduction
of EGR using the manifold absolute
pressure sensor.

EGR Monitor Pressure
Value
Test Result and Limit
Value (min.) kPa

× 0.43 kPa

06

Evaporation
leak monitor
(Small leak)

ECM <M/T> or PCM <A/T> monitors
the leak of fuel evaporation gas by the
reduction of vacuum in tank after
appointed time using the fuel tank
differential pressure sensor after
making the fuel tank and the fuel line
vacuum.

EVAP Leak Mon. 1mm
Pressure Value
Test Result and Limit
Value (max.) kPa

× 0.032 kPa

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-12

NOTE: *1 : Minimum value: The test fails if test value is less than this value.
NOTE: *2 : Maximum value: The test fails if test value is greater than this value.

DIAGNOSTIC BY DIAGNOSTIC TEST MODE II
(INCREASED SENSITIVITY)

Refer to GROUP 13A, Diagnostic Function

− Diagnostic by

Diagnostic Test Mode II (Increased Sensitivity)

P.13A-5

.

07

Evaporation
leak monitor
(Gross leak)

ECM <M/T> or PCM <A/T> monitors
the leak of fuel evaporation gas by
checking whether the pressure can be
reduced (the amount of pressure
reduction) using the fuel tank
differential pressure sensor after
sealing the fuel tank and the fuel line.

EVAP Leak Mon. Gross
Pressure Value
Test Result and Limit
Value (min.) kPa

× 0.032 kPa

08

Evaporation
leak monitor
(Very small
leak)

ECM <M/T> or PCM <A/T> monitors
the leak of fuel evaporation gas by the
reduction of vacuum in tank after
appointed time using the fuel tank
differential pressure sensor after
making the fuel tank and the fuel line
vacuum.

EVAP Leak Mon.
0.5mm Pressure Value
Test Result and Limit
Value (max.) kPa

× 0.032 kPa

09

Right bank
heated oxygen
sensor (front)
monitor
(Rich/Lean
Switching)

ECM <M/T> or PCM <A/T> monitors
the deteriorated condition of the right
bank heated oxygen sensor (front) by
checking the lean/rich Switching
frequency of the right bank heated
oxygen sensor (front).

HO2S B1 SENSOR1
Rich/Lean Switching
Count
Test Result and Limit
Value (min.)

× 1 count

0A

Left bank
heated oxygen
sensor (front)
monitor
(Rich/Lean
Switching)

ECM <M/T> or PCM <A/T> monitors
the deteriorated condition of the left
bank heated oxygen sensor (front) by
checking the lean/rich Switching
frequency of the left bank heated
oxygen sensor (front).

HO2S B2 SENSOR1
Rich/Lean Switching
Count
Test Result and Limit
Value (min.)

× 1 count

0B

Right bank
heated oxygen
sensor (rear)
monitor
(Voltage)

ECM <M/T> or PCM <A/T> checks the
output voltage of the right bank heated
oxygen sensor (rear) in order to
monitor whether the heated oxygen
sensor (rear) output is stuck.

HO2S B1 SENSOR2
Change in Volt
Test Result and Limit
Value (min.)

× 19.5 millivolts

0C

Left bank
heated oxygen
sensor (rear)
monitor
(Voltage)

ECM <M/T> or PCM <A/T> checks the
output voltage of the left bank heated
oxygen sensor (rear) in order to
monitor whether the left bank heated
oxygen sensor (rear) output is stuck.

HO2S B2 SENSOR2
Change in Volt
Test Result and Limit
Value (min.)

× 19.5 millivolts

TEST
ID

MONITORING
ITEM

SIMPLE TECHNICAL DESCRIPTION INDICATION OF SCAN

TOOL

CONVERSION
COEFFICIENT
IN USING
GENERAL
SCAN TOOL

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-13

INSPECTION USING SCAN TOOL MB991958,
DATA LIST AND ACTUATOR TESTING

Refer to GROUP 13A, Diagnostic Function

− Inspection Using

scan Tool MB991958, Data List and Actuator Testing

P.13A-5

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ON-BOARD DIAGNOSTICS

The engine control module (ECM) <M/T> or powertrain control module (PCM) <A/T> monitors the input/out-
put signals (some signals all the time and others under specified conditions) of the ECM <M/T> or PCM
<A/T>. When a malfunction continues for a specified time or longer after the irregular signal is initially moni-
tored, the ECM <M/T> or PCM <A/T> judges that a malfunction has occurred. After the ECM <M/T> or PCM
<A/T> first detects a malfunction, a diagnostic trouble code is recorded when the engine is restarted and the
same malfunction is re-detected. However, for items marked with a "*", a diagnostic trouble code is recorded
on the first detection of the malfunction. There are 105 diagnostic items. The diagnostic results can be read
out with a scan tool. Since memorization of the diagnostic trouble codes is backed up directly by the battery,
the diagnostic results are memorized even if the ignition key is turned off. The diagnostic trouble codes will,
however, be erased when the battery terminal or the ECM <M/T> or PCM <A/T> connector is disconnected.
In addition, the diagnostic trouble code can also be erased by turning the ignition switch to "ON" position and
sending the diagnostic trouble code erase signal from scan tool MB991958 (MUT-III) to the ECM <M/T> or
PCM <A/T>.
NOTE: If the sensor connector is disconnected with the ignition switch turned on, the diagnostic trouble code
is memorized. In this case, send the diagnostic trouble code erase signal to the ECM <M/T> or PCM <A/T> in
order to erase the diagnostic memory.
The 105 diagnostic items are all indicated sequentially from the smallest code number. The ECM <M/T> or
PCM <A/T> records the engine operating condition when the diagnostic trouble code is set. This data is
called "freeze frame" data. This data can be read by using the scan tool, and can then be used in simulation
tests for troubleshooting. Data items are as follows.
NOTE: If the ECM <M/T> or PCM <A/T> detects multiple malfunctions, the ECM <M/T> or PCM <A/T> stores
the data for only the first item that was detected.
However, if the ECM <M/T> or PCM <A/T> detects a misfire or a fuel system malfunction, ECM <M/T> or
PCM <A/T> stores the data by giving priority to the misfire or fuel system malfunction, regardless of the order
in which the malfunction was detected.
NOTE: As for diagnostic trouble code P1603, "freeze frame" data is not memorized.

MUT-III SCAN TOOL
DISPLAY

ITEM
NO.

DATA ITEM

UNIT or STATE

ECT SENSOR

21

Engine coolant temperature sensor

°C or °F

ENGINE LOAD

87

Calculation load value

%

ENGINE SPEED

22

Crankshaft position sensor (engine speed) r/min

IAT SENSOR

13

Intake air temperature sensor

°C or °F

IG. TIMING ADV

44

Ignition coils and ignition power transistor

deg

LONG TRIM B1

81

Long-term fuel compensation (trim) bank1 %

LONG TRIM B2

83

Long-term fuel compensation (trim) bank2 %

MAP/MDP SENSOR

95

Manifold absolute pressure sensor

kPa

SHORT TRIM B1

82

Short-term fuel compensation (trim) bank1 %

SHORT TRIM B2

84

Short-term fuel compensation (trim) bank2 %

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-14

OBD- II DRIVE CYCLE

All kinds of diagnostic trouble codes (DTCs) can be monitored by carrying out a test drive according to the fol-
lowing six drive cycle pattern. In other words, doing such a drive regenerates any kind of trouble which
involves illuminating the Malfunction Indicator Lamp (SERVIVE ENGINE SOON or Check Engine Lamp) and
verifies the repair procedure has eliminated the trouble (the Malfunction Indicator Lamp (SERVIVE ENGINE
SOON or Check Engine Lamp) is no longer illuminated).

CAUTION

Two technicians should always be in the vehicle when carrying out a test drive.
NOTE: Check that the diagnosis trouble code (DTC) is not output before traveling in the drive cycle pattern.
Erase the DTC if it has been output.
DRIVE CYCLE PATTERN LIST

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SYS. STATUS B1

88

Fuel control system status (bank 1)

• Open loop

• Closed loop

• Open loop-drive condition

• Open loop-DTC set

• Closed loop-O

2

(rear) failed

SYS. STATUS B2

89

Fuel control system status (bank 2)

• Open loop

• Closed loop

• Open loop-drive condition

• Open loop-DTC set

• Closed loop-O

2

(rear) failed

TP SENSOR

8A

Throttle position sensor

%

VAF/MAF SENSOR

12

Volume airflow sensor (mass airflow rate)

gm/s

VSS

24

Vehicle speed sensor

km/h or mph

MUT-III SCAN TOOL
DISPLAY

ITEM
NO.

DATA ITEM

UNIT or STATE

PROCEDURE MONITOR ITEM

DIAGNOSTIC TROUBLE CODE (DTC)

1

Evaporative emission system leak monitor

P0441, P0442, P0451, P0452, P0453,
P0455, P0456

2

Fuel trim monitor

P0171, P0172, P0174, P0175

3

Catalytic converter monitor

P0421, P0431

4

Heated oxygen sensor monitor

P0133, P0139, P0153, P0159

5

Exhaust gas recirculation (EGR) system monitor

P0401

6

Other monitor

Main components

P0106, P0107, P0108, P0134, P0154,
P0300, P0301, P0302, P0303, P0304,
P0305, P0306, P0506, P0507,

Sensors and switches

P0101, P0102, P0106, P0107, P0108,
P0111, P0112, P0113, P0116, P0117,
P0118, P0121, P0122, P0123, P0125,
P0181, P0182, P0183, P0325, P0335,
P0340, P0461 P2227, P2228, P2229

Wire breakage and
short circuit

P0130, P0131,P0132, P0135, P0136,
P0137, P0138, P0141, P0150, P0151,
P0152, P0155, P0156, P0157, P0158,
P0161, P0201, P0202, P0203, P0204,
P0205, P0206, P0403, P0443, P0446