Mitsubishi Galant. Manual — part 153

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-293

STEP 1. Using scan tool MB991502, read the A/T
diagnostic trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK"(OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check the A/T-DTC.
(4) Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the A/T-DTC is output?

YES : Refer to GROUP 23A, Automatic Transaxle

Diagnosis

−

Diagnostic Trouble Code Chart(

P.23A-37

).

NO : If DTC P0725 is output again after the MFI-DTC has

been erased, replace the PCM. Then check that the
DTC P0725 does not reset.

DTC P0740: Torque Converter Clutch System Malfunction

TECHNICAL DESCRIPTION

•

When a malfunction of the torque converter
clutch or its related system is detected, the
transaxle control CPU inside the powertrain
control module (PCM) outputs a malfunction
signal to the engine control CPU in the PCM.

DTC SET CONDITIONS

Check Conditions, Judgment Criteria

•

Failed signal of the torque converter clutch or its
related system is input to the engine control CPU
from the transaxle control CPU.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

•

Torque converter clutch or its related system
failed.

•

Open or shorted torque converter clutch or its
related system circuit, or loose connector.

•

PCM failed.

DIAGNOSIS

Required Special Tools
MB991502: Scan Tool (MUT-II)

AC003081 AB

16 PIN

MB991502

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-294

STEP 1. Using scan tool MB991502, read the A/T
diagnostic trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK"(OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check the A/T-DTC.
(4) Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the A/T-DTC is output?

YES : Refer to GROUP 23A, Automatic Transaxle

Diagnosis

−

Diagnostic Trouble Code Chart(

P.23A-37

).

NO : If DTC P0740 is output again after the MFI-DTC has

been erased, replace the PCM. Then check that the
DTC P0740 does not reset.

DTC P0750: Shift Solenoid A Malfunction

TECHNICAL DESCRIPTION

•

When a malfunction of the shift solenoid A (low-
reverse solenoid) is detected, the transaxle
control CPU inside the powertrain control module
(PCM) outputs a malfunction signal to the engine
control CPU in the PCM.

DTC SET CONDITIONS

Check Conditions, Judgment Criteria

•

Low-reverse solenoid failure signal is input to the
engine control CPU from the transaxle control
CPU.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

•

Low-reverse solenoid failed.

•

Open or shorted low-reverse solenoid circuit, or
loose connector.

•

PCM failed.

DIAGNOSIS

Required Special Tools
MB991502: Scan Tool (MUT-II)

AC003081 AB

16 PIN

MB991502

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-295

STEP 1. Using scan tool MB991502, read the A/T
diagnostic trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK"(OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check the A/T-DTC.
(4) Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the A/T-DTC is output?

YES : Refer to GROUP 23A, Automatic Transaxle

Diagnosis

−

Diagnostic Trouble Code Chart(

P.13B-

367

).

NO : If DTC P0750 is output again after the MFI-DTC has

been erased, replace the PCM. Then check that the
DTC P0750 does not reset.

DTC P0755: Shift Solenoid B Malfunction

TECHNICAL DESCRIPTION

•

When a malfunction of the shift solenoid B
(underdrive solenoid) is detected, the transaxle
control CPU inside the powertrain control module
(PCM) outputs a malfunction signal to the engine
control CPU in the PCM.

DTC SET CONDITIONS

Check Conditions, Judgment Criteria

•

Underdrive solenoid failure signal is input to the
engine control CPU from the transaxle control
CPU.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

•

Underdrive solenoid failed.

•

Open or shorted underdrive solenoid circuit, or
loose connector.

•

PCM failed.

DIAGNOSIS

Required Special Tools
MB991502: Scan Tool (MUT-II)

AC003081 AB

16 PIN

MB991502

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-296

STEP 1. Using scan tool MB991502, read the A/T
diagnostic trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK"(OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check the A/T-DTC.
(4) Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the A/T-DTC is output?

YES : Refer to GROUP 23A, Automatic Transaxle

Diagnosis

−

Diagnostic Trouble Code Chart(

P.23A-37

).

NO : If DTC P0755 is output again after the MFI-DTC has

been erased, replace the PCM. Then check that the
DTC P0755 does not reset.

DTC P0760: Shift Solenoid C Malfunction

TECHNICAL DESCRIPTION

•

When a malfunction of the shift solenoid C
(Second solenoid) is detected, the transaxle
control CPU inside the powertrain control module
(PCM) outputs a malfunction signal to the engine
control CPU in the PCM.

DTC SET CONDITIONS

Check Conditions, Judgment Criteria

•

Second solenoid failure signal is input to the
engine control CPU from the transaxle control
CPU.

TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)

•

Second solenoid failed.

•

Open or shorted second solenoid circuit, or loose
connector.

•

PCM failed.

DIAGNOSIS

Required Special Tools
MB991502: Scan Tool (MUT-II)

AC003081 AB

16 PIN

MB991502