Mitsubishi Galant. Manual — part 284

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-361

STEP 13. Check for harness damage between power
steering pressure switch connector B-44 terminal 1 and
PCM connector C-40 terminal 52.
NOTE: Check harness after checking intermediate connector
B-24. If intermediate connector is damaged, repair or replace
them. Refer to GROUP 00E, Harness Connector
Inspection(

P.00E-2

). Then go to Step 14.

Q: Is the harness wire in good condition?

YES : Replace the PCM. Then go to Step 14.
NO : Repair it. Then go to Step 14.

STEP 14. Using scan tool MB991502, check data list item
27: Power Steering Pressure Switch.

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) Start the engine and run at idle.
(3) Set scan tool MB991502 to the data reading mode for item

27, Power Steering Pressure Switch.

•

If the steering wheel is stopped while idling, "OFF" will
be displayed.

•

If the steering wheel is steered while idling, "ON" will be
displayed.

(4) Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the switch operating properly?

YES : The inspection is complete.
NO : Retry the troubleshooting.

DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input)

TECHNICAL DESCRIPTION

•

When a malfunction of the park/neutral position
switch is detected, the transaxle control CPU in
the powertrain control module (PCM) outputs a

malfunction signal to the engine control CPU in
the PCM.

ACX02522

CONNECTOR:B-44

POWER
STEERING
PRESSURE
SWITCH

AF

AK000280

CONNECTOR : C-40

PCM

AV

AC003081 AB

16 PIN

MB991502

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-362

DTC SET CONDITIONS

Check Conditions, Judgment Criteria

•

Park/neutral position switch 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:)

•

Park/neutral position switch failed.

•

Open or shorted park/neutral position switch
circuit, or loose connector.

•

PCM failed.

DIAGNOSIS

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

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 P0705 is output again after the MFI-DTC has

been erased, replace the PCM. Then check that the
DTC P0705 does not reset.

DTC P0710 : Transmission Fluid Temperature Sensor Circuit Malfunction

TECHNICAL DESCRIPTION

•

When a malfunction of the fluid temperature
sensor 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

•

Oil temperature sensor 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:)

•

Oil temperature sensor failed.

•

Open or shorted oil temperature sensor 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) <3.0L>

13B-363

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 P0710 is output again after the MFI-DTC has

been erased, replace the PCM. Then check that the
DTC P0710 does not reset.

DTC P0715: Input/Turbine Speed Sensor Circuit Malfunction

TECHNICAL DESCRIPTION

•

When a malfunction of the input shaft speed
sensor 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

•

Input shaft speed sensor failure signal is input to
the engine control CPU from the transaxle control
CPU. Both CPUs are in the PCM.

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

•

Input shaft speed sensor failed.

•

Open or shorted input shaft speed sensor 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) <3.0L>

13B-364

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 P0715 is output again after the MFI-DTC has

been erased, replace the PCM. Then check that the
DTC P0715 does not reset.

DTC P0720: Output Speed Sensor Circuit Malfunction

TECHNICAL DESCRIPTION

•

When a malfunction of the output shaft speed
sensor 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

•

Output shaft speed sensor 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:)

•

Output shaft speed sensor failed.

•

Open or shorted output shaft speed sensor
circuit, or loose connector.

•

PCM failed.

DIAGNOSIS

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

AC003081 AB

16 PIN

MB991502