Mitsubishi Galant. Manual — part 157

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-309

STEP 9. Check connector C-40 at PCM for damage.
Q: Is the connector in good condition?

YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection(

P.00E-2

). Then go to Step 11.

STEP 10. Check for harness damage between generator
connector B-46 terminal 4 and PCM connector C-40
terminal 54.
Q: Is the harness wire in good condition?

YES : Replace the generator. Then go to Step 11.
NO : Repair it. Then go to Step 11.

STEP 11. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to,

Procedure 6

−

Other Monitor(

P.13A-5

).

(2) Check the diagnostic trouble code (DTC).

Q: Is the DTC P1500 is output?

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

AK000280

CONNECTOR : C-40

PCM

AV

AK000568

CONNECTOR:B-46

AB

AK000280

CONNECTOR : C-40

PCM

AV

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-310

DTC P1610: Immobilizer Malfunction

TECHNICAL DESCRIPTION

•

PCM monitors the communication condition with
the immobilizer-ECU and the message from the
immobilizer-ECU, and when the abnormality is
found, PCM makes the engine not to start.

DTC SET CONDITIONS

Check Conditions

•

Ignition switch: ON

Judgment Criteria

•

When the communication error between PCM
and the immobilizer-ECU continues for 2 seconds
or more.

•

When PCM receives the communication of
prohibition for starting from the immobilizer-ECU.

TROUBLESHOOTING HINTS (The most likely

causes for this code to be set are:)

•

Malfunction of harness or connector.

•

Malfunction of immobilizer-ECU.

•

Malfunction of PCM.

DIAGNOSIS

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

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.

STEP 1. Using scan tool MB991502, read the immobilizer
diagnostic trouble code (DTC).
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the immobilizer system-DTC
(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the immobilizer system-DTC is output?

YES : Refer to GROUP 54A, Ignition Switch and

Immobilizer System

−

Diagnostic Trouble Code

Chart.

P.54A-10

NO : If DTC P1610 is output again after the MFI-DTC has

been erased, replace the PCM. Then check that the
DTC P1610 does not reset.

DTC P1751: A/T Control Relay Malfunction

TECHNICAL DESCRIPTION

•

When a malfunction of the A/T control relay is
detected, the transaxle control CPU inside the
powertrain control module (PCM) outputs a

malfunction signal to the engine control CPU
inside the PCM.

AC003081 AB

16 PIN

MB991502

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-311

DTC SET CONDITIONS

Check Conditions, Judgment Criteria

•

A/T control relay 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:)

•

A/T control relay failed.

•

Open or shorted A/T control relay 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 P1751 is output again after the MFI-DTC has

been erased, replace the PCM. Then check that the
DTC P1751 does not reset.

AC003081 AB

16 PIN

MB991502

MULTIPORT FUEL INJECTION(MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L>

13A-312

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Communication with Scan Tool Is Not Possible. (Comunication with All
Systems Is Not Possible.)

AK000476

15

14

13

12

11

10

1 2 3 4 5 6 7 8
9

16

1

1

6

4

5

11

10

12 13

15

17

16

14

19

18

8 9

7

20

2

15 16

26 27 28 29

32 33 34

17 18 19 20 21 22 23 24 25

30 31

36 37

35

38

10

11 12 13

1 2 3

4 5 6 7 8 9

14

3

RED

RED

RED

-BL

ACK

BL

ACK

BL

ACK

BL

ACK

FUSIBLE LINK(1)

C-66

C-85

C-78
MU801457

C-23

DATA LINK
CONNECTOR

38

1

18

16

4

5

JUNCTION
BLOCK

ACX02447

CONNECTOR:C-23

ACCELERATOR
PEDAL

DATA LINK
CONNECTOR

AH

AK000561

CONNECTOR:C-85

AB