Mitsubishi Galant (2004+). Manual — part 1020

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-897

STEP 5. Check for open circuit and harness damage
between accelerator pedal position sensor connector C-24
(terminal No. 5) and PCM connector B-20 (terminal No. 22).

Q: Is the harness wire in good condition?

YES : Go to Step 7.
NO : Repair it. Then go to Step 8.

STEP 6. Replace the accelerator pedal position sensor.

(1) Replace the accelerator pedal position sensor.
(2) Turn the ignition switch to the "ON" position.

(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P2128 set?

YES : Replace the PCM. Then go to Step 8.
NO : The procedure is complete.

AK303906

1

6 5 4 3 2

AB

C-24 (B)

CONNECTOR: C-24

HARNESS CONNECTOR:
COMPONENT SIDE

AK303092

25

21

24 23 22

29 28 27 26

34 33 32 31 30

38 37 36 35

43 42 41 40 39

CONNECTOR: B-20

B-20

PCM

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AIR CLEANER

AK303906

1

6 5 4 3 2

AB

C-24 (B)

CONNECTOR: C-24

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-898

STEP 7. Using scan tool MB991958, check data list item 77:
Accelerator Pedal Position Sensor (sub).

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK"(OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item

77, Accelerator Pedal Position Sensor (sub).

• Output voltage is between 0.4 and 1.0 volts when foot is

released from accelerator pedal.

• Output voltage is 3.7 volts or higher when accelerator

pedal is fully depressed.

(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

P.00-6

.

NO : Replace the PCM. Then go to Step 8.

STEP 8. Using scan tool MB991958, read the diagnostic
trouble code (DTC).

(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.

(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK"(OFF) position.
Q: Is DTC P2128 set?

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

AK303804AB

MB991910

DATA LINK
CONNECTOR

MB991824

MB991827

AK303804AB

MB991910

DATA LINK
CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-899

DTC P2135: Throttle Position Sensor (main and sub) Range/Performance Problem

CAUTION

If DTC P2135 has been set, TCL related DTC
U1120 is also set. After P2135 has been diag-
nosed, don't forget to erase DTC U1120.

.

THROTTLE POSITION SENSOR (MAIN AND SUB)
RANGE/PERFORMANCE PROBLEM CIRCUIT

• Refer to DTC P0122 − Throttle Position Sensor

(main) Circuit

P.13A-156

.

• Refer to DTC P0222 − Throttle Position Sensor

(sub) Circuit

P.13A-497

.

.

CIRCUIT OPERATION

• Refer to DTC P0122 − Throttle Position Sensor

(main) Circuit

P.13A-156

.

• Refer to DTC P0222 − Throttle Position Sensor

(sub) Circuit

P.13A-497

.

.

TECHNICAL DESCRIPTION

• PCM checks the throttle position sensor output

signal characteristics for abnormal conditions.

.

DESCRIPTIONS OF MONITOR METHODS
Detect malfunction if the relation between throttle

position sensor (main) and throttle position sen-
sor (sub) is wrong.

.

MONITOR EXECUTION
Continuous

.

MONITOR EXECUTION CONDITIONS (Other
monitor and Sensor)

Other Monitor (There is no temporary DTC stored

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-900

DTC SET CONDITIONS <Range/Performance problem-relation between main and sub>

Logic Flow Chart

Check Conditions

• Ignition switch is "ON" position.

• Throttle position sensor (main) output voltage is

between 0.35 and 2.5 volts.

• Throttle position sensor (sub) output voltage is

between 2.25 and 4.8 volts.

Judgement Criteria

• Voltage obtained with the formula given below is

0.3 volt or higher for 0.5 second: throttle position
sensor (main) output voltage

− [throttle position

sensor (sub) output voltage

− 2 volts]

START

END

NO

NO

NO

YES

YES

YES

MALFUNCTION

GOOD

CONTINUOUS

FAILURE FOR 0.5sec

|

TPS (MAIN) - (TPS (SUB)-2.0V)

|

> =0.3V

MONITORING

CONDITIONS

AK302047