Mitsubishi Galant (2004+). Manual — part 1015
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-877
Check Conditions
• Ignition switch is "ON" position.
Judgement Criteria
• Accelerator pedal position sensor (main) output
voltage should be 4.8 volts or higher for 0.3 sec-
ond.
.
OBD-II DRIVE CYCLE PATTERN
None.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
• Accelerator pedal position sensor failed.
• Open accelerator pedal position sensor (main)
circuit, harness damage or connector damage.
• PCM failed.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
STEP 1. Using scan tool MB991958, check data list item 78:
Accelerator Pedal Position Sensor (main).
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
78, Accelerator Pedal Position Sensor (main).
• Output voltage is between 0.7 and 1.3 volts when foot is
released from accelerator pedal.
• Output voltage is 4.0 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
.
NO : Go to Step 2.
AK303804AB
MB991910
DATA LINK
CONNECTOR
MB991824
MB991827
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-878
STEP 2. Check harness connector C-24 at accelerator
pedal position sensor for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 3.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 8.
STEP 3. Check the continuity at accelerator pedal position
sensor harness side connector C-24.
(1) Disconnect the connector C-24 and measure at the harness
side.
(2) Measure the continuity between terminal No. 2 and ground.
• Should be less than 2 ohms.
Q: Does continuity exist?
YES : Go to Step 6.
NO : Go to Step 4.
AK303906
1
6 5 4 3 2
AB
C-24 (B)
CONNECTOR: C-24
HARNESS CONNECTOR:
COMPONENT SIDE
AK303906
1
6 5 4 3 2
AB
C-24 (B)
CONNECTOR: C-24
HARNESS CONNECTOR:
COMPONENT SIDE
1
6 5 4 3 2
AK203017
C-24 HARNESS
CONNECTOR:
COMPONENT SIDE
AC
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-879
STEP 4. Check harness connector B-20 at PCM for
damage.
Q: Is the harness connector in good condition?
YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 8.
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
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>
13A-880
STEP 5. Check for open circuit and harness damage
between accelerator pedal position sensor connector C-24
(terminal No. 2) and PCM connector B-20 (terminal No. 31).
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 P2123 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
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