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Mitsubishi Outlander GS45X. Manual - part 936

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-677

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Check harness connector C-123 at accelerator
pedal position sensor and harness connector B-11 at ECM
for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 4.

STEP 2. Check the continuity at accelerator pedal position
sensor harness side connector C-123.
(1) Disconnect the connector C-123 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 3.
NO : Repair it. Then go to Step 4.

STEP 3. Using scan tool MB991958, check data list item 11:
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

11, Accelerator Pedal Position Sensor (main).

• Output voltage is between 0.9 and 1.1 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 : Go to Step 4.
NO : Replace the accelerator pedal position sensor. Then

go to Step 4.

AK700281

6 5 4 3 2

C-123 harness
connector:
component side

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-678

STEP 4. 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) Read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P2123 set?

YES : Replace the ECM. When the ECM is replaced,

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

NO : It can be assumed that this malfunction is intermittent.

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

− How to

Cope with Intermittent Malfunctions

P.00-15

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-679

DTC P2127: Accelerator Pedal Position Sensor (sub) Circuit Low Input

CIRCUIT OPERATION

• A 5-volt power supply is applied on the accelera-

tor pedal position sensor (sub) power terminal
(terminal No. 4) from the ECM (terminal No. 78).

• A voltage that is according to the accelerator

opening angle is sent to the ECM (terminal No.
77) from the accelerator pedal position sensor
(sub) output terminal (terminal No. 6).

• The ground terminal (terminal No. 5) is grounded

with ECM (terminal No. 79).

AK700163

71 72 73 74 75 76 77 78 79 80 81 82

83 84 85 86 87 88 89 90 91 92 93 94

95 96 97 98 99

100 101 102 103 104

112 113 114

109

108

107

110 111

115 116

106

105

118

117

1 2 3 4 5

5 V

YELLO

-RED

YELLO

-BLUE

BLA

CK-WHITE

B-11

C-123

HALL IC

5 V

ACCELERATOR PEDAL POSITION SENSOR (SUB) CIRCUIT

ACCELERATOR
PEDAL POSITION
SENSOR (SUB)

ENGINE
CONTROL
MODULE

AK700431

Accelerator pedal
position sensor

C-123 (B)

Connector: C-123

AK700402AB

ECM

B-11 (GR)

Connector: B-11

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-680

TECHNICAL DESCRIPTION

• The accelerator pedal position sensor (sub) out-

puts voltage which corresponds to the accelera-
tor pedal depression.

• The ECM checks whether the voltage is within a

specified range.

DESCRIPTIONS OF MONITOR METHODS

Accelerator pedal position sensor (sub) output volt-

age is out of specified range.

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

DTC SET CONDITIONS

Logic Flow Chart

Check Condition

• Ignition switch is "ON" position.

Judgement Criterion

• Accelerator pedal position sensor (sub) output

voltage is 0.2 volt or less for 0.3 second.

OBD-II DRIVE CYCLE PATTERN

None.

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

• Accelerator pedal position sensor failed.

• Connector damage.

• Harness damage.

• ECM failed.

AK800588

Good

Malfunction

End

Output voltage <= 0.2V

Start

Yes

Continuous

failure for 0.3sec

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