Mitsubishi Outlander GS45X. Manual — part 688

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-575

STEP 1. Using scan tool MB991958, read the diagnostic
trouble code (DTC).

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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0642 set?

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

register the ID code. Refer to GROUP 42B, Diagnosis
− ID Code Registration Judgment Table <Vehicles

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

.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-576

DTC P0657: Throttle Actuator Control Motor Relay Circuit Malfunction

1

3

2

4

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

AK604254

RED

20A

WHITE

WHITE

WHITE

A-33X

4

3

1

2

22

15A

8

OFF

ON

A-21X

B-11

2

4

3

SKY BLUE

BR

O

WN-WHITE

1

OFF

ON

72

84

AC

36

FUSIBLE LINK

MFI
RELAY

RELAY BOX
(ENGINE COMPARTMENT)

ENGINE CONTROL MODULE

TO ECM

THROTTLE ACTUATOR CONTROL MOTOR RELAY CIRCUIT

THROTTLE ACTUATOR
CONTROL MOTOR RELAY

THROTTLE ACTUATOR
CONTROL MOTOR
POWER SUPPLY

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

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.

CIRCUIT OPERATION

• Battery positive voltage is applied to the throttle

actuator control motor relay terminal (terminal
No. 4).

• Battery positive voltage is applied to the throttle

actuator control motor relay terminal (terminal
No. 2) from the MFI relay (terminal No. 2).

• ECM (terminal No. 84) applies current to the

throttle actuator control motor relay coil by turning
ON the power transistor in the unit in order to turn
the relay ON.

• When the throttle actuator control motor relay

turns ON, battery positive voltage is supplied by
the throttle actuator control motor relay (terminal
No. 3) to the ECM (terminal No. 72).

.

TECHNICAL DESCRIPTION

• When the ignition switch ON signal is input into

the ECM, the ECM turns ON the throttle actuator
control motor relay.

.

DESCRIPTIONS OF MONITOR METHODS

Throttle actuator control motor relay circuit voltage is

smaller than the specified value.

.

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

Check Condition

• Battery positive voltage is higher than 8.3 volts.

Judgement Criterion

• The power line voltage of the electronic controlled

throttle valve system should be 6.0 volts or less
for 0.35 second.

.

OBD-II DRIVE CYCLE PATTERN

None.

.

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

• Throttle actuator control motor relay failed.

• Open or shorted throttle actuator control motor

relay circuit, harness damage, or connector dam-
age.

• ECM failed.

AK704141

Throttle actuator
control motor relay

AB

Connector: A-21X

A-21X

AK704088

MFI relay

AB

Connector: A-33X

A-33X

AK704097AB

Connector: B-11

B-11 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-578

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 A-21X at throttle
actuator control motor relay 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 14.

STEP 2. Check the throttle actuator control motor relay.
(1) Remove the throttle actuator control motor relay.
(2) Check for continuity between the throttle actuator control

motor relay terminal No. 1 and No. 2.

• There should be continuity.

(3) Use jumper wires to connect throttle actuator control motor

relay terminal No. 2 to the positive battery terminal and
terminal No. 1 to the negative battery terminal.

(4) Check the continuity between the throttle actuator control

motor relay terminal No. 3 and No. 4 while connecting and
disconnecting the jumper wire at the negative battery
terminal.

• Continuity (2 ohms or less) <Negative battery terminal

connected.>

• Should be open loop. <Negative battery terminal discon-

nected.>

(5) Install the throttle actuator control motor relay.
Q: Is the measured resistance normal?

YES : Go to Step 3.
NO : Replace the throttle actuator control motor relay.

Then go to Step 14.

AK604234

1

2

3
4

Throttle actuator control
motor relay side connector

AB

AK604235

1

2

3
4

AB

Throttle actuator control
motor relay side connector