Mitsubishi Outlander GS45X. Manual — part 924

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-629

DTC SET CONDITIONS

Check Condition

• Battery positive voltage is higher than 6.3 volts.

Judgement Criterion

• Throttle position sensor power voltage should be

4.1 volts 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:)

• ECM failed.

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. 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 Codes 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

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-630

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

AK703890

RED

20A

WHITE

WHITE

WHITE

A-33X

4

3

1

2

22

15A

8

OFF

ON

A-21X

B-11

2

4

3

BR

O

WN-WHITE

THROTTLE ACTUATOR
CONTROL MOTOR
POWER SUPPLY

SKY BLUE

1

OFF

ON

72

84

AB

36

FUSIBLE LINK

RELAY BOX
(ENGINE COMPARTMENT)

TO ECM

ENGINE CONTROL MODULE

MFI
RELAY

THROTTLE ACTUATOR CONTROL MOTOR RELAY CIRCUIT

THROTTLE ACTUATOR
CONTROL MOTOR RELAY

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-631

.

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 volt-

age 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 system should be 6.0 volts or less for 0.35
seconds.

.

OBD-II DRIVE CYCLE PATTERN

None.

.

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

• Malfunction of throttle actuator control motor

relay.

• Connector damage.

• Harness damage.

• ECM failed.

AK700399AB

MFI relay

A-33X

Connector: A-33X

AK700426AB

A-21X

Connector: A-21X

Throttle actuator
control motor relay

AK700402AB

ECM

B-11 (GR)

Connector: B-11

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-632

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 and harness connector B-10
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 7.

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 (approximately 70 ohms).

(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.

• Should be less than 2 ohms. (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 7.

AK700256

1

2

3
4

AB

Throttle actuator
control motor
relay side connector

AK700257

1

2

3
4

AB

Throttle actuator
control motor
relay side
connector