Mitsubishi Galant 9G. Manual — part 1156

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-924

STEP 3. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Procedure 6 −

Other Monitor

P.13B-6

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P2066 set?

YES : Replace the PCM. Then go to Step 6.
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.00-14

.

STEP 4. Check the fuel level sensor (sub).
Check to see if the fuel level sensor is normal. Refer to GROUP
54A, Chasiss Electrical

− Combination Meters Assembly and

Vehicle Speed Sensor

− On-Vehicle Service − Fuel Level Sen-

sor Check

P.54A-104

.

Q: Is the fuel level sensor (sub) normal?

YES : Go to Step 5.
NO : Replace the fuel level sensor (sub). Then go to Step

6.

STEP 5. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Procedure 6 −

Other Monitor

P.13B-6

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P2066 set?

YES : Replace the PCM. Then go to Step 6.
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.00-14

.

STEP 6. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Procedure 6 −

Other Monitor

P.13B-6

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P2066 set?

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-925

DTC P2100: Throttle Actuator Control Motor Circuit (Open)

AK302870

GREEN-WHITE

GREEN-YELLO

W

B-06

147

6

1

THROTTLE ACTUATOR
CONTROL MOTOR

POWERTRAIN
CONTROL
MODULE

GROUNDING
CONNECTOR

141

38

34

2

6

1 2 3 4 5

A-14

(MU802755)

BLA

CK

BLA

CK

GND

GND

B-23

B-20

5

22

21

23 24 25

26 27 28 29

30 31 32 33 34

35 36 37 38

39 40 41 42 43

121 122 123 124 125 126 127

128 129 130 131 132 133

134 135 136 137 138 139 140

141 142 143 144 145 146

147 148 149 150 151 152 153

Throttle Actuator Control Motor Circuit

AK303042

THROTTLE BODY ASSEMBLY
(INCORPORATING THROTTLE
POSITION SENSOR)

B-06 (B)

CONNECTOR: B-06

AB

AK303190

CONNECTOR: A-14

A-14 (GR)

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-926

.

CIRCUIT OPERATION

• Controls the current that is applied from the PCM

(terminals No. 141, No. 147) to the throttle actua-
tor control motor (terminals No. 1, No. 2).

.

TECHNICAL DESCRIPTION

• PCM varies the direction and the amperage of

the current that is applied to the throttle actuator
control motor in order to control the opening of
the throttle valve.

.

DESCRIPTIONS OF MONITOR METHODS

Motor circuit current 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.

• The output voltage of the (main) throttle position

sensor minus the proposed output voltage
becomes 0.1 volt or more.

• The output voltage of the (sub) throttle position

sensor minus the proposed output voltage
becomes 0.1 volt or more.

or

• Battery positive voltage is higher than 8.3 volts.

• The proposed output voltage minus the output

voltage of the (main) throttle position sensor
becomes 1 volt or more.

• The proposed output voltage minus the output

voltage of the (sub) throttle position sensor
becomes 1 volt or more.

Judgement Criteria

• The output voltage of the (main) throttle position

sensor minus the learning value of the middle
-opened degree becomes 0.2 volt or less for 0.2
second.

or

• The output voltage of the (sub) throttle position

sensor minus the learning value of the middle
-opened degree becomes 0.2 volt or less for 0.2
second.

.

OBD-II DRIVE CYCLE PATTERN

None.

.

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

• Throttle actuator control motor failed.

• Open throttle actuator control motor circuit, har-

ness damage, or connector damage.

• PCM failed.

AK303191

CONNECTORS: B-20, 23

PCM

AB

AIR CLEANER

B-20

B-23

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-927

DIAGNOSIS

Required Special Tools:

• MB991958: Scan tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Check harness connector B-06 at throttle actuator
control motor 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 8.

STEP 2. Check the throttle actuator control motor.
(1) Disconnect the connector B-06.

(2) Measure the resistance between throttle actuator control

motor side connector terminal No. 1 and No. 2.

Standard value: 0.3

− 80 ohms [at 20°C (68°F)]

Q: Is the measured resistance between 0.3 and 80 ohms [at

20

°C (68°F)]?

YES : Go to Step 3.
NO : Replace the throttle body assembly. Then go to Step

8.

2 1

6 5 4 3

AK303044

HARNESS
CONNECTOR:
COMPONENT SIDE

B-06 (B)

CONNECTOR: B-06

AB

2 1

6 5 4 3

AK303044

HARNESS
CONNECTOR:
COMPONENT SIDE

B-06 (B)

CONNECTOR: B-06

AB

6

1 2 3 4 5

AK202992

THROTTLE ACTUATOR
CONTROL MOTOR
CONNECTOR

AB