Mitsubishi Galant (2004+). Manual - part 1297

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-881

DTC P2103: Throttle Actuator Control Motor Circuit (shorted high)

.

CIRCUIT OPERATION

• Controls the current that is applied from the PCM 

(terminals No. 147, No. 141) 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.

.

AK302871

GREEN-WHITE

GREEN-YELLO

W

B-06

147

1

THROTTLE ACTUATOR
CONTROL MOTOR

POWERTRAIN
CONTROL MODULE (PCM)

141

2

6

1 2 3 4 5

B-23

Throttle Actuator Control Motor Circuit

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

AK303042

THROTTLE BODY ASSEMBLY
(INCORPORATING THROTTLE
POSITION SENSOR)

B-06 (B)

CONNECTOR: B-06

AB

AK303059

CONNECTOR: B-23

PCM

AB

AIR CLEANER

B-23

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-882

DESCRIPTIONS OF MONITOR METHODS
Motor intelligent power device detects shorted-high 

malfunction.

.

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 Conditions

• Battery positive voltage is higher than 8.3 volts.

Judgement Criteria

• Throttle actuator control motor current is 8 

amperes or higher for 0.8 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.

• Shorted throttle actuator control motor circuit 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. 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 7.

2 1

6 5 4 3

AK303044

HARNESS
CONNECTOR:
COMPONENT SIDE

B-06 (B)

CONNECTOR: B-06

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-883

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 terminals 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 

7.

STEP 3. Check harness connector B-23 at PCM for 
damage.

Q: Is the harness connector in good condition?

YES : Go to Step 4.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 7.

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

127 126 125 124 123 122 121

133 132 131 130 129 128

140 139 138 137 136 135 134

146 145 144 143 142 141

153 152 151 150 149 148 147

AK303058

HARNESS CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-23

B-23

PCM

AB

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-884

STEP 4. Check for short circuit to ground between throttle 
actuator control motor connector B-06 (terminal No. 1) and 
PCM connector B-23 (terminal No. 147).

Q: Is the harness wire in good condition?

YES : Go to Step 5.
NO :  Repair it. Then go to Step 7.

2 1

6 5 4 3

AK303044

HARNESS
CONNECTOR:
COMPONENT SIDE

B-06 (B)

CONNECTOR: B-06

AB

127 126 125 124 123 122 121

133 132 131 130 129 128

140 139 138 137 136 135 134

146 145 144 143 142 141

153 152 151 150 149 148 147

AK303058

HARNESS CONNECTOR: 
COMPONENT SIDE

CONNECTOR: B-23

B-23

PCM

AB

AIR CLEANER