Mitsubishi Galant 9G. Manual — part 681

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-166

STEP 8. Check for harness damage between throttle
position sensor connector B-06 (terminal No. 5) and PCM
connector B-22 (terminal No. 94).
Q: Is the harness wire in good condition?

YES : Go to Step 9.
NO : Repair it. Then go to Step 11.

AK303818

1

6 5 4 3 2

AB

CONNECTOR: B-06

B-06 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AK303016

104

96

94

95

93 92 91

99 98 97

103 102 101 100

108 107 106 105

113 112 111 110 109

CONNECTOR: B-22

B-22 (B)

PCM

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AIR CLEANER

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-167

STEP 9. Check for open circuit, short circuit to ground and
harness damage between throttle position sensor
connector B-06 (terminal No. 6) and PCM connector B-22
(terminal No. 98).
Q: Is the harness wire in good condition?

YES : Go to Step 10.
NO : Repair it. Then go to Step 11.

STEP10. Replace the throttle body assembly.
(1) Replace the throttle body assembly.
(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 P0122 set?

YES : Replace the PCM. Then go to Step 11.
NO : The inspection is complete.

AK303818

1

6 5 4 3 2

AB

CONNECTOR: B-06

B-06 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

AK303016

104

96

94

95

93 92 91

99 98 97

103 102 101 100

108 107 106 105

113 112 111 110 109

CONNECTOR: B-22

B-22 (B)

PCM

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AIR CLEANER

AK303818

1

6 5 4 3 2

AB

CONNECTOR: B-06

B-06 (B)

HARNESS
CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-168

STEP 11. 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 P0122 set?

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

AK303804AB

MB991910

DATA LINK
CONNECTOR

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-169

DTC P0123: Throttle Position Sensor (main) Circuit High Input

CAUTION

If DTC P0123 has been set, TCL related DTC
U1120 is also set. After P0123 has been diag-
nosed, don't forget to erase DTC U1120.

.

6

1 2 3 4 5

100

99

92

91

93 94 95

96 97 98

101 102 103 104

105 106 107 108

109 110 111 112 113

AK400878

YELLO

W

-RED

WHITE-RED

BLA

CK-WHITE

B-06

94

5

THROTTLE POSITION
SENSOR (MAIN)

HALL IC

POWERTRAIN
CONTROL
MODULE (PCM)

98

95

6

3

Throttle Position Sensor (main) Circuit

B-22

5 V

AK303817AB

CONNECTOR: B-06

B-06 (B)

THROTTLE
ACTUATOR
CONTROL
MOTOR

THROTTLE
POSITION
SENSOR

AK303043

CONNECTOR: B-22

B-22 (B)

PCM

AB

AIR CLEANER