Mitsubishi Galant (2004+). Manual - part 1207

 

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Mitsubishi Galant (2004+). Manual - part 1207

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-521

STEP 9. Check harness connector B-23 at PCM for 
damage.

Q: Is the connector in good condition?

YES : Go to Step 10.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 12.

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-522

STEP 10. Check for open circuit and short circuit to 
ground and harness damage between intermediate 
connector B-32 (terminal No. 4) and PCM connector B-23 
(terminal No. 133).

Q: Is the harness wire in good condition?

YES : Go to Step 11.
NO :  Repair it. Then go to Step 12.

AK303053

3

4

5

8

9

1

2

6

7

10

CONNECTOR: B-32

HARNESS CONNECTOR:
COMPONENT SIDE

AB

B-32 (B)

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-523

STEP 11. Using the oscilloscope, check the No. 5 cylinder 
injector.

(1) Disconnect the intermediate connector B-32 and connect 

the test harness MB991658 between the separated 
connectors.

(2) Connect the oscilloscope probe to injector intermediate 

connector terminal No. 4.
NOTE: When measuring with the PCM side connector, dis-
connect the all PCM connectors and connect check har-
ness special tool (MB991923) between the separated 
connectors. Then connect an oscilloscope probe to terminal 
No. 133.

(3) Start the engine and run at idle.

(4) Measure the waveform.

• The waveform should show a normal pattern similar to 

the illustration.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the waveform normal?

YES : It can be assumed that this malfunction is intermittent. 

Refer to 00E, How to Use Troubleshooting/Inspection 
Service Points 

P.00-6

.

NO :  Replace the PCM. Then go to Step 12.

STEP 12. 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-5

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0205 set?

YES : Repeat the troubleshooting.
NO :  The procedure is complete.

AK303053

3

4

5

8

9

1

2

6

7

10

CONNECTOR: B-32

HARNESS CONNECTOR:
COMPONENT SIDE

AB

B-32 (B)

1

2 3

6

7 8

4 5

9 10

AK203300

OSCILLOSCOPE

MB991658

B-32 INTERMEDIATE
CONNECTOR

AB

AKX01557 AB

A

NORMAL  WAVEFORM

A:INJECTOR DRIVE TIME

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.8L ENGINE>

13B-524

DTC P0206: Injector Circuit Malfunction - Cylinder 6

CAUTION

If DTC P0206 has been set, TCL related DTC 
U1120 is also set. After P0206 has been diag-
nosed, don't forget to erase DTC U1120.

AK302854

RED-

WHITE

GREEN-ORANGE

RED

RED-

WHITE

RED-

WHITE

127

B-17X

POWERTRAIN CONTROL
MODULE (PCM)

1

2

INJECTOR
NO. 6

B-26

MFI
RELAY

BATTERY

4

3

1

2

      B-23

2

1

Injector Circuit - Cylinder 6

3 4

1 2

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

 

 

 

 

 

 

 

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