Mitsubishi Montero (2004+). Manual - part 302

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-695

STEP 9. Check for harness damage between MFI relay 
connector B-22X (terminal No. 1) and throttle actuator 
control motor relay connector B-23X (terminal No. 4).
Q: Is the harness wire in good condition?

YES : Repair harness wire between throttle actuator control 

motor relay connector B-23X (terminal No. 2) and 
PCM connector D-132 (terminal No. 15) because of 
harness damage. Then go to Step 14.

NO :  Repair it. Then go to Step 14.

STEP 10. Check connector D-132 and D-136 at PCM for 
damage.
Q:  Is the connector in good condition?

YES : Go to Step 11.
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 14.

AK200951

2 1

3

4

B-22X

AB

CONNECTOR: B-22X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201172

2 1

3

4

B-23X

AB

CONNECTOR: B-23X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

2

3

4

5

6

7

8

9

1

10

14

15

16

17

18

19

20

21

22

23

24

25

26

27

11

12

13

AK201566

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

CONNECTORS: D-132, D-136

D-132 HARNESS CONNECTOR: 
COMPONENT SIDE

PCM

D-132(GR) D-136(GR)

AB

D-136 HARNESS CONNECTOR: 
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-696

STEP 11. Check for harness damage between fusible link 
(5) and throttle actuator control motor relay connector 
B-23X (terminal No. 3).
Q: Is the harness wire in good condition?

YES : Go to Step 12.
NO :  Repair it. Then go to Step 14.

STEP 12. Check for harness damage between throttle 
actuator control motor relay connector B-23X (terminal No. 
1) and PCM connector D-136 (terminal No. 132).
Q: Is the harness wire in good condition?

YES : Go to Step 13.
NO :  Repair it. Then go to Step 14.

AK201172

2 1

3

4

B-23X

AB

CONNECTOR: B-23X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201172

2 1

3

4

B-23X

AB

CONNECTOR: B-23X

HARNESS 
CONNECTOR: 
COMPONENT SIDE

AK201170

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

CONNECTOR: D-136

PCM

D-136(GR)

HARNESS CONNECTOR: 
COMPONENT SIDE

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-697

STEP 13. 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 P0657 set?

YES : Replace the PCM. Then go to Step 14.
NO :  It can be assumed that this malfunction is intermittent. 

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

P.00-6

.

STEP 14. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).
(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 P0657 set?

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

AK302970

AB

MB991911

MB991824

MB991827

AK302970

AB

MB991911

MB991824

MB991827

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-698

DTC P0660: Intake Manifold Tuning Solenoid Circuit Malfunction

WHITE-

BLA

C

K

WHITE-

BLA

C

K

GREEN-WHITE

AK201144

RED

MFI RELAY

BATTERY

4

2

1

3 4

1 2

B-22X

2

4

3

1

POWERTRAIN
CONTROL
MODULE (PCM)

INTAKE MANIFOLD
TUNING SOLENOID

B-04

(MU802722)

Intake Manifold Tuning 

Solenoid Circuit

1

2

1

2

3

5

6 7 8 9

4

20

21 22

232425

2627

10111213

14 15

16 1718

19

D-132

(MU803802)

AK200970AB

B-04(B)

CONNECTOR: B-04

VARIABLE 
INDUCTION 
CONTROL 
SOLENOID

AK201038

CONNECTOR: D-132

AB

PCM

D-132(GR)