Mitsubishi Outlander GS45X. Manual - part 954

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-749

STEP 4. Using scan tool MB991958, read the diagnostic
trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) After the MFI-DTC has been deleted, read the MFI-DTC

again.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC U1180 set?

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-750

SYMPTOM PROCEDURES

INSPECTION PROCEDURE 1: Scan Tool Communication with ECM Is Not Possible.

71 72 73 74 75 76 77 78 79 80 81 82

83 84 85 86 87 88 89 90 91 92 93 94

95 96 97 98 99

100 101 102 103 104

112 113 114

109

108

107

110 111

115 116

106

105

118

117

1 2 3 4 5 6

1516

7 8

AKA00831

12 13 14 15 16 1718 19 20 2122 2324

2 3 4 5

6 7 8 9 10 11

12 13 14 15 16 1718 19 20 2122 2324

2 3 4 5

6 7 8 9 10 11

12 13 14 15 16 1718 19 20 2122 2324

2 3 4 5

6 7 8 9 10 11

1 2 3 4

5 6 7

1 2

FUSIBLE LINK

C-309

C-317

B-11

C-317

C-301

C-309

C-01

C-04

C-33

103

J/C (CAN3)
C-01

J/C (CAN2)
C-04

C-301

C-33

ENGINE
CONTROL
MODULE

DATA LINK
CONNECTOR

C-125

ETACS-ECU

10A

RED

WHITE

ORANGE

YELLO

PINK

BLA

YELLO

-GREEN

YELLO

-BLUE

YELLO

-BLUE

VIOLET

GREEN

GREEN-

WHITE

GREEN-

WHITE

YELLO

GREEN-

RED

GREEN

CAN COMMUNICATION CIRCUIT

BLA

ANALOG
INTERFACE
CIRCUIT

INTERFACE
CIRCUIT

CAN DRIVE
CIRCUIT

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-751

CIRCUIT OPERATION

• Battery voltage is applied to the diagnosis con-

nector (terminal No. 16).

• The diagnosis connector (terminal No. 4 and No.

5) is grounded to the vehicle body.

COMMENT

• When the communication between M.U.T.-III and

ECM is impossible, it can be suspected that the
CAN bus line, power supply circuit of the diagno-
sis connector, and/or grounding circuit are defec-
tive.

• Communication can not be achieved either, if a

wrong vehicle type is selected on M.U.T.-III.

AK700435

Data link connector

Brakepedal

C-125 (B)

Connector: C-125

AK900599

Connector: C-01

C-01

AK700402AB

ECM

B-11 (GR)

Connector: B-11

AK900598

Connector: C-33

C-33

AK700443AB

ETACS-ECU

C-317

Connectors: C-301, C-309 and C-317

C-301

C-309 (B)

AK900600

Connector: C-04

C-04

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-752

TROUBLESHOOTING HINTS (The most
likely causes for this case:)

• Malfunction of the data link connector.

• Open/short circuit or poor contact in the data link

connector.

• Malfunction of the CAN communication.

• Malfunction of the scan tool.

• Malfunction of the ECM.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

STEP 1. Check the vehicle communication interface (V.C.I.)
MB991824 operations.
(1) Connect the Scan tool to the data link connector.
(2) When the power of V.C.I. is turned to ON, the indicator lamp

of the V.C.I. illuminates in green.

• The indicator lamp of the V.C.I. illuminates in green.

Q: Is the indicator lamp of the V.C.I. illuminates in green?

YES : Go to Step 2.
NO : Use scan tool, perform CAN bus line diagnosis.

STEP 2. Measure the battery positive voltage.
(1) Measure the battery positive voltage during cranking.

• The voltage should be 8 volts or more.

Q: Is the measured voltage 8 volts or more?

YES : Go to Step 3.
NO : Check the battery. Refer to GROUP 54A, Battery

−

On-vehicle Service

− Battery Check

P.54A-7