Mitsubishi Outlander GS45X. Manual - part 694

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-599

STEP 4. 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 − Pattern 19 

P.13A-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P1507 set?

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

DTC P1590: TCM to ECM Communication Error in Torque Reduction Request

.

TECHNICAL DESCRIPTIONS OF 
MONITOR METHODS

The ECM checks whether the errors in data commu-
nications sent by the TCM exist or not.

.

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

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-600

DTC SET CONDITIONS
Logic Flow Chart

Check Condition

• Ignition switch is "ON" position.

Judgment Criterion

• ECM detects an error in communication between 

ECM and TCM.

.

OBD-II DRIVE CYCLE PATTERN

None.

.

TROUBLESHOOTING HINTS (The most 
likely causes for this code to be set are:)

• CAN line harness damage or connector damage.

• ECM failed.

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

AK604369

Start

Yes

Yes

Yes

No

No

No

Continuous failure

for specified time

Malfunction

End

Good

Monitoring
conditions

Communication status

fails

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-601

STEP 1. Using scan tool MB991958, diagnose CAN bus 
line.

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) Diagnose CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line normal?

YES : Go to Step 2 . 
NO :  Repair the CAN bus line. Refer to GROUP 54C, 

Diagnosis 

− Can Bus Diagnostics Table 

P.54C-17

.

STEP 2. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).
(1) Turn the ignition switch to the "ON" position.
(2) Read the DTC.
(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P1590 set?

YES : Replace the ECM. When the ECM is replaced, 

register the ID code. Refer to GROUP 42B, Diagnosis 
− ID Code Registration Judgment Table <Vehicles 

with KOS> 

P.42B-15

 or GROUP 42C, Diagnosis 

− ID 

Codes Registration Judgment Table <Vehicles with 
WCM> 

P.42C-10

.

NO :  It can be assumed that this malfunction is intermittent. 

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

− How to 

Cope with Intermittent Malfunctions 

P.00-15

.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-602

DTC P1603: Battery Backup Line Malfunction

.

TECHNICAL DESCRIPTION

• The ECM checks the open circuit of battery 

backup line.

NOTE: When the system detects an open circuit in 
the battery backup line, it makes 1 failure judgment 
of other diagnostic trouble codes (DTCs).

.

DESCRIPTIONS OF MONITOR METHODS

Battery backup line voltage is under specified value.

AK604256

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

104

2

7.5A

AC

WHITE

WHITE

RED-BLA

CK

B-11

36

FUSIBLE LINK

BATTERY BACKUP CIRCUIT

RELAY BOX
(ENGINE COMPARTMENT)

ENGINE
CONTROL
MODULE

BATTERY
BACKUP

AK704097AB

Connector: B-11

B-11 (GR)