Mitsubishi Outlander GS45X. Manual - part 916

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-597

STEP 1. 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) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0602 set?

YES : Replace the ECM with one into which vehicle 

information is correctly entered.

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

.

DTC P0604: Internal Control Module Random Access Memory (RAM) Error

.

TECHNICAL DESCRIPTION

Monitors the computation function of the engine con-
trol module periodically.

.

DTC SET CONDITIONS

Check Condition

• Ignition switch is "ON" position.

Judgment Criterion

• All RAM data of ECM are defect.

or

• RAM data (engine) is defect.

.

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

• 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

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-598

STEP 1. 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) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0604 set?

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

register the ID code. Refer to GROUP 42B, Diagnosis 
− ID Codes 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

.

DTC P0606: Engine Control Module Main Processor Malfunction

.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

AK700399AB

MFI relay

A-33X

Connector: A-33X

AK700402AB

ECM

B-11 (GR)

Connector: B-11

AK900282 AB

ETACS-ECU

Connector: C-304

C-304

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-599

ENGINE CONTROL MODULE MAIN 
PROCESSOR MALFUNCTION CIRCUIT

• Refer to Inspection Procedure 21 − Power Supply 

System and Ignition Switch-IG System 

P.13B-804

.

.

CIRCUIT OPERATION

• Refer to Inspection Procedure 21 − Power Supply 

System and Ignition Switch-IG System 

P.13B-804

.

.

TECHNICAL DESCRIPTION

• Throttle actuator control processor checks the 

ECM for abnormal conditions.

.

DESCRIPTIONS OF MONITOR METHODS

No watch dog pulse is detected.

.

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

.

DTC SET CONDITIONS

Check Condition

• Ignition switch is "ON" position.

Judgement Criterion

• No surveillance pulse signals is inputted for 0.5 

second.

.

OBD-II DRIVE CYCLE PATTERN

None.

.

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

• MFI relay failed.

• Shorted MFI relay circuit or connector damage.

• Open or shorted ignition switch-IG circuit, har-

ness damage or connector damage.

• ECM failed. 

DIAGNOSIS

Required Special Tool:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Check the battery.
Refer to GROUP 54A, Battery 

− On-vehicle Service − Battery 

Test 

P.54A-9

.

Q: Are there any abnormalities?

YES : Replace the battery. Then go to Step 8.
NO :  Go to Step 2.

STEP 2. Check harness connector A-33X at MFI relay, 
harness connector B-11 at ECM and harness connector 
C-304 at ETACS-ECU for damage.
Q: Are the harness connectors in good condition?

YES : Go to Step 3.
NO :  Repair or replace them. Refer to GROUP 00E, 

Harness Connector Inspection 

P.00E-2

. Then go to 

Step 8.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-600

STEP 3. Measure the ignition switch-IG signal voltage at 
ECM harness side connector B-11.
(1) Disconnect the connector B-11 and measure at the harness 

side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 92 and ground.

• Voltage should be battery positive voltage.

(4)  Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts) 

present?
YES : Go to Step 4.
NO :  Repair harness wire between ETACS-ECU connector 

C-304 (terminal No. 10) and ECM connector B-11 
(terminal No. 92) because of open circuit or short 
circuit to ground. Then go to Step 8.

STEP 4. Check for harness damage between ETACS-ECU 
connector C-304 (terminal No. 10) and ECM connector B-11 
(terminal No. 92).
Q: Is the harness wire in good condition?

YES : Go to Step 5.
NO :  Repair it. Then go to Step 8.

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AK700211AB

B-11 harness
connector:
component side