Mitsubishi Outlander GS45X. Manual - part 676

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-527

STEP 12. Using scan tool MB991958, read the diagnostic 
trouble code (DTC).
(1) Connect scan tool MB991958 to the data link connector. 
(2) Start the engine and run at idle.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC P0515 set?

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

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-528

DTC P0551: Power Steering Pressure Switch Circuit Range/Performance

.

CIRCUIT OPERATION

• A battery positive voltage is applied to the power 

steering pressure switch output terminal (terminal 
No. 1) from the ECM (terminal No. 58) via the 
resistor in the ECM.

.

TECHNICAL DESCRIPTION

• The power steering pressure switch converts the 

existence of a power steering load into a high/low 
voltage, and inputs it into the ECM.

AK604252

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2

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1

POWER STEERING PRESSURE SWITCH CIRCUIT

POWER STEERING
PRESSURE SWITCH

B-10

B-122

(MU801211)

AD

1

58

OFF

ON

ENGINE
CONTROL
MODULE

YELLO

W

AK704138

Power steering
pressure switch

AB

Connector: B-122

B-122 (B)

AK704090AB

Connector: B-10

B-10 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-529

• When the steering wheel is turned, hydraulic 

pressure rises. The power steering pressure 
switch closes, and the applied battery positive 
voltage will be grounded. With this, the power 
steering pressure switch output voltage will fluc-
tuate between 0 and 12 volts.

• While driving with the steering wheel held 

straight, the power steering pressure switch turns 
"OFF".

• The ECM checks whether the power steering 

pressure switch turns "OFF" or "ON" during driv-
ing.

.

DESCRIPTIONS OF MONITOR METHODS

Power steering pressure switch stays on during 

specified go/stop operations.

.

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)

• Engine coolant temperature sensor

.

DTC SET CONDITIONS
Logic Flow Chart

Yes

No

No

No

Monitoring

conditions

End

Malfunction

Good

Start

Power steering

switch ON

Yes

Go/stop operation

for specified times

Yes

AK604346

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-530

.

Check Conditions 

• Engine coolant temperature is higher than 20°C 

(68

°F). 

• Drive for 4 seconds or more with the vehicle 

speed is 50 km/h (31 mph) or more. Stop the 
vehicle [vehicle speed is 1.5 km/h (1.0 mph) or 
less]. Repeat 10 times or more. 

Judgement Criterion 

• Power steering pressure switch continues to be 

"ON". 

.

OBD-II DRIVE CYCLE PATTERN

None.

.

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

• Power steering pressure switch failed. 

• Open or shorted power steering pressure switch 

circuit, 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

• MB992110: Power Plant ECU Check Harness

STEP 1. Using scan tool MB991958, check data list item 83: 
Power Steering Pressure Switch. 

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) Start the engine and run at idle. 
(3) Set scan tool MB991958 to the data reading mode for item 

83, Power Steering Pressure Switch. 

• If the steering wheel is not turned while idling, "OFF" will 

be displayed.

• If the steering wheel is turned while idling, "ON" will be 

displayed.

(4) Turn the ignition switch to the "LOCK" (OFF) position. 
Q: Is the switch operating properly?

YES :  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

.

NO :  Go to Step 2.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector