Mitsubishi Outlander GS45X. Manual - part 914

 

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Mitsubishi Outlander GS45X. Manual - part 914

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-589

STEP 5. Check harness connector B-122 at power steering 
pressure switch and harness connector B-10 at ECM for 
damage. 
Q: Is the harness connector in good condition? 

YES : Go to Step 6. 
NO :  Repair or replace it. Refer to GROUP 00E, Harness 

Connector Inspection 

P.00E-2

. Then go to Step 9.

STEP 6. Check for harness damage between power 
steering pressure switch connector B-122 and ECM 
connector B-10.
(1) Disconnect the connector B-122 and B-10 measure at the 

harness side.

(2) Measure the resistance between connector B-122 (terminal 

No. 1) and connector B-10 (terminal No. 58).

• Should be less than 2 ohms.

Q: Is the measured resistance less than 2 ohms?

YES : Then go to Step 7.
NO :  Repair it. Then go to Step 9.

STEP 7. Check for short circuit to ground between power 
steering pressure switch connector B-122 and ECM 
connector B-10.
(1) Disconnect the connector B-122 and B-10 measure at the 

harness side.

(2) Check for the continuity between connector B-122 (terminal 

No. 1) and ground.

• Not continuity.

Q: Is the harness wire in good condition?

YES : Then go to Step 8.
NO :  Repair it. Then go to Step 9.

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AK703258

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AB

B-122 harness
connector:
component side 

B-10 harness
connector:
component side 

1

AK703259AB

B-122 harness
connector:
component side 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-590

STEP 8. Replace the power steering pressure switch. 
(1) Replace the power steering pressure switch. 
(2) Check the trouble symptoms. 
(3) Read in the diagnostic trouble code (DTC). 
Q: Is DTC P0551 set?

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

register the ID code. Refer to GROUP 42B, ID Code 
Registration Judgment Table <Vehicles with KOS> 

P.42B-15

 or GROUP 42C, ID Codes Registration 

Judgment Table <Vehicles with WCM> 

P.42C-10

Then go to Step 9.

NO :  Go to Step 9.

STEP 9. Using scan tool MB991958, check data list item 83: 
Power Steering Pressure Switch. 
(1) Start the engine and run at idle. 
(2) 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. 

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

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-591

DTC P0554: Power Steering Pressure Switch Circuit Intermittent

.

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.

• 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".

AK703256

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1

POWER STEERING PRESSURE SWITCH CIRCUIT

POWER STEERING
PRESSURE SWITCH

B-10

B-122

(MU801211)

AB

1

58

OFF

ON

ENGINE
CONTROL
MODULE

LIGHT GREEN

AK900157 AD

B-122 (B)

Connector: B-122

AK700401AB

ECM

B-10 (GR)

Connector: B-10

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-592

• The ECM checks whether the power steering 

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

.

DESCRIPTIONS OF MONITOR METHODS

Power steering pressure switch changes from off to 

on more than 10 times for 1 second.

.

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

.

AK703260

Start

Yes

Yes

Yes

No

No

No

Frequency > 10Hz

Continuous

failure for 20secs

Malfunction

End

Good

Monitoring
conditions

 

 

 

 

 

 

 

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