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.

1

AK703258

16 15 14 13 12 11 10 9 8 7 6 5 4 3

2

1

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

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

1

2

3 4 5 6 7 8 9 10 11 12 13 14 15 16

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

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