Mitsubishi Eclipse. Manual - part 571

 

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Mitsubishi Eclipse. Manual - part 571

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-827

STEP 13. Check for harness damage between power 
steering pressure switch connector B-19 (terminal No. 1) 
and ECM connector C-58 (terminal No. 54) <M/T> or PCM 
connector C-55 (terminal No. 52) <A/T>.

AK300437

1

CONNECTOR: B-19

AB

B-19

HARNESS CONNECTOR:
COMPONENT SIDE

AK300462

42

43

48

49

50

51

52

53

54

55

56

57

46 45 44

58

59

60

61

62

63

64

65

66

47

41

CONNECTOR: C-55 <A/T>

C-55 (GR)

AB

HARNESS CONNECTOR:
COMPONENT SIDE

AK300748

65

43
50

42
49

41
48
60

61

64

46

47

58

59

67

68

45

56
66

52 51

44

53

62

54

63

57

55

CONNECTOR: C-58 <M/T>

AB

C-58 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-828

NOTE: Check harness after checking intermediate connector 
B-47. If intermediate connector is damaged, repair or replace 
them. Refer to GROUP 00E, Harness Connector Inspection 

P.00E-2

. Then go to Step 14.

Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 14.
NO :  Repair it. Then go to Step 14.

STEP 14. Using scan tool MB991958, check data list item 
27: 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 

27, Power Steering Pressure Switch.

• If the steering wheel is stopped while idling, "OFF" will 

be displayed.

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

displayed.

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

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

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-829

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 
1) from the ECM (terminal 54) or PCM (terminal 
52) <A/T> via the resistor in the ECM <M/T> or 
PCM <A/T>.

.

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 <M/T> or PCM 
<A/T>.

AK000708

1

YELL

OW

1

YELL

OW

ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>

POWER STEERING
PRESSURE SWITCH

B-19

1

54 <M/T>
52 <A/T>

     B-47
MU802653

1

65

43
50

42
49

41

48
60 61

64

46 47
58 59
67 68

45

56
66

52

51

44

53

62

54

63

57

55

C-58 <M/T>
(MU803782)

C-55 <A/T>
(MU803781)

42 43
48 49 50 51 52 53 54 55 56 57

46

45

44

58 59

60 61 62 63

64 65 66

47

41

Power Steering Pressure Switch Circuit

AK300083

CONNECTOR: B-19

POWER
STEERING
PRESSURE
SWITCH

POWER STEERING
OIL PUMP

AB

B-19

AK300244

CONNECTOR: C-55 <A/T>

AG

PCM

C-55 (GR)

AK300091

CONNECTOR: C-58 <M/T>

ECM

AC

C-58 (GR)

AK300087

CONNECTOR: B-47

AB

B-47 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-830

• 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 12 volts and 0 volt.

• While driving with the steering wheel held 

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

• The ECM <M/T> or PCM <A/T> checks whether 

the power steering pressure switch turns "OFF" 
or "ON" during driving.

.

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

.

LOGIC FLOW CHART

.

DTC SET CONDITIONS

Check Conditions

• Engine coolant temperature is higher than 30°C 

(86

°F).

• Vehicle speed is higher than 50 km/h (31 mph).

Judgment Criteria

• The ON/OFF frequency of a power steering pres-

sure switch is 10 Hz or more for 20 seconds.

.

OBD-ll DRIVE CYCLE PATTERN
None.

.

START

END

NO

NO

YES

YES

YES

NO

MALFUNCTION

GOOD

CONTINUOUS FAILURE 

FOR 20secs

FREQUENCY > 10Hz

MONITORING

CONDITIONS

AK301790

 

 

 

 

 

 

 

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