Mitsubishi Outlander GS45X. Manual — part 913
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-585
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.
• 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.
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-586
.
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
.
Check Conditions
• Engine coolant temperature is higher than 20°C
(68
°F).
• Repeat 10 times or more: drive*
1
, stop*
2
.
Drive*
1
:
• Vehicle speed is more than 50 km/h (31
mph) lasting 4 seconds or more.
Stop*
2
:
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) <3.0L ENGINE>
13B-587
• Vehicle speed is less than 1.5 km/h (1
mph).
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.
• Connector damage.
• Harness 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
.
NO : Go to Step 2.
AK700568AB
MB991824
MB991827
MB991910
Data link
connector
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-588
STEP 2. Measure the power supply voltage at power
steering pressure switch connector B-122 by backprobing.
(1) Do not disconnect the connector B-122.
(2) Start the engine and run at idle.
(3) Measure the voltage between terminal No. 1 and ground by
backprobing.
• When steering wheel is not turned, voltage should be
battery positive voltage.
• When steering wheel is turned, voltage should be 1 volt
or less.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?
YES : Go to Step 3.
NO : Go to Step 5.
STEP 3. 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 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 9.
STEP 4. 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 : 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
.
NO : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, ID Code
Registration Judgment Table <Vehicles with KOS>
or GROUP 42C, ID Codes Registration
Judgment Table <Vehicles with WCM>
Then go to Step 9.
1
AK703257
B-122 harness
connector:
harness side
AB
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст