Mitsubishi Montero Sport (2004+). Manual — part 313
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-665
.
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.
• PCM failed.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I
• MB991827: USB Cable
• MB991911: Main Harness B
STEP 1. 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 sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
NO : Go to Step 2.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-666
STEP 2. Measure the power supply voltage at power
steering pressure switch connector A-76 by backprobing.
(1) Do not disconnect the connector A-76.
(2) Start the engine and run at idle.
(3) Measure the voltage between terminal No.1 and ground by
backprobing.
• When steering wheel is stationary, voltage should mea-
sure battery positive voltage.
• When steering wheel is turned, voltage should measure
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 connector A-76 at power steering pressure
switch for damage.
Q: Is the 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 14.
AK200031
1
AB
CONNECTOR: A-76
A-76
HARNESS CONNECTOR:
COMPONENT SIDE
AK000259AI
1
A-76 HARNESS
CONNECTOR:
HARNESS SIDE
AK200031
1
AB
CONNECTOR: A-76
A-76
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-667
STEP 4. 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 sensor operating properly?
YES : It can be assumed that this malfunction is intermittent.
Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points
NO : Replace the PCM. Then go to Step 14.
STEP 5. Check connector A-76 at power steering pressure
switch for damage.
Q: Is the connector in good condition?
YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 14.
AK303629AB
MB991911
MB991827
MB991824
16-PIN
AK200031
1
AB
CONNECTOR: A-76
A-76
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-668
STEP 6. Measure the power supply voltage at power
steering pressure switch harness side connector A-76.
(1) Disconnect the connector A-76 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 1 and ground.
• Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 11.
NO : Go to Step 7.
STEP 7. Measure the power supply voltage at PCM
connector C-90 by backprobing.
(1) Do not disconnect the PCM connector C-90.
(2) Disconnect the power steering pressure switch connector
A-76.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between terminal No. 52 and ground
by backprobing.
• Voltage should be between battery positive voltage.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is battery positive voltage (approximately 12 volts)
present?
YES : Go to Step 8.
NO : Go to Step 9.
AK200031
1
AB
CONNECTOR: A-76
A-76
HARNESS CONNECTOR:
COMPONENT SIDE
AK000260AK
1
A-76 HARNESS
CONNECTOR:
COMPONENT SIDE
AK103762
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
AB
CONNECTOR: C-90
C-90(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
AKX01552
41
AG
C-90 HARNESS CONNECTOR:
HARNESS SIDE
42 43
44 45 46
47 48 49 50 51 52 53 54 55 56 57
58 59
60 61
63
64
66
65
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст