Mitsubishi Eclipse. Manual — part 504
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-559
DESCRIPTIONS OF MONITOR METHODS
• Crankshaft position sensor signal does not
change.
• Crankshaft position sensor signal is not normal
pattern.
.
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)
• Not applicable
.
DTC SET CONDITIONS <Range/Performance problem-alignment>
Logic Flow Chart
.
Check Conditions
• Engine is being cranked.
Judgment Criteria
• Crankshaft position sensor output voltage has not
changed (no pulse signal is input) for 2 seconds.
.
START
END
YES
NO
NO
YES
MALFUNCTION
GOOD
CONTINUOUS
FAILURE FOR 2secs
EXPECTED STATE
OF THE SENSOR
MONITORING
CONDITIONS?
YES
NO
AK301446
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-560
DTC SET CONDITIONS <Circuit continuity>
Logic Flow Chart
Check Conditions, Judgment Criteria
• Normal signal pattern has not been input for cyl-
inder identification from the crankshaft position
sensor signal and camshaft position sensor sig-
nal for 2 seconds.
.
OBD-ll DRIVE CYCLE PATTERN
Refer to , Diagnostic Function
− OBD-ll Drive Cycle −
Procedure 6
− Other Monitor
.
.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are: )
• Crankshaft position sensor failed.
• Open or shorted crankshaft position sensor cir-
cuit, or harness damage, or connector damage.
• ECM failed. <M/T>
• PCM failed. <A/T>
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (MUT-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991911: Main Harness B
• MD998478: Test Harness (3pin, triangle)
START
MONITORING
CONDITIONS
END
NO
NO
NO
YES
YES
YES
MALFUNCTION
GOOD
OUTPUT SIGNAL
CHANGES
CONTINUOUS
FAILURE FOR 2secs
AK301487
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-561
STEP 1. Using scan tool MB991958, check data list item 22:
Crankshaft Position Sensor.
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
22, Crankshaft Position Sensor.
• The tachometer and engine speed indicated on the scan
tool should much.
(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.
STEP 2. Using the oscilloscope, check the crankshaft
position sensor.
(1) Disconnect the crankshaft position sensor connector, and
connect the test harness special tool (MD998478) in
between.
(2) Connect the oscilloscope probe to crankshaft position
sensor connector terminal No. 2 (bank clip of special tool).
NOTE: Connect the oscilloscope plobe to terminal No. 43
<M/T> or terminal No. 45 <A/T> by backprobing when mea-
suring with the ECM or PCM connector.
(3) Start the engine and run at idle.
(4) Check the waveform.
• The waveform should show a pattern similar to the illus-
tration.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the waveform normal?
YES : Go to Step 3.
NO : Go to Step 5.
AK300810
AB
MB991911
16-PIN
MB991827
MB991824
AK102979AB
MD998478
1 2
3
CRANKSHAFT POSITION
SENSOR CONNECTOR
OSCILLOSCOPE
AKX01559AB
NORMAL WAVEFORM
2 ENGINE REVOLUTIONS
5 V
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L>
13B-562
STEP 3. Check connector B-20 at the crankshaft position
sensor 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 21.
AK300448
1
2
3
CRANKSHAFT
POSITION
SENSOR
CONNECTOR: B-20 <WITHOUT INTAKE
MANIFOLD TUNING SYSTEM>
AB
B-20 (B)
HARNESS CONNECTOR:
COMPONENT SIDE
AK300449
1
2
3
CONNECTOR: B-20 <WITH INTAKE
MANIFOLD TUNING SYSTEM>
AB
B-20 (B)
CRANKSHAFT
POSITION
SENSOR
HARNESS CONNECTOR:
COMPONENT SIDE
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст