Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 263
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-251
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 20.
STEP 4. Using scan tool MB991502, check data list item 22:
Crankshaft Position Sensor.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 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 : Replace the ECM or PCM. Then go to Step 20.
STEP 5. Check connector B-20 at the crankshaft position
sensor 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 20.
AK000216AB
AK000216
CONNECTOR : B-20
AKX01177
16 PIN
MB991502
AB
AK000216AB
AK000216
CONNECTOR : B-20
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-252
STEP 6. Check the sensor supply voltage at crankshaft
position sensor harness side connector B-20.
(1) Disconnect the connector B-20 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground.
•
Voltage should be between 4.8 and 5.2 volts
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 11.
NO : Go to Step 7.
STEP 7. Check the sensor supply voltage at ECM
connector C-58 <M/T> or PCM connector C-55 <A/T> by
backprobing
(1) Do not disconnect the ECM connector C-58 <M/T> or PCM
connector C-55 <A/T>.
(2) Disconnect the crankshaft position sensor connector B-20.
(3) Turn the ignition switch to the "ON" position.
(4) Measure the voltage between terminal 43 <M/T> or 45 <A/
T> and ground by backprobing.
•
Voltage should be between 4.8 and 5.2 volts.
(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 8.
NO : Go to Step 9.
STEP 8. Check connector C-58 at ECM <M/T> or connector
C-55 at PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Repair it because of open circuit between crankshaft
position sensor connector B-20 terminal 2 and ECM
connector C-58 terminal 43 <M/T> or PCM connector
C-55 terminal 45 <A/T>. Then go to Step 20.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection (
). Then go to Step 20.
AKX01416 AC
2 1
3
B-20 HARNESS
SIDE CONNECTOR
AK000248
41 42 43 44
48
50 51
49
52 53 54 55 56 57 58 59
45 46 47
60 61
62 63 64
65
67 68
66
AK000248AC
<M/T>
C-58 CONNECTOR
HARNESS SIDE VIEW
AKX01544
AKX01544
41
AE
<A/T>
C-55 CONNECTOR
HARNESS SIDE VIEW
42 43
44 45 46
47 48 49 50 51 52 53 54 55 56 57
58 59
60 61 62 63
64 65 66
AK000225
CONNECTOR : C-58<M/T>, C-55<A/T>
C-55
C-58
PCM<A/T>
ECM<M/T>
AI
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-253
STEP 9. Check connector C-58 at ECM <M/T> or connector
C-55 at PCM <A/T> for damage.
Q: Is the connector in good condition?
YES : Go to Step 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection (
). Then go to Step 20.
STEP 10. Check for short circuit to ground between
crankshaft position sensor connector B-20 terminal 2 and
ECM connector C-58 terminal 43 <M/T> or PCM connector
C-55 terminal 45 <A/T>.
Q: Is the harness wire in good condition?
YES : Replace the ECM or PCM. Then go to Step 20.
NO : Repair it. Then go to Step 20.
AK000225
CONNECTOR : C-58<M/T>, C-55<A/T>
C-55
C-58
PCM<A/T>
ECM<M/T>
AI
AK000216AB
AK000216
CONNECTOR : B-20
AK000225
CONNECTOR : C-58<M/T>, C-55<A/T>
C-55
C-58
PCM<A/T>
ECM<M/T>
AI
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-254
STEP 11. Check the power supply voltage at crankshaft
position sensor harness side connector B-20.
(1) Disconnect the connector B-20 and measure at the harness
side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 3 and ground.
•
Voltage should be battery positive voltage.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 13.
NO : Go to Step 12.
STEP 12. Check connector A-21X at MFI relay for damage.
Q: Is the connector in good condition?
YES : Repair harness wire between MFI relay connector A-
21X terminal 1 and crankshaft position sensor
connector B-20 terminal 3 because of open circuit or
short circuit to ground. Then go to Step 20.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection (
). Then go to Step 20.
STEP 13. Check the continuity at crankshaft position
sensor harness side connector B-20.
(1) Disconnect the connector B-20 and measure at the harness
side.
(2) Check for the continuity between terminal 1 and ground.
•
Should be less than 2 ohm.
Q: Is the continuity normal?
YES : Go to Step 14.
NO : Repair harness wire between crankshaft position
sensor connector B-20 terminal 1 and ground
because of open circuit or harness damage. Then go
to Step 20.
AKX01417AC
2 1
3
B-20 HARNESS
SIDE CONNECTOR
AK000226
AK000226AB
CONNECTOR : A-21X
MFI RELAY
AKX01418 AC
2 1
3
B-20 HARNESS
SIDE CONNECTOR
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