Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 454
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-107
STEP 7. Check harness for short circuit to ground between
PCM connector C-61 <2.4L Engine> or C-63 <3.0L Engine>
terminal 103 and input shaft speed sensor connector B-42
terminal 2.
Q: Is the harness wire in good condition?
YES : Go to Step 4.
NO : Repair it.
AC001657
CONNECTOR: C-61 <2.4L ENGINE> OR
C-63 <3.0L ENGINE>
PCM
AN
AC001835
CONNECTOR: B-42
AD
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-108
STEP 8. Using the oscilloscope, check the waveform at
PCM connectors C-54 <2.4L Engine> or C-55 <3.0L
Engine> and C-61 <2.4L Engine> or C-63 <3.0L Engine> by
backprobing.
(1) Do not disconnect connectors C-54 <2.4L Engine> or C-55
<3.0L Engine> and C-61 <2.4L Engine> or C-63 <3.0L
Engine>.
(2) Connect an oscilloscope probe to PCM connector C-54
<2.4L Engine> or C-55 <3.0L Engine> terminal 57 and to
PCM connector C-61 <2.4L Engine> or C-63 <3.0L Engine>
terminal 103 by backprobing.
(3) Start the engine and run at constant speed of 50km/h
(31mph). (Gear range: 3rd gear)
(4) Check the waveform.
•
The waveform should show a pattern similar to the
illustration. The maximum value should be 4.8 volts and
more and the minimum value 0.8 volts and less. The
output waveform should not contain the noise.
(5) Turn the ignition switch to "LOCK" (OFF) position.
Q: Is the waveform normal?
YES : Go to Step 9.
NO : Go to Step 10.
STEP 9. Check connectors C-54 <2.4L Engine> or C-55
<3.0L Engine> and C-61 <2.4L Engine> or C-63 <3.0L
Engine> at PCM for damage.
Q: Are the connectors in good condition?
YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
.
AC001657
CONNECTORS: C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>, C-61 <2.4L ENGINE>
OR C-63 <3.0L ENGINE>
PCM
AM
C-54 <2.4L ENGINE>
OR
C-55 <3.0L ENGINE>
C-61 <2.4L ENGINE>
OR
C-63 <3.0L ENGINE>
AC001899
C-61 <2.4L ENGINE> OR C-63 <3.0L ENGINE>
CONNECTOR HARNESS SIDE VIEW
C-54 <2.4L ENGINE> OR C-55 <3.0L ENGINE>
CONNECTOR HARNESS SIDE VIEW
AD
OSCILLO-
SCOPE
PROBE
ACX02131
NORMAL WAVEFORM
AB
(V)
5
0
AC001657
CONNECTORS: C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>, C-61 <2.4L ENGINE>
OR C-63 <3.0L ENGINE>
PCM
AM
C-54 <2.4L ENGINE>
OR
C-55 <3.0L ENGINE>
C-61 <2.4L ENGINE>
OR
C-63 <3.0L ENGINE>
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-109
STEP 10. Check connectors C-54 <2.4L Engine> or C-55
<3.0L Engine> and C-61 <2.4L Engine> or C-63 <3.0L
Engine> at PCM and B-42 at input shaft speed sensor for
damage.
Q: Are the connectors in good condition?
YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
.
STEP 11. Check the continuity at input shaft speed sensor
connector B-42.
(1) Disconnect connector B-42 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 12.
NO : Repair it because of harness open circuit or damage
between input shaft speed sensor connector B-42
terminal 1 and PCM connector C-54 <2.4L Engine> or
C-55 <3.0L Engine> terminal 57.
AC001657
CONNECTORS: C-54 <2.4L ENGINE> OR
C-55 <3.0L ENGINE>, C-61 <2.4L ENGINE>
OR C-63 <3.0L ENGINE>
PCM
AM
C-54 <2.4L ENGINE>
OR
C-55 <3.0L ENGINE>
C-61 <2.4L ENGINE>
OR
C-63 <3.0L ENGINE>
AC001835
CONNECTOR: B-42
AD
AC001835
CONNECTOR: B-42
AD
ACX02128
HARNESS
CONNECTOR: B-42
AE
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-110
STEP 12. Check the sensor output voltage at input shaft
speed sensor connector B-42.
(1) Disconnect connector B-42 and measure at the harness
side.
(2) Turn the ignition switch to "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 "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 13.
NO : Repair it because of harness open circuit or damage
between input shaft speed sensor connector B-42
terminal 2 and PCM connector C-61 <2.4L Engine> or
C-63 <3.0L Engine> terminal 103.
STEP 13. Check the power supply voltage at input shaft
speed sensor connector B-42.
(1) Disconnect connector B-42 and measure at the harness
side.
(2) Turn the ignition switch to "ON" position.
(3) Measure the voltage between terminal 3 and ground.
•
Voltage should be battery positive voltage.
(4) Turn the ignition switch to "LOCK" (OFF) position.
Q: Is the voltage normal?
YES : Go to Step 15.
NO : Go to Step 14.
AC001835
CONNECTOR: B-42
AD
ACX02127
HARNESS
CONNECTOR: B-42
AE
AC001835
CONNECTOR: B-42
AD
ACX02126
HARNESS
CONNECTOR: B-42
AE
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