Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 500
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-292
STEP 11. Check harness for short circuit to ground or
open circuit between dual pressure switch connector A-36
terminal 2 and PCM connector C-57 <2.4L Engine> or C-59
<3.0L Engine> terminal 83.
Q: Is the harness wire in good condition?
YES : Go to Step 12.
NO : Repair it.
STEP 12. Check the dual pressure switch.
Refer to GROUP 55A, Dual Pressure Switch Check
.
Q: Is the switch operating properly?
YES : Go to Step 13.
NO : Replace the dual pressure switch. Refer to GROUP
55A, Refrigerant Line
.
AC004374
CONNECTOR: A-36
AB
AC001657
CONNECTOR: C-57 <2.4L ENGINE> OR
C-59 <3.0L ENGINE>
AK
PCM
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-293
STEP 13. Using scan tool MB991502, check data list item
65: Dual Pressure Switch.
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine and run at idle.
(3) Set scan tool MB991502 to data reading mode for item65:
Dual Pressure Switch.
•
When the A/C is in operation, the scan tool display
should be "ON."
•
When the A/C is not in operation, the scan tool display
should be "OFF."
(4) Turn the ignition switch to "LOCK" (OFF) position.
Q: Is the switch operating properly?
YES : This malfunction is intermittent. Refer to GROUP 00,
How to Use Troubleshooting/Inspection Service
Points
−
How to Cope with Intermittent Malfunction
NO : Replace the PCM.
STEP 14. Check connector C-57 <2.4L Engine> or C-59
<3.0L Engine> at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 13.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
.
AC001252AE
16 PIN
MB991502
AC001657
CONNECTOR: C-57 <2.4L ENGINE> OR
C-59 <3.0L ENGINE>
AK
PCM
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-294
INSPECTION PROCEDURE 16: Transaxle won't Downshift under Load with Auto-cruise Engaged.
AC004696
Auto-cruise Signal Line System Circuit
AC
AC001741
CONNECTOR: C-20
AO
AC001657
CONNECTOR: C-57 <2.4L ENGINE> OR
C-59 <3.0L ENGINE>
AK
PCM
AC001741
CONNECTOR: C-28
AM
AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-295
CIRCUIT OPERATION
When the battery positive voltage from PCM
(terminal number 75) is grounded at auto-cruise
control-ECU (terminal number 3), the auto-cruise
control-ECU emits a overdrive cancel signal. When a
malfunction of the auto-cruise control circuit occurs,
the transmission may downshift harshly with the
auto-cruise control engaged.
COMMENT
A malfunction may be present on the auto-cruise
signal line circuit, auto-cruise control ECU or the
PCM.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set:)
•
Damaged harness, connector
•
Malfunction of the PCM
•
Malfunction of the auto-cruise control ECU
DIAGNOSIS
Required Special Tool:
MB991502: Scan Tool (MUT-II)
STEP 1. Using scan tool MB991502, check data list item 66:
Overdrive Off Signal (Auto-cruise ECM Signal).
CAUTION
To prevent damage to scan tool MB991502, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Start the engine. (Operate the auto-cruise)
(3) Set scan tool MB991502 to data reading mode for item 66:
Overdrive Off Signal (Auto-cruise ECM Signal).
•
When driving at level road, the display should be "OFF."
•
When driving at uphill road, the display should be "ON."
(4) Turn the ignition switch to "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : This malfunction can be intermittent. Refer to GROUP
00, How to Use Troubleshooting/Inspection Service
Points
−
How to Cope with Intermittent Malfunction
NO : Go to Step 2.
STEP 2. Check the auto-cruise system.
Check the auto-cruise system. Refer to GROUP 17, Auto-
cruise Control System Diagnostic Troubleshooting Strategy
Q: Is the auto-cruise system operating properly?
YES : Go to Step 3.
NO : Repair it, then check the symptom.
AC001252AE
16 PIN
MB991502
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