Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 490
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-252
STEP 10. Check harness for short circuit to ground
between combination meter connector C-43 terminal 9 and
Park/Neutral position switch connector B-41 terminal 4.
Q: Is the harness wire in good condition?
YES : Go to Step 11.
NO : Repair it.
STEP 11. Using scan tool MB991502, check the light bulb.
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) Turn the ignition switch to "ON" position.
•
The "N" range light in the combination meter flushes.
(3) Turn the ignition switch to "LOCK" (OFF) position.
Q: Does the "N" range light flush?
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.
AC001729 AO
CONNECTOR: C-43
AC001844
CONNECTOR: B-41
DIPSTICK
AB
AC001252
MB991502
16 PIN
AB
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-253
SYMPTOM PROCEDURES
INSPECTION PROCEDURE 1: Vehicle does not Move
COMMENT
If the engine does not start when the selector lever is
in "P" or "N" position, the cause is probably a
malfunction of Park/Neutral position switch system,
transaxle control cable assembly, engine system,
torque converter or oil pump.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
•
Malfunction of the Park/Neutral position switch
•
Malfunction of the transaxle control cable
assembly
•
Malfunction of the engine system
•
Malfunction of the torque converter
•
Malfunction of the oil pump
•
Malfunction of the PCM
DIAGNOSIS
REQUIRED SPECIAL TOOL:
MB991502: Scan Tool (MUT-II)
STEP 1. Using scan tool MB991502, read the A/T
diagnostic trouble code.
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) Turn the ignition switch to "ON" position.
(3) Read the A/T diagnostic trouble code.
(4) Turn the ignition switch to "LOCK" (OFF) position.
Q: Is A/T diagnostic trouble code numbers "27" or "28"
displayed?
YES : Refer to
, code number 27, 28:
Park/Neutral Position Switch System.
NO : Go to Step 2.
STEP 2. Check the transaxle control cable assembly.
Move the selector lever to each position, and check if the
manual control lever position of the Park/Neutral position
switch corresponds to the selector lever position.
Q: Is the manual control lever position correct?
YES : Go to Step 3.
NO : Repair the transaxle control cable. Refer to
, Park/Neutral Position Switch and Control Cable
Adjustment. Confirm that the malfunction symptom is
correct.
AC001252
MB991502
16 PIN
AB
AC001856
P
R
N
D
3
2
L
PARK/NEUTRAL
POSITION SWITCH
MANUAL
CONTROL
LEVER
AB
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-254
STEP 3. Check the engine.
Refer to GROUP 13A <2.4L Engine>, Diagnosis
−
Trouble
Symptom Chart
−
Starting
or GROUP 13B <3.0L
Engine>, Diagnosis
−
Trouble Symptom Chart
−
Starting
Q: Is the inspection result good?
YES : Go to Step 4.
NO : Repair or replace the appropriate engine
components.
STEP 4. Check the torque converter.
(1) Remove the transaxle.
(2) Check the torque converter for installation condition
(whether installed in a slanted direction or not), its spline or
its teeth for damage. Refer to GROUP 23B, Transaxle
.
Q: Is the torque converter in good condition?
YES : Go to Step 5.
NO : Repair or replace it.
STEP 5. Replace the oil pump.
Replace the oil pump (Oil pump cannot be repaired). Refer to
GROUP 23B, Transaxle
. Confirm that the malfunction
symptom is eliminated.
Q: Is the symptom eliminated?
YES : Diagnosis is complete.
NO : Go to Step 6.
STEP 6. Replace the PCM.
Q: Is the symptom eliminated?
YES : Diagnosis is complete.
NO : Start over at Step 1.
INSPECTION PROCEDURE 2: Does not Move Forward
COMMENT
If the vehicle does not move forward when the
selector lever is shifted from "N" to "D," "2" or "L"
range while the engine is idling, the cause is
probably abnormal line pressure or a malfunction of
the underdrive clutch or valve body.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
•
Abnormal line pressure
•
Malfunction of the underdrive solenoid valve
•
Malfunction of the underdrive clutch
•
Malfunction of the valve body
•
Malfunction of the PCM
AC001857
AC001858
AUTOMATIC TRANSAXLE DIAGNOSIS
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AUTOMATIC TRANSAXLE
23A-255
DIAGNOSIS
REQUIRED SPECIAL TOOL:
MB991502: Scan Tool (MUT-II)
STEP 1. Using scan tool MB991502, check actuator test
item 02: Underdrive Solenoid Valve.
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) Turn the ignition switch to "ON" position.
(3) Set scan tool MB991502 to actuator test mode for item 02:
Underdrive Solenoid Valve.
•
An operation sound should be heard from solenoid
valve when solenoid valve is operated.
(4) Turn the ignition switch to "LOCK" (OFF) position.
Q: Is the solenoid valve operating properly?
YES : Go to Step 2.
NO : Repair or replace the underdrive solenoid valve.
Refer to GROUP 23B, Valve Body
. Then
confirm that the symptom is eliminated.
STEP 2. Check the hydraulic pressure.
Measure the hydraulic pressure of each element when the
selector lever is at the "L" range, and check if each hydraulic
pressure is within the standard value. Refer to
Hydraulic Pressure Test.
Q: Is the hydraulic pressure within the standard value?
YES : Go to Step 3.
NO : Go to Step 4.
STEP 3. Check the underdrive clutch system.
(1) Remove the valve body cover and valve body. Refer to
, Transaxle Assembly and GROUP 23B,
(2) Blow compressed air into the underdrive clutch oil orifice of
the transaxle case, and check if the underdrive clutch piston
moves and air pressure is maintained in that condition.
Q: Is the air pressure maintained?
YES : Go to Step 4.
NO : Go to Step 5.
AC001252
MB991502
16 PIN
AB
AC001859
UNDERDRIVE
CLUTCH OIL
ORIFICE
AB
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