Mitsubishi Eclipse 1990 Service Manual page 1050

INSPECTION PROCEDURES 12
Some points (Early, late shifting points)
[Comment]
Some shift points occurs early, late while driving. In such cases, the cause is probably a
defective valve body, or it is a phenomenon related
Does fuzzy shifting occur normally?
Deviations at some shift points occurs only when the ATF is cold
or less].
Deviations at some shift
hot or more].
Valve body disassembly, cleaning and reassembly
Pay particular attention to loosening of bolts, and to damage,
If it is considered that the damage or chipping cannot be
repaired, replace the valve body assembly.
INSPECTION PROCEDURE 13
No fail-safe codes (Does not shift)
[Comment]
Shifting does not occur while driving, and no fail-safe codes are output. In such cases, the
cause is probably a defective overdrive switch or Park/Neutral position switch.
Yes
Check to be sure that backup power is being supplied to
the TCM.
Check to be sure that power is being supplied to the TCM
SCAN TOOL Data list
37 Park/ Neutral position switch
OK: TCM input signal and selector lever position
should match.
I
Code No. 36, 37
(Refer to
Power circuit check
Pay particular attention to open circuits in the harness,
defective connector connections and open circuits in
fuses.
If there is an open circuit in a fuse, the cause of the
should be located and it should be
AUTOMATIC TRANSAXLE
ENGINE (TURBO) AND
control and is not an abnormality.
No
No
No
NG
Park/Neutral position switch system
TSB Revision
ENGINE> Troubleshooting
P r o b a b l e c a u s e
Malfunction of valve body
Refer to Automatic Transaxle Overhaul
No problem because it is a phenomenon that appears due to
factors associated with control.
Yes
Yes
Probable cause
Malfunction of overdrive switch
Malfunction of Park/ Neutral position switch
Malfunction of power supply circuit
Malfunction of TCM
Does overdrive operate?
SCAN TOOL Data list
35 Overdrive switch
OK: When overdrive switch turns from OFF to ON,
scan tool display turns from OFF to ON.
Check the overdrive switch system according to inspection
, procedure
OK
Replace the TCM.
Yes
(Refer to
,