Mitsubishi Eclipse 1990 Service Manual page 1037

AUTOMATIC TRANSAXLE
(TURBO) AND
Code No. 1 st gear incorrect ratio
[Comment]
If the value resulting from dividing the PG-A output (input shaft rotation speed) by the
ratio does not match the output (output shaft rotation speed) after
diagnostic trouble code No. 51 is output. In addition, if
51, 52, 53 and 54) are output 4 times, there is an incorrect gear ratio, fail-safe code No. 88
is output and the vehicle is locked in
SCAN TOOL DTC
Is diagnostic trouble code No. 31
No
SCAN TOOL DTC
Is diagnostic trouble code No. 32
output?
No
Measure output waveform from pulse generator connector
oscilloscope).
Disconnect the connector and measure at PG-A side.
Engine: 1,000 [approx. 30
Selector lever position: range
Voltage between terminals (1) and (2) (PG-A output waveform)
OK: The waveform shown below should be output, and the amplitude should
be 1.0 or more. (Refer to
There should be no noise in
Voltage between terminals (3) and (4)
OK: Thewaveformshownbelowshould
be 0.5 or more. (Refer to
There should be no noise in the output waveform.
OK
Replace the rear clutch.
2
1
0
- 1
- 2
0 10
ENGINE>
diagnostic trouble codes (Nos.
gear or gear (2, L) as a fail-safe measure.
Yes
Code Nos. 31,
A system check (Refer to
Yes
Code Nos. 32, 82
system check (Refer to
mph)]
gear)
output waveform.
output waveform)
I
20
1621126
TSB Revision
ENGINE
Troubleshooting
Probable
Malfunction of pulse generator A or
gear Malfunction of transfer
gear is engaged,
Refer to Automatic Transaxle Overhaul
Pulse generator
Pulse generator
NG
Pulse generator A and
(using an
Check trouble symptom.
Replace the transfer
end clutch retainer.
Eliminate the source
I
cause
gear
of clutch
Malfunction of rear
w i r e
,
OK
.
NG
gear and
I
noise.
0
10
.