1990 MITSUBISHI SPYDER check engine

AUTOMATIC TRANSAXLE ENGINE
(TURBO) AND
ENGINE>
[Comment]l Malfunction of stop light switch
If the stop light switch is ON far 15 minutes or mo re while driving at 3 km/h (2 more, l of connectorthere is a short circuit in the stop light switch a nd diagnostic trouble code No. 28 is output.
l of
SCAN TOOL DTCYes
Is TCL diagnostic trouble code No. 23 Stop light switch check (Refer toGROUP Brake Pedal.)
No NG
Repairl
OK
NG Repair
and stoplight switch.
OK
Check trouble
NG
Replace the TCM.

AUTOMATIC TRANSAXLE ENGINE
(TURBO) AND
ENGINE> Troubleshooting
Code No. Pulse generator A system
[Comment]l Malfunction of pulse generator A If there is no pulse generator A output at an outpu t shaft speed of 1,500 or above, therelMalfunction of connectoris an open circuit in pulse generator A and diagnos tic trouble code No. 31 is output. In addition,lMalfunction of end clutch if diagnosis code No. 31 is output 4. times within 10 seconds, there is an open circuit in pulselMalfunction of TCM
generator A, fail-safe code No. 81 is output and th e vehicle is locked in gear (D) or l Noise generated
gear (2, L) as a fail-safe measure.
Refer to Automatic
P u l s e g e n e r a t o r - (Refer to Replace
OK
Measure output from pulse
generator connector A-l 04 (using an
oscilloscope).l sure at PG-A side.
l Engine: 1,000 [approx. 30 19 mph)]l range
lVoltage between terminals (1) and
OK: The waveform shown belowshould be output, and the am-plitude should be 1.0 or
more. (Refer to
There should be no noise in
the output waveform.
I
NGNG R e p a i rtion
Check trouble
Replace the end clutch retainer I
Eliminate the source of noise.OK
Repair
OK
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Check trouble svmotom.
NG
harness between pulse NG Repair
erator A and TCM connectors.
OK
Replace the TCM.
2
1
0
- 1
- 2 0
1020

AUTOMATIC TRANSAXLE ENGINE
(TURBO) AND ENGINE>
Code No. Pulse generator systemProbable cause
[Comment]l Malfunction of pulse generator If pulse generator output and the input shaft speed is 1,500 or above, there is an l
Malfunction of connector
open circuit in pulse generator and diagnostic trouble code No. 32 is output. In a ddition,
l Malfunction of transfer gearif diagnosis code No. 32 is output 4 times, there i s an open circuit in pulse generator fail-safel of, TCMcode No. 82 is output and the vehicle is locked in gear (D) or gear (2, L) as a fail-safelNoise generatedmeasure.
Refer to Automatic Transaxle Overhaul
Pulse generator
check
(Refer to NG Replace
OK
Measure output waveform from pulse
generator connector (using anoscilloscope).l connector and mea-sure at side.
l Engine: 1,000 [approx. 30 mph)]l Drange
lVoltage between terminals (3) and(4)OK: The waveform shown belowshould be output, and the am-plitude should be 0.5 or
more. (Refer to
There should be no noise in the output waveform.
OK
Repair
OK
Replace pulse with a newcomponent.
Check trouble
Replace the transfer driven gear
Check trouble symptom.
NG
Eliminate the source of noise.
Repair
OK
Check trouble symptom.
NG
NG between pulse Repair
aenerator and TCM connectors.
OK
Replace the TCM.
I -
I
1 6 2 1 1 2 7
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AUTOMATIC TRANSAXLE ENGINE
(TURBO) AND
ENGINE>
Code No. Park/neutral position switch systemProbable cause
[Comment]l Malfunction of park/neutral When the park/neutral position switch signal is inp ut to two or more places simultaneously l
for a continuous of 30 seconds or more, it is judged that there is a short-circuit in theMalfunction of connectorlpark/neutral position switch and diagnostic trouble
code No. 36 is output.Malfunction of ignition switch
When the position switch signal is not input to a single pl ace for a continuousl
Malfunction of TCM
period of 30 seconds or more, it is judged that the re is an open circuit in the park/neutral
position switch and diagnostic trouble code No. 37 is output.
(Refer to
between terminals (3) and
Check the following connector:
NG
.
Check the harness wire between the
switch connectors.
OK
Ignition switch check(Refer to GROUP Ignition Switch.)
Repair
OK
park/neutral position switch and TCM
Replace the TCM.
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AUTOMATIC TRANSAXLE ENGINE
(TURBO) AND
ENGINE> Troubleshootina
Code No. Shift control solenoid valve A (SCSV-A)
system Probable
[Comment]lMalfunction of shift control valve
A
If the resistance value of shift control solenoid v alve A is high, there is an open circuit in shiftlMalfunction of connector
control solenoid valve A and diagnostic trouble cod e No. 41 is output. If the resistance valuelMalfunction of TCM
is low, there is a short circuit in shift control s olenoid valve A and diagnostic trouble Code
No. 42 is output. In addition, if diagnostic troubl e code No. 41 or 42 is output 4 times, there
is an open or short circuit in shift control soleno id valve A, fail-safe code No. 63 is output
and the vehicle is locked in
gear (D) as a fail-safe measure.
NG Replace
check (Refer to
OK
Check the following connectors:NG Repair
l
NG Repair of TCM and SCSV- A.
OK
Replace shift control solenoid valve A(SCSV-A).Check trouble symptom.
NG
Replace the TCM.
Code No. 84 Shift control solenoid valve (SCSV-B) Probable cause
system
[Comment]l Malfunction of shift control solenoid valve If the resistance value of shift control solenoid v alve is high, there is an open circuit in shiftlMalfunction of connector
control solenoid valve and diagnostic trouble code No. 43 is output. If t he resistance valuelMalfunction of TCM
is low, there is a short circuit in shift control s olenoid valve and diagnostic trouble code
No. 44 is output. In addition, if diagnostic trouble code No. 43 or 4 4 is output 4 times, there
is an open or short circuit in shift control soleno id valve
fail-safe code No. 64 is output
and the vehicle is locked in gear (D) as a fail-safe measure.
Check the following connectors: .
OK
Check the harness wireNG Repair of TCM and SCSV-B.
OK
Replace shift solenoid valve (SCSV-B).Check trouble symptom.
NG
Replace the TCM.
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AUTOMATIC TRANSAXLE ENGINE
(TURBO) AND
ENGINE> Troubleshootina
Code No. Pressure control solenoid valve (PCSV)
system
[Comment]If the resistance value of the pressure control sol enoid valve is high, there is an open circuit
in the pressure control solenoid valve and diagnost ic trouble code No. 45 is output. If the
resistance value is low, there is a short circuit in the pressure control solenoid valve and diagnosti ctrouble code No. 46 is output. In addition, if diagnostic trouble code No. 45 or 46 is output
4 times, there is an open or short circuit in the p ressure control solenoid valve, fail-safe code
No. 85 is output and the vehicle is locked in
gear (D) or gear (2, L) as a fail-safemeasure.
Probable cause
l Malfunction of control solenoid valve
l Malfunction of connector
l Malfunction of TCM
check (Refer to
NG Replace
OK
Check the following connectors: .
OK
N G Repair
Check the harness wire between con- NG
of TCM and PCSV.I
OK
Replace the pressure control solenoid
valve (PCSV) with a new component. Check trouble symptom.NG
Replace the TCM.
Code No. Torque converter clutch solenoid
system
[Comment]
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If the resistance value of the torque converter clu
tch solenoid is high, there is an open circuit
in the torque converter clutch solenoid and diagnos tic trouble code No. 47 is output. If the
resistance value is low, there is a short circuit i n the torque converter clutch solenoid and
diagnostic trouble code No. 48 is output. In additi on, if torque converter clutch solenoid
duty continues at 100% for 4 seconds or more, there is an abnormality in the torque converter
clutch control system and diagnostic trouble code N o. 49 is output. If the calculated slippage
amount (the result when the input shaft speed is su btracted from the engine speed) is 5
for ten seconds when the throttle position is 1.5 or higher and the output shaft speed is1,000 in the direct-coupled non-operating range, even th ough the torque converter clutchsolenoid is off, the torque converter clutch is stuck on and diagnostic trouble code No. 58
is output.
Torque converter clutch solenoid check
Check the following connectors: Repair
.
OK
NGCheck the harness wi of TCM and TCC solenoid Repair Probable cake
lMalfunction of torque converter clutch solenoidl
Malfunction of connector
l Malfunction of TCM
Replace(TCC) solenoid with a new component.Engine Stalling during shifting check

AUTOMATIC TRANSAXLE ENGINE
(TURBO) AND
ENGINE> Troubleshooting.
Code No. 1 st gear incorrect ratioProbable cause
[Comment]lIf the value resulting from dividing the PG-A outpu t (input shaft rotation speed) by the gearMalfunction of pulse generator A or lratio does not match the output (output shaft rotation speed) after gear is engaged,Malfunction of transfer gear
l of clutch diagnostic trouble code No. 51 is output. In additi on, if diagnostic trouble codes (Nos. l Malfunction of rear 51, 52, 53 and 54) are output 4 times, there is an incorrect gear ratio, fail-safe code No. 88 l
is output and the vehicle is locked in gear or gear (2, L) as a fail-safe measure.
Refer to Automatic Transaxle Overhaul
Yes
SCAN TOOL DTC
Is
diagnostic trouble code No. 31 Code Nos. 31, Pulse generator
A system check (Refer to
No
SCAN TOOL DTCYes Code Nos. 32, 82 Pulse generator
Is diagnostic trouble code No. 32 system check (Refer to output?
No
NG Pulse generator A and w i r e
OK ,
Measure output waveform from pulse generator connec
tor
(using anoscilloscope).l Disconnect the connector and measure at PG-A side.
l Engine: 1,000 [approx. 30 mph)]
l Selector lever position: range gear)
l Voltage between terminals (1) and (2) (PG-A output waveform)
OK: The waveform shown below should be output, and t he amplitude shouldbe 1.0 or more. (Refer to There should be no noise in output waveform.
l Voltage between terminals (3) and (4) output waveform)
OK: Thewaveformshownbelowshould
be 0.5 or more. (Refer to There should be no noise in the output waveform.
OK
.Check trouble symptom.
NG
Replace the transfer gear and
end clutch retainer.
I
Replace the rear clutch. I
2
1
0
- 1
- 2 0 10 20
1621126
Eliminate the source noise.
010
TSB RevisionI

AUTOMATIC TRANSAXLE ENGINE
(TURBO) AND
ENGINE> Troubleshooting
Code No. gear incorrect ratio c a u s e,
[Comment]lIf the value resulting from dividing the PG-A outpu t (input shaft rotation speed) by the lMalfunction of pulse generator A or gear ratio does not match the output (output shaft rotation speed) gear is engaged,Malfunction of transfer driven gearlMalfunction of end clutch retainer
diagnostic trouble code No. 52 is output. In additi on, if diagnostic trouble codes (Nos. lMalfunction of rear clutch51, 52, 53 and 54) are output 4 times, there is an
incorrect gear ratio, fail-safe code No. 86 lis output and the vehicle is locked in gear (D) or gear (2, L) as a fail-safe measure.lMalfunction of brake’
Refer to Automatic Overhaul
SCAN TOOL DTC
Yes
Is diagnostic trouble code No. 51Code Nos. 86 1 gear incorrectratio check (Refer to
No
Replace the brake.
Code No. gear incorrect ratio
[Comment]If the value resulting from dividing the PG-A outpu t (input shaft rotation speed) by the gear ratio does not match the shaft rotation after is
engaged, diagnostic trouble code No. output. In addition, if related codes (Nos. 51, 52, 53 and 54) are output 4 times, there is an incorrect gear ratio, fail-safe
code No. 86 is output and the vehicle is locked in gear (D) or gear (2, L) as a fail-safemeasure.
SCAN TOOL DTCYesCode Nos. 1 gear incorrectIs diagnostic trouble code No. 51 ratio check (Refer to output?
No
P r o b a b l e c a u s e
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Malfunction of pulse generator A or Malfunction of transfer Malfunction of end clutch retainer
Refer to Automatic
Code No. gear incorrect ratio Probable cause
[Comment]l Malfunction of pulse generator If the value resulting from dividing the PG-A outpu t (input shaft rotation speed) by the lMalfunction of connectorgear ratio does not match the output (output shaft rotation speed) after gear is engaged,lMalfunction of transfer driven gear
diagnostic trouble code No. 54 is output. In additi on, if related diagnostic trouble codes (Nos.
l Malfunction of end clutch retainer
51, 52, 53 and 54) are output 4 times, there is an incorrect ratio, fail-safe code No. 86 is .Malfunction of rear clutch
output and the vehicle is locked in
gear (D) or gear (2, L) as a fail-safe measure. . generated
l Malfunction of
brake
l Malfunction of end clutch
Replace the front clutch. I
Refer to Automatic Overhaul
Is
diagnostic trouble code No. 52 Code nos. gear incorrect
ratio check (Refer to
I Replace the end clutch. I