check engine MITSUBISHI SPYDER 1990 Service Repair Manual

AUTOMATIC TRANSAXLE
ENGINE (NON-TURBO)> Troubleshooting
Data Check item
62Speed/ratio error 15 second counter
‘Display
Counts
63Engine model identification
64General flag
E n g i n e M o d e l
S t a t u s
65Actuator test statusIStatusI
66Element mask register StatusI
67
EEPROM flag register
68Output teeth count StatusTeeth
69Wheel speed coefficient in EEPROM
Coefficient
Current production MY/application MY Model Year
ACTUATOR R
E FER E N CE TA BL E
Item No.
Check item Drive contents Check conditions Remarks
01 solenoid
022-4 solenoid
03UD solenoid
04OD solenoid Current flows to the solenoid
Engine:Check the actuator
for 6 seconds at 50% duty. Idle (Vehicle stopped)test status (Display)
Selector lever position:
range
Throttle opening angle: Fully closed

AUTOMATIC TRANSAXLE
ENGINE (NON-TURBO)> Troubleshooting
FAIL-SAFE FUNCTION
If a problem which interferes with the continuous safe operation of the transaxle is identified, the TCM
records a diagnostic trouble code in memory, all so lenoids are turned off, and the module is switched
to limp-in mode.
When limp-in mode is started, the transaxle is locked in gear if a drive gear had previously been
selected. Meanwhile, if
or range was selected, operation is as usual.
If the ignition key is turned to OFF and then back to ON again, limp-in mode is
(a record
is retained).
HOW TO READ AND ERASE DIAGNOSTIC
CODES
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1.
2.If battery voltage is low,
trouble
not be output. Be sure to check the battery and
system before, .
If the battery is if connector’
is disconnected,
trouble code memory’
will be erased. Do not ‘disconnect the battery or
until after the diagnostic trouble codes are record ed.,
3.
1.
2.
3.
4.
5.
6.
Turn the ignition switch off before connecting or
disconnecting the scan tool.
Install the interface cartridge cartridge) to the scan
tool
Use the cartridge adapter harness to connect the
scan tool
to the data link connector.
Read the diagnostic trouble codes.
Repair the malfunction while referring to the INSPE CTION
CHART FOR DIAGNOSTIC TROUBLE CODES.
Turn the ignition switch to OFF and then back to ON
again.
Erase the PCM diagnostic trouble code
immediately after erasing the TCM diagnostic troubl e
code.
7.Check that the diagnostic trouble code is normal.
Caution
NOTE
If the transaxle DTC has been set, (excluding cases where
only part of the DTC has been set), the TCM will le t
the PCM know that a DTC has been sent to the PCM
and a problem has occurred. As a result of this, th e PCM
records the DTC for a transaxle problem
After the transaxle has been repaired, the DTC
which has been stored in the PCM will remain
there without being erased, even after the DTC whic h
is store in the TCM has been erased. Therefore the DTC
in the PCM needs to be erased also.

AUTOMATIC TRANSAXLE
ENGINE (NON-TURBO)>
Code Scan tool 14Relay always on (Relay contacts Probable
No.General scan toolare welded closed)
Relay output (switched battery) has more than 3 vol
ts at TCM and 57 (Connectorl
Malfunction of relay when TCM pin 55 (Connector is turned off. Relay should be de-energized whenev erlShort to power on of relay relay and TCM.
ignition switch is OFF.
lShort to power on load side of relay between
relay and TCM
l TCM relay driver circuit stuck ON
EATX relay
l Ignition switch: OFF
ON
OK: Operatingsoundcanbeheard
Measure at the EATX relay connector and the TCM l Disconnect the connector and
measure at the harness side.
lVoltage between (4) and
(55).l Ignition switch: ON
OK: Less than
OKNG
I
NG
Measure at the EATX relay connectorRepair the harness
Continuity between terminal (6) and
2.
.
g r o u n d .
IRepair
Measure at the TCM connector
l Disconnect the connector and
measure at the harness side.
l Voltage between
(57) andground. Disconnect solenoid and pressureswitch assembly.Ignition switch ON
OK: Less than
2. Connect solenoid and pressureswitch assembly.Ignition switch ON
OK: Less than
Measure at the EATX relay connector
l When connector is connected:
l Voltage between (8) and ground.
OK: Ignition switch OFF: Less than
ON:More than
Check the EATX relay Replace the EATX relay
l Check the continuity between
terminals (2)
(8). .
OK: Continuity (0 when systemvoltageisapplied (4) and no nuity when ‘system
voltage is not applied.
OK
Check trouble
lNG
Check the harness wire between the
,
Replace the TCM
relay, pressure switch assembly
Check the harness wire between the
OK Replace the TCM
NGReplace the EATX relay
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AUTOMATIC TRANSAXLE
ENGINE (NON-TURBO)> Troubleshooting.
Relay always off (Relay contacts
Relay output (switched battery) has less than 3 volts at TCM pins 56 and 57 (Connectorl when TCM pin 55 (Connector to energize relay. Relay should be energizedl
whenever key is ON. .
. .Malfunction of relay (open contacts)
Harness or connector between relay coil and
TCM open or short-circuited Harness or connector between relay output
and TCM open-circuited Relay supply lines open-circuited
Relay ground open-circuited
Malfunction of TCM
EATX relay Replace the EATX relay
l Ignition switch: OFF
ON l Check thecontinuity between
O K : can be heardterminals (2) (8).OK: Continuity when systemvoltageisappliedminals (4) and no conti-
nuity when system
voltage is not applied.
OK
Measure at the EATX relay connector
l Disconnect the connector and
measure at the harness side.
1. Voltage between (4) and continuity
between terminal (6) and ground
OK: Continuity
2. Voltage between (4) and ground. l Ignition switch: ON
OK: Battery positive voltage
OK
2 . N G Check the harness wire between the TCM and the EATX relay.
(Open circuit check)
Check the following connector: .Repair
Check the following connector: .
l Connecttheconnectorandmeasure
at the harness side.
l Voltage between (8) and ground.
l Ignition switch: ON
OK:
voltaae
OK
Check the harness wire between the and the EATX
Replace the TCM
Check the harness wire between the
TCM ((terminal
(57)) and EATX
.
Check the following connector: .I
Check trouble symptom.
NG
Replace the TCM
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AUTOMATIC TRANSAXLE
ENGINE
Code Scan tool 18Engine speed sensor circuit
No.General scan tool
Engine speed received at the PCM from the CKP over the CCD bus is less than 384 o f l Harness or connector between crankshaft
position sensor and TCM open or
. .
l of TCM
OK
Measure at the TCM connector l Disconnect the connector and
measure at the harness side.
l Voltage between (46) and ground.
S t a r t t h e e n g i n e .
O K :
C h e c k t h e l
OK
Road test (Refer to
Replace the TCM
Abnormality exists (no diagnostic trouble
. .
Abnormality exists(diagnostic troublecode present)
Recheckdiagnostictroublecodeswhich
were read before the road test
Diagnostic trouble
code output No diagnostic trouble
code displayed
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AUTOMATIC TRANSAXLE
ENGINE (NON-TURBO)> Troubleshooting
Code Scan tool 19 CCD bus communication with Probable cause
No.General scan toolPCM
No CCD messages received for 10 secondsl CCD bus between PCM and TCM short-circuitedl Malfunction of PCM
Measure at PCM connector A-l 07 and data link conne ctor lDisconnect the connector and measure at the harness side.
l Resistance value between (60) and (28)
OK: Less than
OK
Measure at PCM connector A-l 07 and data link conne ctor lDisconnect the connector and measure at the harness side.
l Resistance value between (59) and (27).
OK: Less than
OK
Measure at TCM connector and data link connector NG
l Disconnect the connector and measure at the harness side.
l Resistance value between (44) and (28).
OK: Less than
OK
Measure at TCM connector and data link connector l Disconnect the connector and measure at the harness side.
l Resistance value between (3) and (27).
OK: Less than
NGCheck the followingconnect Repairl
OK
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Replace the TCM
OK
Check trouble symptom.
NG
Replace the PCM

AUTOMATIC TRANSAXLE.
ENGINE. (NON-TURBO)> ,
Code Scan tool 20S w i t c h e d b a t t e r y
No..
General scan tool
I
A voltage is detected on any of the presssure switc hes before the relay is energized.l l o f E A T X r e l a y , or
connector between relay output
short-circuitedl Harness or connector between EATX output and TCM l o f
Measure at solenoid and pressure
switch assembly connector
l Disconnect the connector and
measure at the harness side.
l Voltage between
(5) andground.l Ignition switch: ON
OK: OV
OK
Measure at the TCM connector l Disconnect the connector and
measure at the harness side.
lVoltage between (49) andground.l Ignition switch: ON
O K : o v
OK
NG Check the wire between the
TCM and the EATX relay (Check short to power)
OK
R e p a i r
,
Replace the
and pressure switch assembly and
Check trouble symptom.
Check the harness wire between the
TCM and the EATX relayReplace the TCM
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34AUTOMATIC TRANSAXLE ENGINE (NON-TURBO)> Troubleshooting
Pressure switch circuit: OD
A mismatch has occurred between the shift condition and the pressure switch condition
(ON/OFF) while the vehicle is moving.
SCAN TOOL Data list
NG
22 Overdrive pressure switch l Engine: Stopped
l D i s c o n n e c t t h e E A T X r e l a y
connector and apply systemvoltage to harness-side connector
. O N
OK
Check the transmission fluid level.
OK
Replace solenoid and pressure switch
Check trouble symptom.
NG
Possible cause: Internal transaxle failure (Refer to
Adjust the
fluid level.
P r o b a b l e c a u s e
.
fluid level in transaxle
l Malfunction of pressure switch assembly
lHarness or connector between OD pressure
switch and TCM open or short-circuited
l
of TCM
l Internal transaxle problem
Check the harness wire between the
EATX relay and solenoid and pressureswitch assembly
(Check short to power)
NG Repair
Check the harness wire between sole-noid and pressure switch assembly and
Replace solenoid and pressure switch
assembly
Check trouble symptom.
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Replace the TCM

AUTOMATIC TRANSAXLE
ENGINE
Code Scan tool 22
No.
Pressure switch circuit:
scan tool,
A mismatch has occurred between the shift condition and the pressure switch condition(ON/OFF) while the vehicle is moving. l
MalfunctionlHarness or connector between 2-4 pressure
switch and TCM open or short-circuited
l Malfunction of TCM
Internal transaxle problem
Check the harness wire between the NG TOOL Data 21 2-4 pressure switchl Engine: Stopped
l Disconnect the EATX relay
connector
and apply system to harness-side connector
. O N
OK
Hydraulic pressure check
l Raise vehicle on
allowsfrontwheelstoturnlAttach pressure gauge the 2-4 clutch tap.lMove selector lever to the2 position. Increase throttle opening
to achieve an indicated
vehicle speed of 48 km/h(30 mph). Take a reading of theclutch pressure.OK: 1000(115-145 psi)
2. SCAN TOOL Data list 21 2-4 pressure switch
OK: ON
OK
Replace the TCM
Replace the TCM
Code Scan tool 23
Pressure switch circuit:
No.General scan
A mismatch has occurred between the shift condition and the pressure switch condition
(ON/OFF) while the vehicle is moving. l
Low/high fluid level in transaxle
l Malfunction of pressure switch
lHarness or connector between OD pressure
switch and TCM open or short-circuited
lHarness or connector between 2-4 pressure
s w i t c h a n d T C M
l of l
.. Carry out the inspection procedure for code No. 21. (Referto 134)l Carry out inspection procedure for code No. 22. (Refer
to
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36AUTOMATIC TRANSAXLE
ENGINE (NON-TURBO)> Troubleshooting
Code Scan tool 24Pressure switch cricuit: LRProbable cause
No.General scan tool
A mismatch has occurred between the shift condition
and the pressure switch conditionl
Low/high fluid level transaxle
(ON/OFF) while the vehicle is moving. l
Malfunction of switch l Harness or connector between pressure
switch and TCM open or short-circuited
l Malfunction of TCM
l Internal transaxle problem
SCAN TOOL
list
20 pressure switch
l Engine: Stopped
l D i s c o n n e c t t h e E A T X r e l a y
connector and apply systemvoltage to harness-side connector
terminal (8).
l Ignition switch: ON
OK: OFF
NG Check the harness wire between theEATX relay and solenoid and pressureswitch assembly
(Check short to power)
Hydraulic Possible causes:
l Raise vehicle on hoist lIncorrect transmission fluid levelallowsfrontwheelstoturn.l
Internal transaxle failure (Refer
l Attach oauae to to
l the Replace and pressure
l
Increase speed to1 5 0 01. Take a reading of theclutch pressure.O K : psi)
2. SCAN TOOL list
20 L-R pressure switch
OK: ON Replace the TCM
OK
INTERMITTENT MALFUNCTIONl
Study the DTC information (back-
ground, range of check, setting
condition).l Refer to INTRODUCTION How
to Cope with Intermittent Malfunc-
tion. OK
Check the harness N G Repait and pressure switch assembly andTCM (terminal (10))
(Check short to power)
OK
Check the following connector: .N G Repair
OK
Check trouble
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Replace solenoid and pressure switch
Check trouble symptom.
NG
Replace the TCM
Code Scan tool 25
Pressure switch circuit: Probable cause
No.General scan tool
A mismatch has occurred between the shift condition and the pressure switch conditionl
Low/high fluid level in transaxle
(ON/OFF) while the vehicle is moving. l
Malfunction of pressure switch assembly
l Harness or connector between OD pressure
switch and TCM open or
l Harness or connector between pressure
switch and TCM open or short-circuited
l Malfunction of TCM
Internal transaxle problem
l Carrv out the procedure for code No. 21. (Refer
to
l Carry out the inspection procedure for code No. 24. (Refer
to