1990 MITSUBISHI SPYDER check engine

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

AUTOMATIC TRANSAXLE
ENGINE (NON-TURBO)> ‘Troubleshooting,
cause
Malfunction range lHarness or connector between transaxle rangesensor and open or short-circuited
lTransaxle range sensor ground open-circuitedl Malfunction of
Code Scan tool 28Check shifter signal
No.General scan tool
Case 1 Invalid code timer has expired (100 msec).
Case 2 Third occurrence of setting data error flag since start-up
SCAN TOOL Data list
26 Transaxle range sensor 43 l Ignition switch: ON
OK: Shift lever position
2, L: ONOtherthan OFF
NG
OK
SCAN TOOL Data list Check the transaxle range sensor Replace the transaxle range sensor 27 Transaxle range sensor 41.. . . I
OK:
(Refer to
Check the following connector:
l
INTERMITTENTl the DTC information Check the harness wire between the
transaxle ranae sensor and TCM
(Check
power)
ground. range of check, settingcondition).l
Refer to INTRODUCTION How
to Cope with Intermittent Malfunc-
tion.
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AUTOMATIC TRANSAXLE
ENGINE (NON-TURBO)> Troubleshooting
Code Scan tool Throttle position signal
No.General scan tool
l Throttle angle less than 6 degrees, or Throttle gre ater than 120.6 degrees.
l The engine must be running.
OKCheck that the engine lamp is on
- - R e f o r m P C M d i a g n o s t i c s . the enaine
c a u s e
l Malfunction of sensorlHarness or connector between sensor and TCM open or short-circuited
l or connector sensor output and TCM open or short-circuitedl Malfunction of l Malfunction of . .
I ,
O K :
00 Throttle position sensor
l Disconnect the connector Check the following connector:l Engine ground connectionl l Ignition switch: ONI ,
,OK: More than OKA b n o r m a l i t y(no diagnostic trouble
connector
Abnormality exists trouble codepresent)
To INSPECTION CHART FOR
TROUBLE CODES
(Refer to
Measure at TCM connector l Disconnect the connector and
measure at the harness side Check the following connector:
l Connector
disconnected
l Voltage between (52) and ground
l Ignition switch: ON
OK: More than
Check the harness wire between the
TCM and the throttle position sensor
Measure at TCM connector and Check the harness wire between the
throttle position connector TCM and the throttle sensor
l Disconnect the connector and
measure at the harness side.
l
Less than
OK
,
.
Check the following connector:
l Replace the TCM
NG
Repair
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