1990 MITSUBISHI SPYDER light

ENGINE AND EMISSION CONTROL Engine Control
ADJUSTMENT
For models equipped with the auto-cruise
refer to
1. Turn and lights OFF.
Inspect and adjust”
no load.
2. Warm engine until stabilized at
3. Confirm idle at
4. Stop engine (ignition switch OFF).
5. Confirm there are no in
6. Check cable for correct slack:
7.If there is too much
the following procedures.
(1) Turn the ignition switch to ON position (without
starting the
in that condition
motor.’ , ,
4.93.6
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(2) Loosen the adjusting bolt release the cable.
(3) After moving the plate
before the throttle lever starts to
plate back towards the throttle
value amount to biing accelerator cable play
to standard value. .
Standard value: mm in.)
(4) Tighten the adjusting bolts to the specified to rque.
8. Adjust accelerator cable play and confirm thrott le lever
stopper touches the fixed SAS.

AND EMISSION CONTROL Auto-cruise Control System
GENERAL INFORMATION
By using the auto-cruise control, the driver can
drive at the speed he/she likes [in a range of
mately km/h (25-84 mph) Engine
Engine
(Non-turbo)>Powertrain
(Non-turbo)>, km/h (25-124 mph)
Engine (Turbo) and Engine>] without
ing the accelerator pedal.
assemblv
sensor
Input speedsensorsensor
Control switch
Reservoirassembly
Transaxle rangeswitch
Engine (Turbo)
and
Engine> C o n t r o l s w i t c h ,.
Actuator
Auto-cruise control indicator
Main switch
,Stop light switch
Park/Neutralswitch
Clutch pedal position
switch
sensor
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ENGINE AND EMISSION CONTROL Auto-cruise Control
TROUBLESHOOTING ENGINE (NON-TURBO)>
DIAGNOSTIC TROUBLESHOOTING FLOW
Reoccurs not reoccur
No diagnostic troubleDiagnostic troubleNo diagnostic
code or can’t code displayed
with scan tool
NOTE
Before carrying out trouble diagnosis, check all th e following items.
Is the vacuum hose correctly installed and undamag ed?
2. Are the auto-cruise, accelerator, and throttle c ables routed correctly?
3. Do the link assembly and cables move smoothly?
4. Is the play of each cable within its standard va lue?
DIAGNOSTIC FUNCTION
HOW TO READ THE DIAGNOSTIC TROUBLE
When using the scan tool
Connect the scan tool to the data link connector, a nd then
readthe diagnostic trouble codes.
the ignition switch off or
disconnecting the scan tool.
(2)Use the special tools and to
connect the scan tool as illustrated.
If scan tool not available 1. Cycle the ignition key On
Off On Off On within
5 seconds.
2.Count the number of times the check engine/malfunct ion
indicator lamp on the instrument panel flashes on and
off. The number of flashes represents the trouble c ode.
There is a slight pause between the flashes to sepa rate
the first and second digits of the code. Longer pau ses
f l a s h e s s e p a r a t e i n d i v i d u a l t r o u b l e c o d e s .
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ENGINE AND EMISSION CONTROL Auto-cruise
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptomInspectionR e f e r e n c e
procedure No. page
Communication with scan tool is not possible.11 7 - 1 3
Auto-cruise control doesWhen engine speed rises suddenly217-13not cancel.
When brake pedal is depressed
3 17-14
When selector lever is set to range 417-14
When CANCEL switch is set to ON5.
Auto-cruise control cannot be set. 617-15
Hunting (repeated acceleration and deceleration) occurs at the set vehicle speed.7
When the auto-cruise control main switch is ON, the switch indicator on the6 1 7 - 1 5instrument panel does not illuminate. (However, aut o-cruise control is normal.)
Auto-cruise control main switch illumination light does not illuminate.
917-16
Auto-cruise control indicator light inside combinat ion meter does not illuminate.1 7 - 1 6
[However, auto-cruise control is normal.)
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE
with scan tool is not possible.
Probable cause
[Comment] l
Malfunction of the A defect in the power supply system (including grou nd) for the diagnostic line mayl Malfunction of harness.
be present.
Refer to GROUP
Troubleshooting.
INSPECTION PROCEDURE 2 When engine speed rises suddenly, auto-cruise contr ol
does not cancel.
[Comment]A malfunction of powertrain control module may exist.
Replace the powertrain control module. l
Malfunction of the
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ENGINE AND EMISSION CONTROL Auto-cruise Control System
INSPECTION PROCEDURE 3
When brake pedal is depressed,, auto-cruise control does not
cancel.
[Comment]A malfunction of the stop light switch or stop ligh t circuit may exist.
Probable cause
l Malfunction of the stop light switch.
l Malfunction of the connector.
l Malfunction of the
l Malfunction of the PCM.
Stop light switch check.
(Refer to
OK
Measure at stop
switch connector
lDisconnect the connector and mea-sure at the harness side.
l Voltage between terminal (1) and
ground positive voltage
following connectors:
NG
63 and
NG
Check troubleNGsymp Check the l i g h t a n d P C M . R e p a i r ,
OK Check trouble symptom.
Replace the PCM.
light switch and the
ground.
,
INSPECTION PROCEDURE 4
When selector lever is set to range, auto-cruise control does
not cancel.
[Comment]An open-circuit in the output signal circuit in IN range may be present.
OK
and.
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Inspect thebetween the NG
transaxle range switch and PCM.
OK
the PCM.
INSPECTION PROCEDURE 5
When auto-cruise control CANCEL switch is set to ON ,
auto-cruise control does not cancel. Probable cause
[Comment]An open-circuit inside the CANCEL switch may be pre
sent.l
Malfunction of the auto-cruise control switch.
Replace the auto-cruise control

17-16ENGINE AND EMISSION CONTROL Auto-cruise Control System
INSPECTION PROCEDURE 9
Auto-cruise control main switch illumination light does not
illuminate. Probable cause
A malfunction of the auto-cruise control main switc
h, or connector may exist.l
Malfunction of the auto-cruise control mainswitch.l Malfunction of the connector.
l Malfunction of the harness.
Auto-cruise control main switch check(Refer to Replace
OK
Measure at auto-cruise control main
switch connector
lDisconnect the connector and mea-sure at the harness side.
l Voltage between terminal (2) and
groundOK: Battery positive voltage
II
OK
Check trouble symptom.
N Gpower supply. Repair, if necessary.
Check the harness between the
auto-cruise control main switch and
rheostat. Repair, if necessary.
INSPECTION PROCEDURE 10
Auto-cruise control indicator inside combination me ter does
not illuminate. (However, auto-cruise control is no rmal.)Probable cause
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l
Malfunction of the bulb.
l Malfunction of the
l Malfunction of the connector.
l Malfunction of the PCM.
(Refer to
illuminate when terminal (22) of PCM connector A-l 06 is

ENGINE AND EMISSION CONTROL Auto-cruise Control
When using a voltmeter
1.Use the special tool to connect a voltmeter between the
ground terminal and the diagnostic output terminal of
d a t a l i n k c o n n e c t o r .
2.In the same way as when using the scan tool, turn t he
ignition switch to ON and turn on the auto-cruise c ontrol
main switch. Then take a reading of the diagnostic trouble.
codes from the movement of the needle on the voltme ter.
HOW TO READ DIAGNOSTIC TROUBLE CODES FROM A VOLTMET ER
Example of diagnostic trouble code voltage waveformNormalvoltage waveform
For diagnostic trouble code No. 24
NOTE
Other on-board diagnostic items are also output as voltage waveforms corresponding to diagnostic troub le code
numbers.
HOW TO ERASE DIAGNOSTIC TROUBLE CODES
The diagnostic trouble codes can
erased by disconnecting the cable from the battery for 10 seconds
or more and then reconnecting it, or by the followi ng procedure.
1. Turn the ignition switch to ON.
2.With the SET switch at the ON position, turn the ma in switch to ON, and within 1 second after this,
turn the RESUME switch to ON.
3. With the SET switch once more at the ON position , turn the stop light switch ON for a continuous
period of 5 seconds or more.
Auto-cruise control switch
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HOW TO READ INPUT SWITCH CODES
1. Connect the scan tool or a voltmeter to the data link
connector. (Refer to
2.With the ignition switch in the ON position, turn t he S E T
switch to the ON position.
3.Within 1 second after turning the auto-cruise contr ol main
switch to ON, turn the RESUME switch to ON.
4. Operate each switch listed in the input inspecti on table
and take a reading of the input switch codes with t he
scan tool or the fluctuation of a voltmeter.
NOTE
These codes are output as voltage waveforms in the
same way as above.

AND CONTROL
Input Inspection Table
.
Code No.Input operation Operation
21SET switch ONAuto-cruise control-ECU judges that SET switch is O
N
22RESUME switch ON Auto-cruisecontrol-ECU judges that ON
23 Stop light switch
(ON when brake pedal depressed) Auto-cruise control-ECU judges that stop light swit
ch is ON
24
25
26Auto-cruise control-ECU judges that vehicle speed i s 40
km/h (25 mph) or higher ,Vehicle speed signal
Auto-cruise control-ECU judges that speed is lower
than 40 km/h (25 mph)
lClutch pedal position switch Auto-cruise control-ECU judges that clutch (ON when clutch pedal depressed) Park/neutral position switch switch or park/neutral position ONl(ON when selector lever in range)
27 CANCEL switch ON Auto-cruise control-ECU judges that
ON
28 Throttle position sensor signal Auto-cruise control-ECU judges that throttle
voltage is 1.5 or more
29Closed throttle position switch,Auto-cruise control-ECU judges
switch is OFF
INSPECTION CHART FOR DIAGNOSTIC TROUBLE CODES,
Code No.
On-board diagnostic items page
11Auto-cruise vacuum pump drive system
12
14
15
Vehicle speed signal system
Auto-cruise vacuum pump power supply system
Auto-cruise control switch
17-21
.
16
17
Auto-cruise control-ECU
Throttle position sensor system
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