check engine MITSUBISHI SPYDER 1990 Service Repair Manual

ENGINE AND EMISSION CONTROL Auto-cruise
INSPECTION PROCEDURE 11
When the auto-cruise control main switch is ON, the switch
indicator on the instrument panel does not illumina te.
(However, auto-cruise control is normal.) Probable cause
[Comment]l auto-cruise control main
Blown bulb in auto-cruise control main switch.switch.
Replace the auto-cruise control main switch.
INSPECTION PROCEDURE 12
Auto-cruise control main switch illumination light does not
illuminate. Probable cause
[Comment]A malfunction of auto-cruise control main switch, h
arness, or connector may exist.l
Malfunction of the auto-cruise control main
switch. Malfunction of the connector.
l Malfunction of the harness.
(Refer to
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
NG
Check trouble symptom.
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ENGINE AND EMISSION CONTROL Auto-cruise Control
INSPECTION PROCEDURE 13
Auto-cruise control indicator inside combination meter does
not illuminate. (However, auto-cruise control is no rmal.)Probable cause
[Comment]A malfunction of the bulb, the connector harness may be present. l
Malfunction of the bulb.
l Malfunction of the harness. Malfunction of the connector.
l Malfunction of the auto-cruise control-ECU.
to
illuminate when terminal (23) of
Check trouble symptom.
Replace the auto-cruise control-ECU. Check the harness between the
combination meter and auto-cruise
control-ECU.
if
INSPECTION PROCEDURE 14
Stop light switch input circuit system check (Code No. 23)II
Stoplight switch check (Refer to
Check the harness between jumper connector and
auto-cruise control-ECU. Repair, if necessary.
INSPECTION PROCEDURE 15 C l u t c h p e d a l p o s i t i o n s w i t c h
or p o s i t i o n s w i t c h i n p u t c i r c u i t s y s t e m c h e c k
( C o d e N o . 2 6 )

Check trouble symptom.
OK
NG
Check the harness between clutch pedal position swi tch and
auto-cruise control-ECU. Repair, if necessary.
Park/neutral position switch check (Refer to
Starter relay continuity check
(Refer to GROUP 16 Starting System.)
57
Check trouble symptom. Check the harness between auto-cruise control-ECU and power
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ENGINE AND EMISSION CONTROL ,
CHECK AT THE ECU TERMINALS
NormalCheck conditionsTermi-nal No.
1
Check item
Clutch pedal
position switch
input
Park/neutral
position switch
input
ECU power supply
Power supply for
OD signal control
Closed throttle
position switch
output
Throttle position sensor input
Ground
output
switch input
vacuum pump
Irelease valve and
valve input
pumpelease valve and
valve input
positive
voltage
When pedal is not depressed When clutch pedal positi
on
switch is OFF
When pedal is depressed When clutch pedal position
is ON
When selector lever is in a
position other than
range
When selector lever is in
range
When park/neutral position
switch is OFF
When park/neutral
switch is
Battery positive voltage
Battery positive
voltage
When ignition switch is ON
Battery positive
When ignition switch is ON
When accelerator pedal isWhen closed throttle position
depressed switch is OFF
,
When accelerator pedal is not
When throttle position
depressedswitch is ON.
When accelerator pedal is fully depressed
When accelerator pedal is releasedov
Continuity6At all times
all times
When OD switch is ON
OD switch is OFF
OD switch is ON
OD switch is OFF
I
driving at constant
speed using the SET switch
When accelerating with the
RESUME switch while driving
constant speed
When decelerating with the
SET switch while driving at
speed
canceling Release valve open
driving with the CANCEL Control valve open
C o n t i n u i t y
positive
8
10
Battery positive
voltage
positive
voltage
positive
voltage
,
11
12
13
12
13
12
13
12
Release valve closed
Control valve open
13
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I

ENGINE AND EMISSION CONTROL Auto-cruise
ON-VEHICLE SERVICE
AUTO-CRUISE CONTROL CABLE CHECK AND ADJUSTMENT
Engine
(Non-turbo)>Link assemblyAccelerator cable
Adjusting bolts
To intake manifold
assembly
Speed control assembly
Engine (Turbo)
and
Engine>
ActuatorLink assembly
I
Accelerator cable
Auto-cruise vacuum
.
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A u t o - c r u i s e C o n t r o l S y s t e m
1.
2.
Remove the link protector. (Refer to
Check the slack in each of the inner cables in the
accelerator cable, auto-cruise control cable and th rottle
cable.
If the slack in an inner cable is excessive, or if there
is no play, loosen the adjusting bolts and the nuts in
the throttle lever and each link, to release the th rottle
lever and each link. (The bolts and nuts should not be
removed.)
Engine (Non-turbo)>Link (A)
Engine (Turbo) and
nut
Accelerator cableLink(A)
Engine (Non-turbo)>
cable.
Engine (Turbo) and Engine>
Throttle cable
CABLE
1. Adjust with the adjusting nut A so when the
hits
the stopper, the accelerator cable play (inner cabl e play
reaches the standard value.
Standard value:
O-l mm in.)
2-3 mm in.)
2. Fix the accelerator cable with the lock nut.
THROTTLE CABLE
1.Adjust with the adjusting nut so when the lever hits
the link A, the throttle cable play (inner cable play) reaches
the standard value. Standard value:
mm in.)
2. Fix the throttle cable with the lock nut.
3.Tighten the throttle lever-side adjusting bolt to t he specified
torque.
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ENGINE AND EMISSION CONTROL Auto-cruise Control System
Adjusting nut(C)
c o n t r o l - - - - - -
ON
AUTO-CRUISE CONTROL (Turbo)
and
Engine>
1.Adjust with the adjusting nut so when the lever stopper
hits the link B, the auto-cruise control cable play (inner
cable play) reaches the standard value.
Standard value:
mm in.)
2. Fix the auto-cruise control cable with the lock nut.
SPEED CONTROL CABLE
Engine
Hold the link at the position where the lever touches
the link B. Then fix the speed control cable.
AUTO-CRUISE CONTROL SYSTEM
OPERATION CHECK
17200160048
AUTO-CRUISE CONTROL MAIN SWITCH INDICATOR
LIGHT
1. Turn the ignition key to ON
2.Check that the indicator within the switch illumina tes when
the main switch is switched ON.
AUTO-CRUISE CONTROL
1. Switch ON the main switch.
2. Drive at the desired speed within the range of approximately
km/h mph) Engine
(Non-turbo)>,
km/h (25-124 mph) Engine
(Turbo) and
Engine>.
3. Switch ON the SET switch.
4. Check to be sure that when the switch is release d the
speed is the desired constant speed,
.
NOTE
‘If the vehicles speed decreases to approximately 1 5 km/h
(9 mph) below the set speed because of climbing a h ill
for example, the auto-cruise-‘control will be cance led.
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17-36ENGINE AND EMISSION CONTROL Auto-cruise Control System
RESUME switch: ON
SET switch: ON 6
CANCEL switch: ON
RESUMEswitch: ON1
SPEED-INCREASE
1. Set to the desired speed.
2. Switch ON the RESUME switch. 3. Check to be sure that acceleration continues whi le the
switch is hold, and that when it is released the co nstant
speed at the time when it was
becomes the
driving speed.
SPEED REDUCTION
1.
2.
3.
Set to the desired speed.
Switch ON the SET switch.
Check to be sure that deceleration -continues while the
switch is pressed, and that when it is released the constant
speed at the time when it was released becomes the
driving speed.
NOTE
W h e n t h e v e h i c l e s p e e d r e a c h e s t h e l o w l i m i t[approximately 40 km/h (25 mph)] during deceleratio n,
the auto-cruise control will be canceled.
RETURN TO THE SET SPEED BEFORE
CANCELLATION AND AUTO-CRUISE CONTROL
CANCELLATION
1. Set the auto-cruise speed control.
2.When any of the following operations are performed while
at constant speed during auto-cruise control, check if
normal driving is resumed and
occurs.
(1) Switch ON the CANCEL switch.
(2) The brake pedal is depressed.
(3) The clutch pedal is depressed. (M/T)
(4) The selector lever’is moved to the
range.
3.At a vehicle speed of 40 km/h (25 mph) or higher, c heck
if when the RESUME switch is switched ON, vehicle s peed
returns to the speed before auto-cruise control driving
was canceled, and constant speed driving occurs.
4. When the main switch is turned to OFF while driv ing
at constant speed, check if normal driving is resum ed
and deceleration occurs.
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17-38ENGINE AND EMISSION CONTROL Auto-cruise’ Control
closed>

II
I
Battery
0 0 0 0 0 2 6 4
35 mm (1.38 in.) or more
3. Connect terminal (1) to the battery terminal, and
connect terminals (2) and (3) to the battery
terminal.
4.Check to be sure that the vacuum gauge shows a read ing
of 53 (15.7 or more when (4) is
connected to the battery
terminal.
5.In this condition, check to be sure that the vacuum gauge
shows a 20 (6 or less when terminals (2)
and (3) are disconnected from the battery.
ACTUATOR
Engine (Turbo) and Engine>
1. Remove the actuator.
2.Apply negative pressure to the actuator with the va cuum
pump and check that the holder moves more than 35
mm (1.38 in.). In addition, check that there is no change
in the position of the holder when negative pressur e is
maintained in that condition.
3.First install the actuator and then inspect and adj ust the
auto-cruise control cable (Refer to
SPEED CONTROL SERVO Engine (Non-turbo)>
Electrical Tests
(1) Turn ignition switch to the ON position.. With the speed
control switch in the ON position, set up a voltmet er to
read battery voltage and connect the riegative lead to
a good chassis ground.
(2) Disconnect the four-way connector going to the servo.
Test pin 3 of the main harness four-way connector f or
battery voltage.
If not, check the power supply circuit for the spee d control
servo.
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C o n t r o l
(3) Connect a jumper wire
servo connector of the main harness and pin 3 of the
speed control servo.The other three pins
should show battery voltage. If not, replace the se
rvo.
(4) Using an ohmmeter, connect one lead to
ground. With the
servo connector of the main harness, the meter shou ld
show continuity. If not, repair the ground
as
necessary. .
Vacuum Test
(1) Remove the speed control cable at the throttle
body end.
(2)Disconnect the electrical connector and
lines at the servo.
(3) Connect battery voltage to pin No. 3 of the
(4) Ground the remaining three servo pins 1, 2
(5) Connect a hand held vacuum pump to the servo va cuum
nipple and apply 10 to 15 inches of vacuum.
(6) The cable should pull in and hold for as long a s vacuum
is applied.
VACUUM SUPPLY Engine (Non-turbo)>
(1) Disconnect the vacuum hose at the servo and ins tall
a vacuum gauge in the hose.
(2) Start engine and observe the gauge at idle. The vacuum
gauge should read at least ten inches of mercury. Shut
off engine, the vacuum should continue to hold inches
of mercury.
(3) If vacuum does not meet this requirement, check and
correct the following vacuum leaks:
Vacuum lines
Vacuum reservoir
Servo vacuum
Poor engine performance
I-cruise control
AUTO-CRUISE CONTROL RELAY
Engine (Non-turbo)>
Battery voltage
Power
isnot supplied
Power is supplied
Terminal
,
,
,0

ENGINE AND EMISSION CONTROL Control
INSPECTION. .
AUTO-CRUISE CONTROL MAIN SWITCH CHECK
SwitchTerminal No.
ON0
0 0
AUTO-CRUISE CONTROL SWITCH CHECK
17200120082
Measure the resistance between the terminals when e ach
of the SET, RESUME and CANCEL switches is pressed.
If the values measured at this time correspond to t hose in
the table below, then there is no problem.
Switch position Resistance between terminals
Switch OFFNo continuity
CANCEL switch ONApprox. 0
RESUME switch ONApprox. 820
SETswitch ONApprox. 2,700
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