engine MITSUBISHI SPYDER 1990 Service Repair Manual

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 Auto-cruise Control
AUTO-CRUISE CONTROL
REMOVAL AND INSTALLATION
Engine
(Non-turbo)>
Engine (Turbo)
and
Engine>
76
4
17
00003900
Auto-cruise control cable, throttle
cable and accelerator cable
removal steps
1. Link protectorl Auto-cruise control cable adjustment to .2 .Engine (Turbo) and Engine>
3 .
10. Link bracket Engine
turbo)>
Reservoir assembly and speed
control assembly removal steps
Engine (Non-turbo)>
11. Vacuum hose connection
4. Accelerator cable 12.
13. control assembly
14. Actuator upper bracket
Vacuum pump and actuator
15. Actuator lower bracket
Link assembly removal steps1. Link protector
l Auto-cruise control cable adjustment(Refer to 5. Speed control assembly connection Engine 6. Auto-cruise control cable connection Engine (Turbo)
and Engine>7. Throttle cable connection8. Accelerator cable 9. Link assembly removal steps
Engine (Turbo)
and Engine>
16. Auto-cruise control cable
connection
17. Auto-cruise vacuum pump andactuator assembly
18. Vacuum hose
19. Auto-cruise vacuum pump
20. Actuator
21. Actuator bracket
TSB Revision

ENGINE AND EMISSION CONTROL
Engine (Non-turbo)> (Turbo) and
Powertrain control module removal
steps Engine (Non-turbo)>
l Air cleaner22. Powertrain control module bracket23. Powertrain control module
Auto-cruise removalsteps Engine (Turbo) and Engine>
l side
Auto-cruise control main switch
removat steps
25. Instrument panel switch 26. Auto-cruise control main
TSB Revision

17-42ENGINE AND EMISSION CONTROL Auto-cruise Control System
CAUTION:Beforeremoval of air bag module and clock spring, refer t o the following sections:GROUP SRS Service Precautions.GROUP Air Bag Modules Clock Spring.
5.9 Nm4.3
41Nm30
2 8
Auto-cruise control switch and
clock spring
steps
27. Air bag module (Refer to GROUP
Bag
Modules and Clock Spring.)
28. Auto-cruise control
29. Steering wheel
30. Steering column upper cover
31. Steering column lower cover
l
under cover (Refer to
GROUP Panel.)
32. Clock spring (Refer to GROUP
Bag
Modules and Clock Spring.) 3 8
Sensor removal steps
33. Throttle position sensor
Engine (Turbo) and Engine>
34. Transaxle range switch
Engine (Non-turbo) 35. Park/neutral position switch Engine AA and Engine
36. Stop light switch
37. Clutch pedal position switch
Engine (Turbo) M/T and Engine 38. Vehicle speed sensor Revision

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
TSB Revision

ENGINE AND EMISSION CONTROL Auto-cruise System’,
AUTO-CRUISE CONTROL INDICATOR CHECK 17200190052
(1) Remove the combination meter.(Refer to GROUP 54
Combination meter.)
(2) Check the continuity between terminals (10) and (16).
If there is no continuity, replace the auto-cruise control
indicator.
CLOCK SPRING CHECK
Refer to GROUP Air Bag Module and Clock Spring.
THROTTLE POSITION SENSOR CHECK
Engine
(Turbo) and
Engine>17200290011
Refer to GROUP On-vehicle Service.
VEHICLE SPEED SENSOR CHECK Engine
(Non-turbo) A/T>, INPUT SPEED SENSOR OR OUTPUT
SPEED SENSOR CHECK
Engine (Non-turbo)
Refer to GROUP 54 Combination Meter.
TSB Revision

Emission
ENGINE AND EMISSION CONTROL
GENERAL INFORMATION
The emission control system consists of the following sub-systems:
l Positive crankcase ventilation system
l Evaporative emission control system
l Exhaust emission control system
SERVICE SPECIFICATIONS
Evaporative emission purge solenoid coil resistance
[at
Electric EGR transducer solenoid coil resistance
[at
Standard value
25-35
.
2 5 - 3 5
TROUBLESHOOTING17300070052
Symptom Probable causeRemedy,
Engine will not start or
Vacuum hose disconnected or damaged. replace is hard to start.
The EGR valve is not replace
Malfunction of the evaporative emission purge or solenoid.
Rough idle or engineThe EGR valve is not closed. Repair or replace
stalls.Vacuum hose disconnected or damaged.Repair or replace
Malfunction of the crankcase ventilationReplace
valve.
Malfunction of the purge control system.
Checkthe system; if there is a prob-
lem, check its component
Engine hesitates or
poor acceleration.
Excessive oil
sumption.
Poor fuel mileage.
Malfunction of the exhaust gas recirculation
system.
Positive crankcase ventilation line clogged.
Malfunction of the exhaust gas recirculation
system.
Check the system; if there is a
check its component parts.
Check positive crankcase ventilation
system.
Checkthe system; if there is a
check its component parts.
TSB Revision

17-46ENGINE AND EMISSION CONTROL
VACUUM HOSES
VACUUM HOSE
Two wayvalve
II
To heater and
control
EVAPcanister
Vent
EVAP
solenoid
T oengine block
EVAPem i s s i o nBack pressure EGR andelectric EGR transducer s o l eassembly
Revision

Emission
ENGINE AND EMISSION
VACUUM CIRCUIT
.
DIAGRAM
intake air plenum
b o d y
To combustion
Electric EGRtransducer
EGR valve
EVAPcanister
EVAPpurge solenoid
(ON: open)
V A C U U M H O S E C H E C K
1.Using the VACUUM HOSE ROUTING as a guide, check that
the vacuum hoses are correctly that there are
no bends or damage to the hoses.
VACUUM HOSE
1.When connecting the vacuum should securely
inserted onto the nipples.
2.To connect the hoses correctly, use the VACUUM HOSE POUT-
ING as a guide.

Emission Control System
ENGINE AND EMISSION CONTROL Engine
POSITIVE CRANKCASE VENTILATION SYSTEM
GENERAL INFORMATION
The positive crankcase system (PCV)
prevents the escape of blow-by
from inside
the crankcase into the atmosphere.
Fresh air is sent from the air cleaner into the
case through the breather hose, to be mixed with the blow-by gases inside the crankcase.
The blow-by gas inside the crankcase is drawn
into the intake manifold through positive crank-
case ventilation valve.
The plunger inside the positive crankcase
tion valve is designed to lift according to intake
manifold vacuum, regulating the flow of blow-by.
The blow-by gas flow is decreased during low load
engine operation to maintain engine stability, and
is increased during high load operation to improve
the ventilation performance.
SYSTEM DIAGRAM
Positive crankcase
Positive crankcaseventilation valve
ventilation valve
Ventilation hose
Ventilation hose Breather hose
Breather hose
COMPONENT LOCATION
Positive crankcase ventilation valve
Valve
Revision