1990 MITSUBISHI SPYDER cruise control

17-26E N G I N E A N D E M I S S I O N C O N T R O L Auto-cruise Control System
INSPECTION PROCEDURE 5
When clutch pedal is depressed, auto-cruise control does not
cancel.Probable cause
or clutch circuit may be present. l
Malfunction of the clutch pedal position switch.l
Malfunction of the connector.
l Malfunction of the
l Malfunction of the auto-cruise control-ECU.
Clutch pedal position switch check
(Refer to
Measure at clutch pedal position switchconnectorlDisconnect the connector and mea-sure at the harness side.
l Voltage between terminal (2) and
groundOK: positive voltage
Check the following
OK.Check trouble symptom.NG Check the harness between the clutchpedal position switch and auto-cruise
control-ECU. Repair, if necessary.
Check trouble symptom.Inspectthe harness between theclutchpedal position switch and ground.
NG
Replace the auto-cruise control-ECU.
INSPECTION PROCEDURE 6
When select lever is set to range, auto-cruise control does
not cancel. Probable cause
[Comment]The cause is probably an open-circuit in the output signal circuit in range.l
Malfunction of the position switch
l Malfunction of the connector.
l Malfunction of the harness.
l Malfunction of the auto-cruise control-ECU.
Park/neutral position switch check
Measure at park/neutral position switch -- Starter relay continuity check (Refer to check (Refer toconnector A-l 01.GROUP 16 Starting System.)
ing System.)
l Disconnect the connector and
measure at the harness side.OK
l Voltage between terminal (6) andNG
ground Engine>l Voltage between terminal (5) and and
ground Engine>OK
OK: Battery positive voltage
Check trouble symptom. Check the harness between-the neutral position switch control-ECU. Repair, if necessary.
Check the harness between the park/ Replace control-ECU.,.neutral position switch and ground.
neutral position switch and ground.,
NGNG
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ENGINE AND EMISSION CONTROL Control. System
INSPECTION PROCEDURE 7
When auto-cruise control CANCEL switch is set to ON,
auto-cruise control does not cancel.
[Comment]An open-circuit in the circuit inside the CANCEL sw itch may be present.
Replace the auto-cruise control switch.
INSPECTION PROCEDURE 8l the
The diagnostic result displayed on the scan tool is normal
even though auto-cruise control cannot be set.
[Comment]Because of an open-circuit in the battery backup ci rcuit system, the fail-safe function preventsdiagnostic trouble codes from being memorized and d isplayed even though auto-cruise controlis canceled.
Probable cause
l Malfunction of the connector.
l Malfunction the harness.
l Malfunction of the
Measure at auto-cruise control-ECU
connector
l sure at the harness side.lVoltage between terminal (16) and
around
Battery positive voltage
OKCheck the harness between the
auto-cruise control-ECU and power
supply. Repair, if necessary.
Check the following connector:
Replace the auto-cruise control-ECU.
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17-28ENGINE AND CONTROL Auto-cruise Control System
INSPECTION PROCEDURE 9
Auto-cruise control cannot be set. c a u s e
[Comment] Malfunction of the auto-cruise control main
A malfunction of switches or that the fail-safe fun ction auto-cruise control may beswitch.
present.lMalfunction of the auto-cruise control l Malfunction of the clock l Malfunction of the harnesses or connectors.l of the clutch pedal position switch
lMalfunction of the park/neutral position switch
l Malfunction of control-EC@
Can the auto-cruise control communicate with the sc an
NoInspection for each trouble symptom.(Refer to inspection procedure No. 2 on
Yes
Is input switch inspection possible with the scan tool?
Yes
Inspectionfor trouble symptom.
(Refer to inspection procedure No. 3 on
Dose the input switch code or 27 remain output? Yes
No
Dose the input switch code or 26
No
Replace the auto-cruise control-ECU.
Yes lStop(Refer to inspection procedure No. 14 on lClutch pedal position switch or tion switch input circuit system [code
INSPECTION PROCEDURE 10
Hunting (repeated acceleration deceleration) occurs at the
set vehicle speed.
l Malfunction of the vehicle speed sensor.
A malfunction of vehicle speed sensor or incorrect vacuum in the auto-cruise vacuum pumplMalfunction of the auto-cruise l Malfunctionl Malfunction of the auto-cruise control-ECU.
Revision
Auto-cruise vacuum pump check (Refer to NG Replace
Actuator check (Refer to

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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E N G I N E EMISSION CONTROL Auto-cruise Control
No.
14
15
Check item
Ground
Stop light switch
inputCheck conditions
A? all times
When brake pedal is
depressed
When brake pedal is not
depressed
Normal
condition
Continuity
When stop light switch ON voltage
When stop light switch is
OFF
16
18
19ECU backupAl all times Battery
power supply voltage
When SET switch is pressed When SET switch is ON
When SET switch is notWhen SET switch is OFF
pressed
When RESUME switch is When RESUME switch is
pressed
ONAuto-cruise control
switch input When RESUME switch is not
When RESUME switch is
pressed OFF
o v
When CANCEL switch is
When CANCEL switch is ONBattery positivevoltage
When CANCEL switch is not When CANCEL switch is
pressed
O F F
When vehicle is moved When sensor is ON
Vehicle speed and backwards,
sensor input sensor turns ON and OFF
repeatedly.When sensor is OFF
4.5 or more
20ACC power supplyWhen ignition switch is in ACC position
Battery positive
voltage
23
24
Indicator input
(inside combina-
tion meter)
Diagnosis control
input When driving at constantspeedWhen indicator is illuminated
When constant-speed driving is When indicator is swi
tchedBattery positive
Offvoltage
When ignition switch is ON
or more
25
26Surge absorption
circuit terminal
Auto-cruise
vacuum pump motor input When auto-cruise main switch is ON
When driving at constant
Motor stopped
using the SET switch
When accelerating with the
switch while driving Motor running
at constant speed
When decelerating with the
switch while driving at Motor stopped
constant speed
When
speed driving with the CANCEL Motor stopped
switch Battery positive
voltage
Battery positive voltage
Battery positivevoltage
Battery positive voltage

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
.
Revision

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.
Revision