1990 MITSUBISHI SPYDER light

E 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
INSPECTION PROCEDURE: FOR DIAGNOSTIC TROUBLE CODES
Code Auto-cruise vacuum pump drive system
[Comment]
This diagnostic trouble code is output if the release valve, control valve and motor drive signals
from the auto-cruise vacuum pump are not input to t he auto-cruise control-ECU.
(Refer to
l Malfunction of the auto-cruise vacuum pump
l Malfunction of the auto-cruise control-ECU
Measure at
control-ECU
connector
lDisconnect the connector and mea-sure at the harness side.
lVoltage between terminal (12) andground (for driving release valve)lVoltage between terminal (13) andground (for driving control valve)
lVoltage between terminal (26) andground (for driving motor)
OK: Battery positive voltage
Measure at auto-cruise vacuum pump
connector Stop light switch check
I
(Refer to l sure at the harness side.
l Voltage between terminal andgroundOK: Battery positive voltage
OK
auto-cruise control main switch and
auto-cruise vacuum pump. Repair, if
N G
and
OK
Check trouble symptom.
following
OK
Check trouble symptom.
NG
Replace the control-ECU.
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C h e c k t h e b e t w e e n t h eauto-cruisev a c u u m p u m p a n d
auto-cruise control-ECU. Repair, if
necessary.

ENGINE AND EMISSION CONTROL Auto-cruise Control’
Code 2 Vehicle speed signal system
[Comment]l Malfunction of the vehicle This diagnostic trouble code is output if the vehic le speed signals from the vehicle speed sensor l of connectorare not input to the auto-cruise control-ECU when t he vehicle speed is 40 km/h (25 mph) l
Malfunction of the harness
or more. l Malfunction of the auto-cruise
Check the vehicle speed sen(Refer to GROUP 54 CombinationMeter.)
1. NG
Measure at the vehicle speed sensor connector Check the following connector. l Disconnect the connector, and measure at the
harness side.O K
1. Voltage between 1 and ground (Ignition switch: ON)
NG
System voltage
2.Voltage between 3 and ground2. N G(Ignition switch: ON)
OK: 4.6 5.2 3.Continuity between 2 and ground3. N G
OK: Continuity
OK
Check trouble symptom.
N G
Check the harness between the speed sensor
Check the following
OKNG
Check trouble symptom.
NG
Check the harness between the auto-cruise ECU and the vehicle soeed sensor connector.
OKNG
Replace the auto-cruise control-ECU.
and ignition switch connector
OK
Check the ignition switch.
(Refer to GROUP 54 , ,
Check the harness between the vehicle speed sensorand the ground. Repair, if necessary.
Code Autocruise vacuum pump power supply systemProbable cause
[Comment]
This code will be output when the drive signals for the auto-cruise vacuum pump release valve,
control valve and motor are not input to the auto-c ruise control-ECU.l
the stop light l
Malfunction of the connector
l
l of the auto-cruise
at the auto-cruise vacuum
l Disconnect the connector and
l Voltage between terminal (1) and
OKN G Check the harness between the cruise vacuum pump and the cruise control-ECU.
and
Replace the auto-cruise control-ECU.
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ENGINE AND EMISSION CONTROL Auto-cruise Control
INSPECTION CHART FOR SYMPTOMS
Communication with
scan tool is not
possible. Communication with systems is not possible.
Communication with auto-cruise control-ECU only
is not possible.1
2
Input switch inspection using the scan tool is not possible. (However,
diagnostic inspection is possible.)3 .
Auto-cruise control When brake pedal is depressed 4 does not cancel. When clutch pedal is depressed
When select lever is set to range
When CANCEL switch is set to ON
5
17-26
I 7 17-27
Trouble symptomInspection
procedure No.Reference page
The diagnosis result displayed on the scan tool is normal even though
auto-cruise control cannot be set.
Auto-cruise control cannot be set.I9
Hunting (repeated acceleration and deceleration) oc curs at the set vehicle
speed.I1
When the auto-cruise control main switch is ON, the switch indicator on the
instrument panel does not illuminate. (However, aut o-cruise control is normal.)
Auto-cruise control main switch illumination light does not illuminate.111 7 - 2 9 , .
1217-29
Auto-cruise control indicator light inside combinat ion meter does not illuminate.
(However, auto-cruise control is normal.)13
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ENGINE AND EMISSION System
.,
INSPECTION PROCEDURE 3
Input switch inspection using the scan tool is pdssible.
(However, diagnostic inspection is possible.)
I
[Comment]A malfunction of auto-cruise control switch circuit system may be present.l
Malfunction of the auto-cruise control l Malfunction of the clock spring .
l of the connector.
l Malfunction of the harness.
.
NG
(Refer to
Measure at clock spring connector
l sure at the harness side
l Voltage between terminal (2) and
groundOK: Battery positive voltage
OK
Check trouble symptom.
C h e c k t r o u b l e spring and auto-cruise
INSPECTION PROCEDURE 4
When brake pedal is depressed, auto-cruise control does not
cancel.Probable , ,
[Comment]A malfunction of stop light switch or a malfunction of stop light circuit may be present.l
Malfunction of the stop light switch.
l Malfunction of the connector.
l Malfunction of. the
l Malfunction of the auto-cruise control-ECU.
Does stop
illuminate?
No
Replace the auto-cruise control-ECU.
lDisconnect the connector and mea-sure at the harness side.
Check trouble symptom.Check the following connectors:
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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 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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