sensor MITSUBISHI SPYDER 1990 Service Repair Manual

ABS Troubleshooting
TERMINAL RESISTANCE AND
CHECK
7 13513413313213113~29~28127126~25124123122~21~20~1~
1.
2.
3.
4.
5.
Turn the ignition switch to
D i s c o n n e c t t h e A B S - E C U
Measure the resistance and check for continuity bet ween
the terminals of the connector
while referring to the check chart.
N O T E
,
1.When measuring resistance and checking continuity,
a harness for checking contact pin pressure should;
be used instead of inserting a test probe.
2. Checks do not have to be carried out in the orde r
given in this chart.
Caution
Be careful not to check at terminals, or
such as harness,’ ABS-ECU; ohmmeter will
damaged.
If the ohmmeter shows any deviation from the
condition, check the corresponding sensor; actuator
related electrical wiring, and repair or replace.
After repair or replacement, recheck with the ohmmeter
to confirm that the repair or replacement has corre cted
the problem.
Terminal No.Check point Check conditionNormalcondition
Motor monitorAtall timesContinuity
ABS-ECU ground At all times Continuity
sensor
sensor groundIgnition switch: OFF
1At all timesContinuity
2 6 - 2
Motor relay
2 7 - 2Valve relay
sensor
Ignition switch: OFF
Ignition switch: OFF
Ignition switch: OFFApprox. 50
Approx. 100
32-15F.L. sensor
33-31F.R. sensor
Ignition switch: OFF
Ignition switch: OFF.
1
ground At all timesC o n t i n u i t y
I’
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harness 356
ABSOn-vehicle ,
O N - V E H I C L E .
ABS OPERATION CHECK
WHEEL SPEED OUTPUT VOLTAGE CHECK
1. ‘Lift
the vehicle and release the parking brake.
the ECU harness connector and
from the harness side
Caution -I-,.
Set the special tool and use the check connector to
check.
not connect the Tool)
marked with except the waveform
on a driving test.
connector to the ECU.
3. Rotate the wheel to be measured at.
1 rotation per second, and. check the output volta ge
using a circuit tester or an oscilloscope.
Wheel speed Front left
Front right left
Output
When with a voltmeter:
70
or more
When measuring with an
200 or more
. .
.
Connector terminal arrangement
Terminal arrangement shown on the
special tool connector
0 0 0 0 0 0 7 6
Caution
1.Use the special tool 356) to check the ABS-ECU
terminal and resistance.
2. The ABS-ECU connector terminal arrangement is’
different from the terminal arrangement shown on
the tool connector. So take the readings
t h e t e r m i n a l n u m b e r s the’
checking.
Example
ABS-ECU connectorTerminal number shown on
terminal number the special tool connector
181
4.If the output voltage is lower than the above value
s, the
reason could be as follows:
l Faulty wheel speed sensor.
So replace the wheel speed sensor.
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On-vehicle
When turning by, hand
-:--‘---t---i-.-i-.-;----~---!---
--!-4--
When idling (5-6 gear (manual transaxle) or (automatic transaxle
10.01
Inspecting Wave Forms With An Oscilloscope
Use the following to wave
from wheel sensor’
lStart the engine, and by engaging
gear (vehicles manual transaxle) or
(vehicles with the rear
so that they, at a
NOTE
1. Check the connection of the
before using the oscilloscope.,
2. The wave form measurements can also be
the vehicle is actually moving.
3. The output voltage will be low when the wheel sp eed
‘is low, and similarly it will be higher as the whe el speed
Points In Waveform Measurement
SymptomProbable causesRemedy
Too small or zero waveform
amplitude
Waveform amplitude fluctuates ex-
cessively (this is no problem if the minimum amplitude is 100
or
more)
Faulty wheel speed sensor
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Axle hub eccentric or with large
Replace sensor
Replace hub
Noisy or disturbed waveform Open circuit in sensor
Open circuit in harness Replace sensor
C o r r e c t
Incorrectly mounted wheel speed sensor
ABS rotor with missing or damaged teeth
NOTE
The wheel speed sensor cable moves following motion of the front or rear is likely . . . . . it has an open circuit only when driving on rough roads and it functions normally on It IS,
recommended to observe sensor output voltage wavefo rm also under special conditions, rough

ABS Wheel Sensor
WHEEL SPEED SENSOR
REMOVAL AND
Operationl Splash Shield Removal only,
(Refer to GROUP 42 Fender.)
FrontRear
1
1
3
Front wheel speed sensor removal
steps
1. Clip
2. Front wheel speed sensor
Front
rotor removal
3. Drive shaft
A B S r o t o o
(Refer to GROUP 26 Drive
Shaft.)
wheel speed sensor removal
4. Rear wheel s e n s o r
Rear ABS rotor removal steps
5. Drive shaft ABS rotoo
(Refer to GROUP 27 Drive
Shaft.)
NOTEThe ABS rotor is integrated with the drive shaft an d is notdisassembled.
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ABS W h e e l . , . . . ,
Front Rear
ed
ce
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I
FRONT WHEEL SPEED
S P E E D S E N S O R
The clearance between the wheel speed sensor
rotor’s toothed surface is not but the
distance between the the
rotor’s toothed surface.. .
Standard value: 28.2-28.5 mm (1.11-1.12 in.)
INSPECTION
WHEEL SPEED SENSOR CHECK
Refer to GROUP Wheel Speed Sensor Check.
WHEEL SPEED SENSOR INSULATION
(1) Remove all the wheel sensor,
and then
between (1)
(2) and body of the speed sensor.
S t a n d a r d v a l u e : 1 0 0
or
(2) If the wheel speed
the standard value replace speed
sensor.
ABS ROTOR CHECK
Check whether ABS rotor is broken or deformed, and, if so,
replace the ABS rotor.

G-SENSOR
REMOVAL AND INSTALLATION
CautionDo not drop the G-sensor or subject it to shocks.
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ABS G-Sensor
INSPECTION
G - S E N S O R C H E C K
(1) Disconnect the connector the
special tool (test,; harness set:,, the
terminals the connector.
(2) Turn the ignition
the following output voltage.
of
B e t w e e n
a n d ( 3 ) .
Standard value: 2.4-2.6
(3) With the special tool still connected, secure t he G-sensor
so that the FRONT mark on the sensor mounting surfa ce
is facing straight down, take a reading of the
following output
Between terminals (2) and (3)
Standard value:
(4)If the voltage outside the standard value; after checking
to be sure that there is no abnormality in the powe r supply
-and earth, wires, replace the G-sensor.
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STEERING Power Steerina
R e m o v a l s t e p s
7.Stay (L.H.)
6.Stay (R.H.)
Caution
9. Centermember assembly
10. Clamp
11. Gear box assembly12.Return tube
The fasteners marked l be temporarily tightened
before they are finally tightened once the total we ight of
the engine has been placed on the
body.
REMOVAL SERVICE POINTS
BRAKE FLUID RESERVOIR ASSEMBLY
REMOVAL
Disconnect the brake fluid level sensor connector a nd remove
the brake fluid reservoir assembly from the dash pa nel with
the hose still attached.
NOTE
Place the removed reservoir where it
will not be a hindrance
power steering gear box, and
REMOVAL
Disconnect the and remove the
compressor from the
the hose
attached.
NOTE
Place the removed A/C compressor in a place where i t will
not be a hindrance when removing and installing the brake
fluid reservoir assembly, and tie it with a cord.
Caution
Do not damage the joint between the NC hose and the
pipe.
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STEERING Power Steering Hoses Engine (Turbo) and Engine>
REMOVAL SERVICE
BRAKE FLUID RESERVOIR ASSEMBLY
REMOVAL
Disconnect the brake fluid level sensor connector and
the brake fluid reservoir assembly from the dash panel with
the hose still attached.
NOTE
Place the removed reservoir assembly in a place whe re it
will not be a hindrance when removing and installin g the
power steering gear box, and tie it with a cord.
CLUTCH FLUID RESERVOIR ASSEMBLY
REMOVAL
Remove the clutch fluid reservoir assembly from the dash
panel with the hose still attached.
NOTE
Place the removed reservoir assembly in a place whe re it
will not be a hindrance when removing and installin g the
power steering hoses, and tie it with a cord.
A/C COMPRESSOR REMOVAL
Disconnect the A/C compressor connector remove the
compressor from the compressor bracket with the hos e still
attached.
NOTE
Place the removed in a where it will not be a hindrance when
removing and installing the power steering hoses an d tie
it with a cord.
Caution
Do not damage the joint between the A/C hose and the
A/C pipe.
PRESSURE HOSE/SUCTION HOSE REMOVAL
Caution
Generator is below the oil pump, so cover the gener ator
with a shop towel before removing any of the hoses.
INSTALLATION SERVICE POINT
PRESSURE HOSE INSTALLATION
(1) Connect the pressure hose so that its slit part contacts
the oil pump’s guide bracket.
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BODY Convertible Top
ToolTool number and nameSupersessionApplication
General service tool Removal of center air Oranament remover
of
502
Scan tool (MUT-II) 502Simulated vehicle
signal checking
TROUBLESHOOTING
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptom
Operation does not take place when
the convertible top switch is set to
open and close when the convertible
top bypass switch is set to OFF.
Opening or closing with the convert- ible top switch is not possible.
Operation takes place when the
convertible top switch is set to openor close during travel. Probable cause
l
Convertible top switch is faulty
lConvertible top bypass switch is
faulty
l Convertible top control module
is faulty
l Broken wire in convertible top
switch power supply circuit
lConvertible top switch is faulty
l Convertible top control module
is faulty
lCheck according to Flow Chart
A (Refer to
lBroken wire in vehicle speed
sensor circuit
l Convertible control module is
faulty
Remedy ,
Check -according to A
(Refer to
.
Check Chart
(Refer to ,
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