1990 MITSUBISHI SPYDER brake light

6ABS
INSPECTION CHART FOR TROUBLE SYMPTOMS35201140074
Get an understanding of the trouble symptoms and check according to the inspection
Trouble symptom InspectionReference
p a g e
C o m m u n i c a t i o n w i t h s c a n C o m m u n i c a t i o n w i t h a l l s y s te m s i s n o t p o s s i b l e . 1
tool is not possible.
Communication with is not possible.2 __
When the ignition key is turned to “ON” (engine ABS warning light3
does not illuminate.
After the engine starts, the ABS warning light rema ins illuminated.
When the ignition key is turned to “START”, the ABS warning light 5
not illuminate.
After the ignition key is turned to “ON”, the ABS warning light blinks once, and6
when turned to “START”, it illuminates. When return ed to “ON”, the light flashes
once, and then switches off.
Faulty ABS operation Unequal braking power on both s ides7
Insufficient braking power
ABS operates under normal braking conditions
ABS operates before vehicle stops under normal
braking conditions
Large brake pedal vibration (Caution 2.)
Caution
1.if steering movements are made when driving at high speed, or when driving on road surfaces
with low frictional resistance, or when passing over bumps, the ABS may operate even though
sudden braking is not being applied. Because of thi s, when getting information from the customer,
check if the occurred driving under such conditions as these.
2.During ABS operation, changes in the feeling of the brake (vibration may occur or
may not be able to be depressed). Such changes are due to intermittent changes in hydraulic
pressure inside the brake line to prevent the from locking, and is considered normal.
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A B S
HYDRAULIC UNIT (HU) CHECK
Caution
35200170111
Turn the ignition switch off before connecting ordisconnecting the scan tool.
1.
up the vehicle and support the vehicle with rigid
racks placed at the specified jack-up points or pla ce the
wheels which are checked on the rollers of the brak ing
force tester.
Caution
1.The roller of the braking force tester and the tire
be dry during testing.
2.When testing the front brakes, apply the parking
brake, and when testing the rear brakes, stop the
front by chocking them.
2.Release the parking brake, and feel the drag force (drag
torque) on each road wheel.. __
When using the braking force tester, take a reading of’
the brake drag force.
3. Turn the ignition key to ‘the OFF position and
scan tool as shown in the diagram.
4.After checking that the shift lever or
lever is in neutral, start the engine.
NOTE
1.At this time, the ABS system will switch scan
tool mode -and the
warning light will
2.When the ABS has’ been interrupted by the -fail-saf e
function, the tool actuator testing cannot be
used.
5. Use the scan tool to force-drive the actuator.
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ABSOn-vehicle Service
Engine (Turbo)>When booster cables are used to start the engine when the
battery is completely
immediately driven without waiting for the battery to
itself to some extent, the engine may, making
driving difficult. 1’
This happens because ABS consumes. a great amount
current for its self-check function. The remedy is to either
allow the battery to recharge
or to remove the
fusible link for circuit, thus disabling the anti-lock brake
system.
The ABS warning light will illuminate, when link
(for
is removes.
After the battery has sufficiently charged, fusible
link (for
and restart the engine; then sure
the
warning light is not, illuminated.

HYDRAULIC UNIT
ABS Hydraulic .
.
REMOVAL AND
.
Operationl Brake Fluid Draining
l Splash Shield (L.H.) Removal
(Refer to GROUP 42
Fender.)
l Headlight Assembly (L.H.) Removal
(Refer to GROUP 54 -Headlight, Front Turn-SignalLight and Position Light Assembly.)
l Air Cleaner Assembly Removal Engine(Non-turbo)>l Engine Control Module (ECM) Removal Engine (Non-turbo)>l R e l a y B o x B r a c k e t R e m o v a l E n g i n e(Non-turbo)>
Power Steering Pipe, Pipe
Clamp: Engine.( T u r b o ) a n d . GROUP l ‘Power‘ Steering Oil Reservoir Bolts (Turbo) and (Refer’to GROUP Power Hoses.)
l R e l a y Installation (Non-turbo)>l Engine Control Module (ECM) Installation Engine (Non-turbo)>l Air Cleaner Assembly Installation Engine(Non-turbo)>l Power Steering Oil Reservoir Mounting Bolts
Removal Engine (Turbo) and (Refer to GROUP Power Steering Hoses.)
l Power Steering Pressure Pipe and Return Pipe
Clamp Mounting Bolts Removal
EngineTurbo)and Engine>
Refer to GROUP Power Steering Hoses.) l
Headlight Assembly (L.H.) Installation
(Refer to GROUP 54 Headlight, Front Light and Position Light Assembly.)
l Splash Shield (L.H.) Installation
(Refer to GROUP 42
Fender.)
l Brake Fluid Supplying
l Brake Lines Bleeding (Refer to
lHydraulic Unit (Refer to
Flared brake line nuts
Removal steps
1. Brake pipe connection2.Harness connector
3. Hydraulic unit assembly
4. Hydraulic unit 5. Hydraulic unit bracket
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I

CONTENTS
ABS-ECU. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31 SERVICE SPECIFICATIONS . . . . . . . . . . . . . . . . . 3
GENERAL INFORMATION2SPECIAL TOOLS. . . . . . . . . . . . . . . . . . . . . . . . . . .3. . . . . . . . . . . . . . . . . .
G-SENSOR2 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
ON-VEHICLE SERVICE . . . . . . . . . . . .
. . . . 21WHEEL SPEED . . . . . . . . . . . . . . . . . .
ABS Operation Check . . . . . . . . . . . . . . . . . . . . . . . 21
Refer to for the following items.
BRAKE PEDAL
FRONT DISC BRAKE
LUBRICANTS
REAR DISC BRAKE
REAR DRUM BRAKE SHOE
REAR DRUM BRAKE WHEEL CYLINDER
ON-VEHICLE SERVICE
Brake Booster Operating Test
Brake Drum Inside Diameter Check
with Rear Drum Brakes>
Brake Fluid Level Sensor Check
Brake Lining and Brake Drum
Contact Check
Brake Lining Thickness Check Brake Pedal Check and Adjustment
Check Valve Operation Check
Front Brake Disc Run-out Check
Brake
Front Check and
Front Check
Proportioning Valve Test
Rear Brake Check
Rear Brake Disc Run-out Correction
Rear Brake Disc Thickness Check
Rear Disc Brake Pad Check and Replacement
Stop Light Switch Check
Refer to GROUP for the following items.
H Y D R A U L I C U N I T
MASTER CYLINDER AND BRAKE BOOSTER
PROPORTIONING VALVE
ON-VEHICLE
,
Bleeding,

ABSTroubleshooting.
Code No. 22 Stop switch system
[Comment]The ABS-ECU outputs this diagnostic trouble code in the following cases.Stop light switch remains on for more than 15 minutes while the ABS is not function-ing.l The harness wire for the stop light switch may be o pen.
If the stop light operates normally, there is an op en circuit in the harness for the
stop light switch input circuit is broken or there is a malfunction in the ABS-ECU.
l Malfunction of stop light switch of harness or connector l Malfunction ‘of
,
Does the stop light illuminate and switch
off
Yes
(Refer to GROUPBrake pedal.)
OK
Stop light switch check (Refer to
GROUP On-vehicle Service.)
OK
Replace the light
l Disconnect the connector and mea-
sure at the harness side.
l Stop light switch ON
l
Voltage between terminal 29 and body
ground
OK Battery positive voltage
OK
Check the harness between dedicated
Check the following co l
OK
Repair
Check trouble symptom. Replace the ABS-ECU.
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ABS CHECK
A B S
1. When the ignition turned to ABS
warning light flashes 4 times during a to
then off.
2.When the ignition to the
warning light remains
3.When the ignition switch’ turned back to the the
ABS warning light times then
switched off. ,
4. If the illumination is other than the the
diagnostic trouble codes.
ABSIlluminated
light
Not illuminated
Ignition
switch
0 0 0 0 3 6 2 5
INSPECTION CHART FOR TROUBLE
Get an understanding the trouble symptoms and check according the procedure chart.
Trouble symptom
Communication with scan
tool is not possible.Inspection Reference’
procedure
page No.,
Communication with all systems is not possible.
Communication with ABS only is not possible.
When the ignition key is turned to “ON” (engine sto pped), the ABS warning light does
3not illuminate.
After the engine starts, the ABS warning light rema ins illuminated.
4
When the ignition key is turned to “START”, the ABS warning light does not5
illuminate.
After the ignition key is turned to “ON”, the waining light blinks once, and when6turned to “START”, it illuminates. When returned to “ON”, the light flashes once, and
then switches off.
Faulty ABS operation Unequal braking bower on both sides
. braking power
ABS operates under normal braking conditions
ABS operates before vehicle stops under normal braking conditions
Large brake pedal vibration (Caution 2.)
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Caution,
Turn the ignition switch off before
t h e
If the scan tool is disconnected while the ignition
switch
the diagnostic trouble codes will be memorized!
the warning’ light’ may
1. Jack up the vehicle and support: the vehicle with rigid;
racks at the specified jack-up place the
wheels which ‘are checked on. .therollers of the braking
force tester.
Caution
The roller of the braking force tester the
shouldbedry during
2. When parking!
the rear brakes, stop
them.,
2.Release the parking brake, and feel
torque) ‘each road wheel. .
using “the force tester, take “a
‘brake drag
Turn the ignition key to the
scan tool as the
lever is in neutral, start
1. At this time, the ABS
‘2.
mode and the
When the ABS has’
function, the scan tool actuator testing canbe
used.
5. Use the scan tool to force-drive the actuator.
6.Turn the wheel by check the change in
force when the brake is -depressed.
using the braking force tester, depress the brake
until braking force is at the following values,
and check to be sure that the braking force changes
to the brake drag force inspected in step 2 when the
actuator is force-driven.
Front wheel
Rear wheel
The result should be as shown in the following diagram.
7.If the result of inspection is abnormal, correct ac cording
to the “Diagnostic Table.”__ .
,
__
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