check engine light MITSUBISHI GALANT 1989 Service Manual PDF

35-22SERVICE BRAKES- Anti-lock Braking System Troubleshooting
- N

o
With the ignition key in the “ON” posi-
Check fuse No. 9. If it is
tion. do other warning lights illuminate?
* blown, correct the cause of
the blown fuse and thenreplace the fuse.
I
Yes
Turn the ignition switch OFF and check.
4II., III,
Is the ABS warning light normal? (CheckNo cABS warning light bulb Replace ABS warning
for burned bulb.)burned.* light bulb.
I
Yes
NoThe harness between the
combination meter from
* fuse No. 9 is broken.
1
Repair harness.I
Circuit in combination metercRepair or replace com-
is broken. bination meter.
Yes
Is there continuity between terminals No.NoMalfunction of combination Repair or replace combi-
;,d”,l” No. 17 on the combination meter -meter
nation meter
Yes
Are instrument panel wiring harness, _
Noc Connect connectors firmly.
engine compartment wiring harness,
body wiring harness and ABS wiring
harness connectors connected properly? (Check for pins pulled out or
bent, repair as needed.)
Yes
Broken wire in ECU, valve relay or both
drive circuits. Check and repair both
circuits.
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35-24
SERVICE BRAKES - Anti-lock Braking System Troubleshooting
B ABS warning light illuminated after the engine is started and remains o\
n.
[Explanation]
This is the symptom when the ABS ECU does not
power up due to broken ECU power circuit, etc.,
when the fail safe function operates and isolates the
system or when the warning light drive circuit is
short circuited.
[Hint]
Check the on-board diagnostic output and if there is
no output voltage or if the scan tool and ABS ECU
cannot communicate, there is a good possibilit
y
that power is not flowing to the ECU.
Caution
l If there is no output of diagnostic trouble
codes, there is a good possibility that the
fail safe is functioning.
J/B
IGNITION
%FH
z
&7
i
CD10A
728
Is there on-board diagnostic No )output? (Is there communi-cation with scan tool?) CONTINUE TONEXT PAGE
Yes
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Does the ABS warning light
remain illuminated
even
with the ECU connector dis-
connected?
YesNoShort in ECU transistor
1 Replace ECU.I

35-34SERVICE BRAKES - Anti-lock Braking System Troubleshooting
TROUBLESHOOTING (ABS-AWD)
Confirm condition in the following way and diagnose accordingly.
c
P
t:
1
-)oes
the ABS warning light illuminate as described
elow up to the time the engine starts?
1) When the ignition key is turned to the “ON”
position, the ABS warning light blinks four times
for approximately
1 second due to the ABS ECU
(as a self check of the valve relays is performed),
and goes out and stays out.
2) W
ith the ignition key in the “START” position,
power to the ABS ECU is interrupted and the ABS warning light remains lit because the valve
relay is OFF.
(3) When the ignition key is turned from the “START’ position to the “ON” position, the ABS warning
light blinks four times for approximately
1
second (during this time a recheck of the valve
relays is performed), and then goes out and
stays out.
,,,\~~\l’l”“F’,r//,,,l/,,
a+’4 4 5r’o, (j /z$$+3,,,,%&73,
:
f=&L-gy
82
1cJz
x 1000
rimonUILEAED nxL GNL”Oyg@O@~ 2F
ABS
warnmg’l~ght66A0093
ABS warning
lightONI
OFF
Ignitionkey
ACC, LOCK
114AO594
YesCONTINUE TO NEXT PAGENo
1
No.Trouble condition
ABS warning light does not light up at all.
1
ABSwarning
light
Ignition
keyACC, ON
OFFLOCK 1
I
When the lgnltlon
key IS turned to the
“ON” position, it remains lighted.
ABS warnina
ON , l Short in ECU warning light drive circuit
l Malfunction of ECU
-“l-l- -III
ignitionkey
ACC. LO!?-14AO591
Major causes
l ABS warning light bulb is burnt out.
l Open in ABS warning light electrical circuit (check for blown fuse)
l Fail safe is functioning due to ECU on-
board diagnostic
Does not illuminate when ignition key is
in “START” position. l Malfunction of valve relay
l Break in harness between ABS warn-
ing light and HU
l Break in harness between HU and
14AO595
Remedy
Check, using flow
chart A (Refer to
P.35-39.)
Check, using flow
chart B (Refer toP.35-42.)
1 2 /light
-
Check, using flow
chart C (Refer to
P.35-44.)
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SERVICE BRAKES - Anti-lock Braking System Troubleshooting
W
ith the ignition key in the “ON” posi- No
Check fuse No. 9. If it is
tion, do other warning lights illuminate? blown, correct the cause of
-T-
Yesthe blown fuse and then
replace the fuse.I
Remove the combination
meter, and check with
the ignition key “ON”.
I
Does voltage between har-NoThe harness between the ness
connector terminal
No. 8 and ground indicate
-combination meter from
fuse No. 9 is broken.
battery voltage?
I
Yes Repair harness.
Circuit in combination meter
is broken.
L Repair or replace com-
bination meter.
Turn the ignition switch OFF an
check.
I
Is the ABS warning light normal? (CheckNo
for burned bulb.)c A$Eedyrning light bulb
,
c Replace ABS warning
light bulb.
Yes
Is there continuity between terminals No. No -
8 and 4” or 17’2 on the combinationI Malfunction of combinatio
n
meter
I Repair or replace combi-
meter side? nation meter
Are instrument panel wiring harness, No
-~
engine compartment wiring harness, . Connect connectors firmly.
body wiring harness and ABS wiring
(Check for pins pulled out or
harness connectors connected properly? bent, repair as needed.)
I
1 Yes
I
Broken wire in ECU, valve relay or both
drive circuits. Check and repair both
circuits.
I
NOTE‘1: Non-Turbo . Turbol *:Non-Turbo
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35-42
SERVICE BRAKES - Anti-lock Braking System Troubleshooting
BABS warning light illuminated after the engine is started and remains on\
.
[Explanation]
This is the symptom when the ABS ECU does not
power up due to broken ECU power circuit, etc.,
when the fail safe function operates and isolates the
system or when the warning light drive circuit is
short circuited.
[Hint]
Check the on-board diagnostic output and if there is
no output voltage or if the scan tool and ABS ECU
cannot communicate, there is a good possibility
that power is not flowing to the ECU.
Caution
l
If there is no output of diagnostic trouble
codes, there is a good possibility that the
fail safe is functioning.
MAINFUSIBLELINK @
IGNITION
SWITCH
(IG1)
ILOIE;NATION
+10
3
@izJ”,HUZ8 p:r12 /e-,
xx
I
I
I*I
; 16 4=
9
II
d
+qfimamq!2 a
I -LQ-7 ABS ECUm1
: Non-Turbo . Turbo: Non-Turbo Is there on-board diagnosticNocCONTINUE TO
output? (Is there communi- NEXT PAGE
cation with scan tool?)
I
Yes
Does diagnostic troublecode output display normalcodes?
No . Check, using the diagnos-tic trouble code checkchart. (Refer to P.35-38.)IIILI
Short in harness betweenrgl;r ECU and ABS warning) Repair harness or replacecombination meter.
II
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SERVICE BRAKES - Service Adjustment Procedures35-53
switch
switch
c/ 14F516
Pedal
Idown /
\ \
F14517
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F14518
SERVICE ADJUSTMENT PROCEDURES
BRAKE PEDAL INSPECTION AND ADJUSTMAN-
1.Measure the brake pedal height as illustrated. If the brake
pedal height is not within the standard value, adjust as
follows.
Standard value (A): 176-181 mm (6.9-7.1 in.)
(1) Disconnect the stop light switch connector, loosen the
lock nut, and move the stop light switch to a position
where it does not contact the brake pedal arm.
(2) Adjust the brake pedal height by turning the operating
rod with pliers (with the operating rod lock nut
loosened), until the correct brake pedal height is
obtained.
(3) After screwing in the stop light switch until it contactsthe brake pedal stopper (just before the brake pedal is
caused to move), return the stop light switch l/2
to 1
turn and secure by tightening the lock nut.
2.
(4) Connect the connector of the stop light switch.
(5) Check to be sure that the stop light is not illuminated
with the brake pedal unpressed.
Reference value
(B): 0.5-1.0 mm (.02-.04 in.)
With the engine stopped, depress the brake pedal two or
three times. After eliminating the vacuum in the power
brake booster, press the pedal down by hand, and confirm
that the amount of movement before resistance is met
(the free play) is within the standard value range.
Standard value
(C): 3-8 mm (.l-.3 in.)
If the free play is less than the standard value, confirm that
the clearance between the stop light switch and brake pedal is within the standard value.
If the free play exceeds the standard value, it is probably
due to excessive play between the clevis pin and brake
pedal arm. Check for excessive clearance and replace
faulty parts as required.

35-54SERVICE BRAKES - Service Adjustment Procedures
F14519
14UOO61
When engine isstopped
No good
0
w
\/‘14UOO62z;redengine
is
14UOO60 ,3.
Start the engine, depress the brake pedal with approxi-
mately 500 N (110 Ibs.) of force, and measure the clearance
between the brake pedal and the floorboard.
Standard value(D): 80 mm (3.1 in.) or more
If the clearance is less than the standard value, check for
air trapped in the brake line and for brake fluid leaks. If
necessary, check the brake system mechanism (excessive
shoe clearance due to faulty auto adjuster) and repair
faulty parts as required.
models>
4. After adjusting the height of the brake pedal, inspect the shift lock device.
5. If there is any trouble in the functioning of the shift lock device, adjust the shift lock cable.
NOTE
Refer to GROUP 23 for details about inspection and
adjustment of the shift lock device.
BRAKE FLUID LEVEL SENSOR CHECKM35F6A6
(1) Connect a circuit tester to the brake fluid level sensor.
(2) Move the float from top to bottom and check for
continuity.
(3) The brake fluid level sensor is in good condition if there is
no continuity when the float surface is above “A”, and if
there is continuity when the float surface is below “A”.
BRAKE BOOSTER OPERATING INSPECTION MlKcAJ
For simple checking of brake booster operation, carry out the
following tests.
(1) Run the engine for one or two minutes, and then stop it.
(2) Step on the brake pedal several’ times with normal
pressure.
If the pedal depressed fully the first time but gradually
becomes higher when depressed succeeding times, the
booster is operating properly.
If the pedal height remains unchanged, the booster is
faulty.
(3) With the engine stopped, step on the brake pedal several
(4
If
times with the same foot pressure to make sure that the
pedal height will not change.
Then step on the brake pedal and start the engine.
If the pedal moves downward slightly, the booster is in
good condit’on. If there is no change, the booster is faulty.
.) With the engine running, step on the brake pedal and then
stop the engine.
Hold the pedal depressed for 30 seconds. If the pedal
height does not change, the booster is in good condition.
If the pedal rises, the booster is faulty.
the above three tests are okay, the booster performance
can be determined as gooa.
If one of the above three tests is not okay at last, the check
valve, vacuum hose, or booster will be faulty.
CHECK VALVE OPERATION CHECKM3!3FNAK
cl989 models>
1. Remove the vacuum hose at the brake booster side.
2. Remove the check valve from the brake booster.
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35-68SERVICE BRAKES - Service Adjustment Procedures
A.B.S. warning light
Ignition switch
sT;!i;%
lARD175
Filter4
kR
14A0171
ANTI-LOCK BRAKING SYSTEM (A.B.S.) CHECK
(CHECKING BY THE A.B.S. WARNING LIGHT)
M35FOAK
By following the procedures described below, check whether
the system is good or not by checking the illumination and non-illumination of the A.B.S. warning light.
(1) Check to be sure that the A.B.S. warning light illuminates
when the ignition key is turned to the ON position, and
that it again illuminates two times during a short period of
time (approximately 0.5 second) after the engine is started, and that it then stops illumination.
(2) After checking that the A.B.S. warning light does not illuminate during a period of approximately 2 minutes
while the engine is left idling, test drive at a vehicle
speed of approximately 30 km/h (18.6 mph) or more for
about 30 seconds or longer and check that the A.B.S.
warning light does not illuminate during that time.
(3) If any abnormal condition is discovered during steps (1) and (2) above, check the system by following the anti-
skid brake system troubleshooting procedures.
Caution
Before checking the anti-lock braking system by the
A.B.S. warning light as described above, first check
the ordinary brake system that there are no problems
such as leakage of the brake fluid, incorrect connec-
tions of the brake tubes, etc.
WHEEL SPEED SENSOR OUTPUT VOLTAGE
CHECK
M3sFoAE
(1) Jack up the vehicle and release the parking brake.
(2) Disconnect the electronic control unit harness connector,
and measure the speed sensor output voltage at the
vehicle side harness connector.
(3) Rotate the wheel to be measured at a speed of about
one-
half to one rotation per second and while doing S
O
measure the speed sensor output voltage by using a
voltmeter or oscilloscope.
(4) If an oscilloscope is used, use the filter shown in the
figure at the left.
Speed sensor1-1 Standard value
1 Front left15-4 (22-4 I50 mV or more 1IIIII
IFront rightI1 23-21 1 23-21 1IIIII1 Rear right1 24-26 1 24-26 1II IIIIII Rear left( 7-9 18-9 1IIII1
NOTE
1. A voltmeter with AC mV range indication should be used
for measurement.
2. When disconnecting the adaptor from the body harness connector, attach a cord to the male connector and then
pull to disconnect.
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SERVICE BRAKES -Service Adjustment Procedures35-75
14AO197
FLAT BATTERY REMEDYM35FOAF
When booster cables are used to start the engine when the
battery is completely flat and then the vehicle is immediately
driven without waiting for the battery to recharge itself to
some extent, the engine may misfire, and driving might not be
possible. This happens because A.B.S. consumes a great
amount of current for its self-check function; the remedy is to
either allow the battery to recharge sufficiently, or to remove
the fuse for A.B.S. circuit, thus disabling A.B.S.
The A.B.S. warning light will illuminate when the main fusible
link (for A.B.S.) is removed.
After the battery has sufficiently charged, install the main
fusible link (for A.B.S.) and restart the engine; then check to be
sure the A.B.S. warning light is not illuminated.
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BRAKE FLUID PRESSURE SWITCH CHECK
hl35FOAL
(1) Disconnect the hydraulic pressure switch connector.
(2) Check the continuity between the terminals of hydraulic pressure switch.
Condition Between terminals
Brake pedal not depressed
No conductance
Brake pedal depressed lightlyNo conductance
Brake pedal depressed
stronglyConductance

ALPHABETICAL INDEX1
A
ABS
Checking by the ABS Warnrng Light................
. 35-68-l
Troubleshooting ...........................
35-l 5-l
ABS POWER RELAY, Chec
k 35-74-l
ACCELERATOR CABLE
Inspection and Adjustment
13-398-l
Inspection and Adjustment ........ 13-329-l
ACCELERATOR SWITCH, Inspection and Adjustment 13-329-I
A/C COMPRESSOR CLUTCH RELAY
On-vehicle Inspection
.............
. 13-285-l
On-vehrcle
Inspection
.........
. 13-83-t
On-vehicle Inspection
......
. 13-176-l
ACTIVE-ECS ON-BOARD DIAGNOSTIC, Check......

. 338-88-I
ACTIVE-ECS RELAY.......................

. 338-141
-I
ACTIVE-ECS SENSOR....

.
...... ............ 338-138-I
ACTIVE-ECS SYSTEM
Checking by Using Alarm Light
.................
. 338-87-I
Operation Check ........................... 338-90-I
AERO PARTS..

.
........................... 51-18-l
AIR CLEANER...............................

. 15-9-I
AIR CLEANER ELEMENT
Inspection and Replacement
....................
. 15-6-l
Maintenance .......................... 00-39-l
AIR COMPRESSOR..........................

. 338-125-I
AIR CONDITIONING SWITCH
Emission control
...........................
.
17-21 -I
Heater, Air
Conditionrng
and Ventilation .............. 55-29-l
On-vehicle Inspection ................. 13-285-l
On-vehicle Inspection
...........
. 13-83-l
On-vehicle Inspection

..........
. 13-176-l
AIR TUBE..............

.
....................... 338-133-I
ALARM LIGHT, Check. ......................... 338-87-I
ALARM SYSTEM, Theft ..........................
54-165-11
ALIGNMENT
Front Wheel, Adjustment .......................
. 33A-5-l
Rear
Wheel, inspection ..................
. 34-23-l
Rear Wheel, Inspection
....................
. 34-5-l
ANTENNA ......................................
54-153-11
ANTI-LOCK BRAKING SYSTEM, Troubleshooting .........
.
35-15-1
ARM
Lower
......................
. 338-103-I
Lower Suspension>......................
.
33A-10-I
Lower
................... 34-28-l
Torsion
................
.
338-l 19-l
Torsion Suspension-FWD>
...................34-l 5-lTrailing
................. 34-31-l
Upper
.................. 34-28-l
AUDIO
SYSTEM................

.
.................
54-l 12-11
AUTO-CRUISE CONTROL. ..........................
. 13-408-I
AUTO-CRUISE CONTROL INDIVIDUAL PARTS, inspection..

. 13-401-I
AUTO-CRUISE CONTROL SYSTEM...................

. 13-332-l
AUTO-CRUISE CONTROL SYSTEM, Inspection..........

. 13-397-l
AUTOMATIC TRANSAXLE, Maintenance ................. 00-43-I
AXLE
Rear, Maintenance
...............................
. 00-45-I
Torsion
........................
.
338-l 19-l
Torsion .....

.
......................... 34-15-l
AXLE HUB
Rear
Disc Brakes> ...................... 27-8-l
Rear CFWD-Rear
Drum Brakes> ................... 27-6-l
AXLE SHAFT ..............................

.
27-17-1
B
BACKLASH. Total, Rear Axle, Check ............
. 27-15-l
BALL JOINT
Rotation Starting Torque Check ...................... 378-8-I
Tie Rod End, Staning Torque Check .................. 37A-15-l
Tie Rod End, Variation Check ....................... 37A-15-l
BALL JOINT SEALS, Maintenance ..................... 00-45-I
BAR
Stabilizer ....................

. 338-106-I
Stabilizer
...................
. 33A-13-l
Stabilizer Suspension-AWD>...............
. 34-37-l
BAROMETRIC PRESSURE SENSOR
On-vehicle Inspection
................
. 13-266-l
On-vehicle Inspection
13-53-l
On-vehicle Inspection
..........
. 13-154-l
BASIC IDLE SPEED
Adjustment
...........................
. 13-245-l
Adjustment
..................... 13-33-l
Adjustment
...................
. 13-133-l
BATTERY.........................................

.
54-2-11
BATTERY, Flat Remedy.
.............................
. 35-75-l
BEARING
Wheel, Adjustment ................

. 338-87-I
Wheel, Adjustment ............. 33A-5-l
BELT
Drive, Compressor, Adjustment
....................
. 55-17-l
Drive (For Water Pump and Generator), Maintenance ..... 00-41-I
Drive, Tension Adjustment ................. 11-61-I
Drive, Tension Adjustment ................. 11-12-l
Seat..........................................

. 52-39-l
Timing ...................... ......... 11-80-I
Timing................................

. 11-34-l
Timing, Maintenance ............................... 00-40-I
Timing, Tension Adjustment ................ 11-10-I
BLEEDING
Clutch
..........................................
. 21-6-l
4ws...........................................

. 370-4-I
Service Brakes. .................................. 35-57-l
Steering ........................................ 37A-22-l
BLOWER..........................................

. 55-32-l
BOOSTER
Brake
.........................................
. 35-85-l
Brake, Operating Inspection ......................... 35-54-l
BOOST METER, On-vehicle Inspection ... 13-311-l
BOOTS, Drive Shaft, Maintenance ....................... 00-45-I
BRAKE
Disc, Front
......................................
. 35-94-l
Disc, Rear.....................................

.
35-l 14-l
BRAKE BOOSTER
...................................
. 35-85-l
BRAKE BOOSTER, Operating Inspection .................. 35-54-l
BRAKE DISC
Front, Run-out Check.
.............................
. 35-63-l
Front, Run-out Correction ........................... 35-64-l
Front, Thickness Check ............................. 35-65-l
Rear, Run-out Check ............................... 35-66-l
Rear, Run-out Correction. ........................... 35-66-l
Rear, Thickness Check............................

. 35-66-l
BRAKE DRUM, tnside
Diameter, Check ................... 35-67-l
BRAKE FLUID LEVEL SENSOR, Check...................

. 35-54-l
BRAKE FLUID PRESSURE SWITCH
AWD-ABS (Up to 1991 Models)
....................
.
35-133-l
AWD-ABS
(Up to 1991 models), Check ...............
. 35-75-l
BRAKE HOSES, Maintenance ........................... 06-45-t
BRAKELINE
........................................
35-87-l