1989 MITSUBISHI GALANT lights

SERVICE BRAKES - Anti-lock Braking System Troubleshooting35-37
Connector terminal arrangement for
troubleshooting
[l I2 / 3 14 15 1617 16 I9[10~11~12(13~14~15(16~17[16j[lQ~20~21~22~23~24)25~26~27~28(29130~31~32~33~34~35~
Terminal arrangement shown on the
special tool connector
-.
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ABS-AWD
Caution
1. When carrying out inspection of the ABS-ECU ter-
minal voltage and resistance, the special tool
(MB991356) should be used.
2. Because the ABS-ECU connector terminal arrange- ment for troubleshooting is different from the termi-
nal arrangement shown on the special tool connec-
tor, when using the special tool for inspecting, take
the readings from the terminal numbers of the spe-
cial tool.
Example
ABS-ECU connector terminalTerminal number shown on
number for troubleshooting the special tool connector
181
CHECK, USING ON-BOARD DIAGNOSTIC
(1) With the ignition switch OFF, connect the adapter harness
and scan tool, turn the ignition ON and select the ABS sys-
tem. (The ABS warning light lights up, it goes into the scan
tool mode. In the scan tool mode, ABS does not func-
tion.)
If it does not go into the scan tool mode, check the ECU
power
circuit and the harness between the ECU and data
link connectors.
(2) Read the on-board diagnostic output codes from the ECU
memory.
(3) Cancel the diagnostic trouble codes once from memory. (Refer to
P.35-38.)
If the memory can not be canceled, the ECU is currently
detecting the trouble. If’it can be cleared, the trouble is
either temporary or appears only when driving.
(4) When the diagnostic trouble codes are cleared, or when
the ABS system goes into fail safe during another test drive
and diagnostic trouble codes are outputed, check accord-
ing to diagnostic trouble code check charts (E-l -E-7).

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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SERVICE BRAKES - Anti-lock Braking System Troubleshooting35-49
1 E-4 1 When diagnostic trouble code “22 STOP SW” is displayed
[Explanation]
The ABS ECU outputs this diagnostic trouble code
in the following cases.
lStop light switch may remain on for more than
15 minutes without the ABS functions.
lThe harness wire for the stop light switch maybe open.
[Hint]
If the stop light operates normal, the ABS harness
wire for the stop light switch input circuit to the ECU
is broken or there is a malfunction in the ABS ECU.
SUB FUSIBLELINK 0
WITH
AUTO-CRUISE CONTROL
SWITCH -G
_.ABSECU
F-l
14A0663
Do the stop lights light up - Noand go out normally?~ Check the stop light re-lated circuit and repairproblem spots.
Yes
connect the ABS EC
connector and inspect at
the harness side connec-
When the brake pedal isNoHarness wire betweenpressed forcefully, does thevoltage between connectorstop light switch and ABSECU is broken.terminal No. 29 and groundindicate battery voltage?
Yes
1
Repair harness.
1
Malfunction of ABS ECU Replace ABS ECU.I

35-70SERVICE BRAKES- Service Adjustment Procedures
I, ! I ! I4 IO II IIWhen turned manually :---;---i-.-l---L--.I 8 ! IaI 1 11 1 II ’I 1’ I I I;-;--1---:--‘---+---t---i ’I IL---)-.-i---+--.II ’ I I 1 , 1 ,I
--:--~---;---:---~--~--
POINTS IN WAVEFORM MEASUREMENT
3. Manually turning the wheel to be measured by
l/2 to 1
turn/second, measure the output voltage with a circuit
tester or oscilloscope. Output voltage: When measured with circuit tester: 70
mV or more
When measured with oscilloscope (max. voltage): 100
mV or more
Probable causes of low output voltage
0 Speed sensor pole piece-to-rotor clearance too large
l Faulty speed sensor
4. Then, in order to observe the output state of the wheel
speed sensors, shift into low gear
(AWD vehicle) and drive
the wheels, observe the output voltage waveform of each
wheel speed sensor with an oscilloscope.
In the case of the FWD vehicle, observe the waveform with
an oscilloscope; for the front wheels, shift into low gear and
drive the wheels; for the rear wheels, turn the wheels manually at a constant speed.
NOTE
1.Waveform may also be observed by actually driving the
vehicle.
2.The output voltage is low when the wheel speed is low
and increases as the wheel speed increases.
Symptom
Too small or zero waveform amplitude Probable causes
Faulty wheel speed sensor Remedy
Replace sensor
Incorrect pole piece-to-rotor clearanceAdjust clearance
Waveform amplitude fluctuates Axle hub eccentric or with large runoutReplace hub
excessively (this is no problem if
the minimum amplitude is 100 mVor more)
Noisy or disturbed waveformOpen circuit in sensor Replace
sensor
Open circuit in harness
Correct harness
Incorrectly mounted wheel speed sensorMount correctly
Rotor with missing or damaged teeth Replace rotor
NOTEThe wheel speed sensor cable moves following motion of the front or rear\
suspension. Therefore, it is likely that it
has anopen circuit only when driving on rough roads and it functions normally \
on ordinan/ roads. It is, therefore, recommended
to observe sensor output voltage waveform also under special conditions,\
such as rough road dnvlng.
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INSPECTION OF HYDRAULIC UNIT
INSPECTION BY FEEL
(1) Jack up the vehicle and support the vehicle with rigid racks
placed at the specified jack-up points.
(2) Release the parking brake and determine the drag force(drag torque) of each wheel by feel.
(3) Set the scan tool through the adapter harness
(MB991 377)
as illustrated.
(4) After confirming that the shift lever or selector lever is in the neutral position, start the engine.
The ABS warning light lights up, it goes into the scan tool mode. In the scan tool mode, ABS does not function.
I

35-72SERVICE BRAKES - Service Adjustment Procedures
14AO701 1
INSPECTION BY USING BRAKE FORCE TESTER
NOTE
(1) The brake force tester roller and tire must be dry during thetest.
(2) When testing the front brakes, apply the parking brake and when testing the rear brakes, apply chocks to the front
wheels to lock them.
(1) Place the front or rear wheels on the brake force tester
(2) &(%:he
scan tool through the adapter harness (MB991377)
as illustrated.
(3) After confirming that the shift lever or selector lever is in
the neutral position, start the engine.(The ABS warning light lights up, it goes into the scan tool
mode. In the scan tool mode, ABS does not function.)
(4) Operate the brake force tester roller.
(5) Depress the brake pedal until the brake force tester
indicates the following value and keep the brake force at
this level during the test.
Front wheels: 800- 1 ,OOON (176 - 220 Ibs.)
Rear wheels: 600
- 800N (132 - 176 Ibs.)
(6) Allow the brake tester indication to stabilize before operat-
ing the scan tool to perform actuator test (Item
No.01, 02,
03). Then, read change of tester indication. Referring to the following “Judgement in Inspection by
Using Brake Force Tester” table, judge and take corrective
action if necessary.
NOTE
While the ABS is in the fail safe mode, the scan tOOf actua-
tor test cannot be made.
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4ALPHABETICAL INDEX
DOHC-Turbo.................................
. 15-31-f
SOHC-8VALVE..................................

.
15-27-t
SOHC-1 GVALVE............................

.
15-28-l
EXHAUST PIPEDOH

C
......................... 15-33-I
SOHC.....................................

.
15-32-l
EXHAUST SYSTEM, Maintenance ..................... 00-45-I
F
FAN MOTOR
Condenser
.............................
.
55-48-l
Radiator...................

.
......... 14-12-I
FEEDER CABLE ..........................
54-l 55-11FENDER................................
.
42-61-t
FILLER DOOR, Fuel Tank.........................

.
42-60-I
FILLER TUBE CAP, Fuel Tank, Inspection...............

.
17-21 -I
FILTER
Engine 011. Maintenance ....................
. 00-41-I
Fuel ........................... 13-327-l
Fuel
....
.
...................
13-I 15-lFuel ........................
.
13-195
FITTINGS, Handling................................
. 55-22-l
FIXED SAS
Adjustment
........................
.
13-250-I
Adjustment
...................
.
13-138-I
FLAT BATTERY, Remedy............................

.
35-75-l
FLOOR CONSOLE................................

.
52-29-l
FLUID
Power Steering, Level Check
...................
. 37A-21-l
Power Steering, Replacement ................. 37A-21-l
Transaxle, Replacement ..................... 23-82-l
FLUID LEVEL, Transaxle, Inspection .................. 23-82-l
FOG LIGHT................

.
......................
54-94-11FOG LIGHT SWITCH................................
.
54-99-114WS, Function Check
..........................
. 37B-6-l
FRONT BRAKE DISC
Run-out Check
...................................
. 35-63-I
Run-out Correction ........................... 35-64-l
Thickness Check .............................. 35-65-l
FRONT DISC BRAKE.................................

. 35-94-l
FRONT DISC BRAKE PAD, Check and Replacement ......... 35-59-l
FRONT DOOR DRIP LINE WEATHERSTRIP 42-112-I
FRONT DOOR GLASS...............................

. 42-80-l
FRONT DOOR HANDLE.........................

. 42-96-l
FRONT DOOR LATCH...

.
......... .......... 42-96-l
FRONT DOOR
MOULDING
........................... 42-112-I
FRONT DOOR REGULATOR........................

. 42-80-I
FRONT DOOR TRIM.................................

. 42-76-l
FRONT DOOR WATERPROOF FILM....................

. 42-76-l
FRONT GRILLE..................................

. 51-12-l
FRONT SEAT,...................................

. 52-35-l
FRONT WHEEL ALIGNMENT Adjustment
.....................
. 338-86-I
Adjustment .................... 33A-5-l
FUEL FILTER
DOHC
.......................................
. 13-327-I
SOHC-8VALVE
.................................
13-l 15-l SOHC-IGVALVE
................................ 13-195-I
FUEL HOSES, Maintenance ............................
00-39-1
FUEL LINE
DOHC-AWD ..................................
.
13-326-l
DOHC-FWD....................................

.
13-324-l
SOHC-8VALVE
................................. 13-113-l
SOHC-1 ~VALVE............................

.
13-l 95-IFUEL PRESSURE
On-vehicle Inspection
On-vehicle Inspection

On-vehicle Inspection
FUEL PRESSURE SOLENOID ,
On-vehicle Inspection >
FUEL PUMP
On-vehicle Inspection
On-vehicle Inspection

On-vehicle Inspection
FUEL SYSTEM, Maintenanc

e
FUEL TANK
DOHC-AWD .,.......
DOHC-FW

D
SOHC-8VALVE
SOHC-16VALVE
FUEL TANK FILLER DOO

R
FUEL TANK FILLER TUBE CAP, Inspection
FUEL TANK PRESSURE CONTROL VALVE. 13-312-l
13-102-I
,.....13-I
92-l
13-307-I
......
13-258-l
....... 13-46-l
...... 13-147-l
....... 00-39-l
......
13-322-l
...... 13-318-l
..... 13-109-I
...... 13-195-I
....... 42-60-I
....... 17-21-I
....... 17-21-l
G
GARNISHES
51-13-l
GASKET
Cylinder Head 1 l-73-l
Cylinder Head 1 l-25-l
GAUGE UNIT, Engine Coolant Temperature
14-31-l
GEAR BOX, Power Steering 37A-32-l
GEAR OIL, Level Check
27-15-l
GENERATOR
16-g-11
GLASS
Door, Adjustmen
t
42-52-l
Door, Front 42-80-I
Door, Rear 42-83-l
Quarter Window 42-70-I
Window.............
.._......_...... 42-63-i
Window,Rear
42-72-i
GRILLE,Front
_. _. _.
51-12-l
G-SENSOR
Service Brakes
35-132-l
Output Voltage, Check 336-96-l
H
HANDLE
Door, Front
..........................
.
Door,Rear
...........................
Door Inside, Play Check. ..................
HAZARD SWITCH.........................
.
HEADLIGHTS............................

.
HEADLINING.............................

.
HEATED OXYGEN SENSOR, On-vehicle Inspection
>
...............................
HEATER CONTROL.......................
.
HEATER UNIT............................

.
HEIGHT SENSOR.........................

.
HIGH MOUNTED STOP LIGHT...............

.
42-96-1 42-99-l
42-52-l
54-98-11
54-92-11
52-31-l
13-290-I
55-25-l
55-30-I
338-l
35-l
54-96-11HIGH PRESSURE SWITCH (HIGH-PRESSURE TANK SIDE),Actuation Pressure Check. 338-94-I
16-42-11
42-55-l
42-50-I
54-l 03-11
54-105-11
HIGH TENSION CABLE, Spark Test
HOOD .__...._..._......__._...................
HOOD, Alignment Adjustment .
HOR

N
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . \
. . . HORNRELAY

._.._._....___.........__.._._..___
HOSE
Brake, Maintenance
.
00-45-I