MITSUBISHI TRITON 1997 Workshop Manual

G
re ase: R ep air k it g re ase 2
5
642 3
1 3 4

35B-2
Bleeding 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Fluid Level Sensor Check
Refer to GROUP 35A . . . . . . . . . . . . . . . . . . . . . . . . . .
Load Sensing Spring Length Check and
Adjustment Refer to GROUP 35A. . . . . . . . . . . . . . .
Load Sensing Proportioning Valve Function
Test Refer to GROUP 35A. . . . . . . . . . . . . . . . . . . . .
Disc Brake Pad Check and Replacement 23. . . . .
Front Disc Brake Rotor Check
Refer to GROUP 35A . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Lining Thickness Check
Refer to GROUP 35A . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Drum Inside Diameter Check
Refer to GROUP 35A . . . . . . . . . . . . . . . . . . . . . . . . . .
Brake Lining and Brake Drum Connection Check
Refer to GROUP 35A . . . . . . . . . . . . . . . . . . . . . . . . . .
Wheel Speed Sensor Output Voltage Check
24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Unit Check 26. . . . . . . . . . . . . . . . . . . . . . . .
Solenoid Valve Check 27. . . . . . . . . . . . . . . . . . . . . . .
Motor Operation Check 27. . . . . . . . . . . . . . . . . . . . . . Motor Relay and Valve Relay Continuity
Check 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remedy for a Flat Battery 28. . . . . . . . . . . . . . . . . . .
BRAKE PEDAL Refer to GROUP 35A. . . . . . . .
MASTER CYLINDER AND BRAKE
BOOSTER 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LOAD SENSING PROPORTIONING VALVE
Refer to GROUP 35A . . . . . . . . . . . . . . . . . . . . . . . .
FRONT DISC BRAKE 32. . . . . . . . . . . . . . . . . . . . .
REAR DRUM BRAKE
Refer to GROUP 35A . . . . . . . . . . . . . . . . . . . . . . . .
HYDRAULIC UNIT 37. . . . . . . . . . . . . . . . . . . . . . . . .
WHEEL SPEED SENSOR 39. . . . . . . . . . . . . . . . . .
ABS-ECU 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

G
EN ER AL IN FO RM ATIO N 35200010123
T he A BS c o nsis ts o f w heel s p eed s e nso rs , s to p
l a m p s w it c h h yd ra ulic u nit a nd th e A BS-E C U. If
a p ro ble m o ccu rs in th e s yste m , th e m alf u nctio nin g
s yste m c a n b e id entif ie d b y m eans o f th e d ia gnosis
f u nctio n, a nd th e tr o uble s ym pto m m em ory w ill n ot
b e e ra se d e ve n if th e ig nit io n s w it c h is tu rn ed to O
FF. ( H ow eve r, it w ill b e e ra se d if th e b atte ry is
d is co nnecte d.)
I n a ddit io n, r e adin g o f d ia gnosis c o des a nd d ata
l is t a nd a ctu ato r te stin g a re p ossib le u sin g th e
M UT-II .
I te m s S
pecif ic a tio ns S
peed s e nso r M
agnet c o il ty p e F
ro nt r o to r te eth 4
7 R
ear r o to r te eth 4
7

S
ER VIC E S PEC IF IC ATIO NS 35200030136
I te m s S
ta ndard v a lu e L
im it B
ooste r p ush r o d to m aste r c ylin der p is to n c le ara nce m m D
ie se l- p ow ere d v e hic le s 0
.7 0 ± 1 .1 0 ±
P
etr o l- p ow ere d v e hic le s 0
.9 0 ± 1 .3 0 ±
F
ro nt d is c b ra ke p ad th ic kn ess m m 1
0 2
.0 H
yd ra ulic u nit s o le noid v a lv e in te rn al r e sis ta nce W 2
.2 ±
I
N 5
.0 ±
S e
ed se nso r s
in te rn alre sis ta nce kW 1
4 ±
S
eed s
e nso r s i
n te rn al r
e sis ta nce k
W 2 1 4 ±
S
peed s e nso r in su la tio n r e sis ta nce k W ±
S
pecif ie d lu bric a nt B
ra ke flu id D
O T3 o r D O T4 B
ra ke p is to n s e al R
epair k it g re ase G
uid e p in b oot in ner s u rfa ce s L
ock p in b oot in ner s u rfa ce s P
is to n b oot m ountin g g ro ove s B
ra ke p is to n b oot in ner s u rfa ce s L
ock p in b ush in ner s u rfa ce s P
is to n c u p s u rfa ce S
pecif ie d s e ala nt R
em ark s V
acu um s w it c h 3
M A T D P art N o. 8 661 o r e quiv a le nt S
em i- d ry in g s e ala nt N
um ber N
am e U
se M
B991502 M
UT-II s u b
a sse m bly F
or c h eckin g o f A BS ( D ia gnosis c o de d is p la y
w hen u sin g th e M UT-I I ) M
B991529 D
ia gnosis c o de
c h eck h arn ess F
or c h eckin g o f A BS ( D ia gnosis c o de d is p la y
w hen u sin g th e A BS w arn in g la m p) M
B990964
M B990520 B
ra ke to ol s e t P
ush in g-in o f th e d is c b ra ke p is to n

ABS <2WD> ± Troubleshooting35B-5
TROUBLESHOOTING35201110143
STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING
Refer to GROUP 00 ± How to Use Troubleshooting/Inspection Service Points.
NOTES WITH REGARD TO DIAGNOSIS
The phenomena listed in the following table are not abnormal.
PhenomenonExplanation of phenomenon
System check soundWhen starting the engine, a thudding sound can sometimes be heard coming from inside
the engine compartment, but this is because the system operation check is being
performed, and is not an abnormality.
ABS operation sound1. Sound of the motor inside the ABS hydraulic unit operation. (whine)
2. Sound is the generated along with vibration of the brake pedal. (scraping)
3. When ABS operates, sound is generated from the vehicle chassis due to repeated
brake application and release.
(Thump: suspension; squeak: tyres)
ABS operation
(Long braking distance)For road surfaces such as snow-covered roads and gravel roads, the braking distance for
vehicles with ABS can sometimes be longer than that for other vehicles. Accordingly, advise
the customer to drive safely on such roads by lowering the vehicle speed and not being too
overconfident.
Shock during system
operation checkShock may be felt when the brake pedal is depressed slightly at a low driving speed. This
occurs due to ABS operation check (initial check at a vehicle speed of 8 km/h), and does
not indicate any malfunction.
Diagnosis detection condition can vary depending on the diagnosis code.
Make sure that checking requirements listed in the ªCommentº are satisfied when checking the trouble
symptom again.
DIAGNOSIS FUNCTION35201120108
DIAGNOSIS CODES CHECK
Read a diagnosis code by the MUT-II or ABS warning lamp.
(Refer to GROUP 00 ± How to Use Troubleshooting/Inspection
Service Points.)
ERASING DIAGNOSIS CODES
Refer to GROUP 00 ± How to Use Troubleshooting/Inspection
Service Points.

ABS <2WD> ± Troubleshooting35B-6
INSPECTION CHART FOR DIAGNOSIS CODES35201130156
Inspect according to the inspection chart that is appropriate for the malfunction code.
Diagnosis
code No.Inspection itemDiagnosis contentReference page
11Front right wheel speed sensorOpen or short circuit35B-7
12Front left wheel speed sensor
13Rear right wheel speed sensor
14Rear left wheel speed sensor
15Wheel speed sensorAbnormal output signal35B-8
16Power supply system35B-8
21Front right wheel speed sensorAbnormal35B-7
22Front left wheel speed sensor
23Rear right wheel speed sensor
24Rear left wheel speed sensor
33Stop lamp switch system35B-9
41Front right solenoid valve35B-10
42Front left solenoid valve
43Rear solenoid valve
51Valve relay35B-11
53Motor relay, motor35B-12
63ABS-ECU35B-41
(Replace the ABS-ECU)
64
(Re lace the ABS-ECU)

ABS <2WD> ± Troubleshooting35B-7
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Code No. 11, 12, 13, 14 Wheel speed sensor open circuit
or short circuitProbable cause
Code No. 21, 22, 23, 24 Wheel speed sensor abnormal
The ABS-ECU determines that an open circuit or short circuit occurs in more than
one line of wheel speed sensors.
Malfunction of wheel speed sensor

Malfunction of wiring harness or connector

Malfunction of ABS-ECU
These codes are output at the following times:

When an open circuit cannot be found, but more than one wheel speed sensor
does not output any signal during driving at 8 km/h or higher.

When a chipped or plugged-up rotor tooth, etc. is detected.

When the sensor output drops and anti-lock control is continuously carried out
due to a defective sensor or a warped rotor.
Malfunction of wheel speed sensor

Malfunction of rotor

Malfunction of wheel bearing

Malfunction of wiring harness or connector

Malfunction of ABS-ECU
NG
Replace the ABS-ECU.
OK
Check trouble symptoms.
OK
Check the following connector.
C-62NG
RepairOK
Wheel bearing check. (Refer to GROUP
26 and 27 ± On-vehicle Service.)
OK
Rotor check. (Refer to P.35B-40.)NGReplace the rotor.
OK
Wheel speed sensor output voltage
check. (Refer to P.35B-24.)NGWheel speed sensor check. (Refer to
P.35B-39.)NGReplace the wheel speed sensor.
OK
Measure at the ABS-ECU connectors
C-62

Disconnect the connector and
measure from the harness side.

Resistance values between 10 ± 23,
7 ± 20, 8 ± 21 and 9 ± 22.
OK: 1.2 ± 1.4 kWNGCheck the following connectors.
A-01, A-07, F-01, F-16, D-01 and C-02NG
Repair
Wheel speed sensor installation check.NG
Repair
OK
Check trouble symptoms.NGCheck the harness wire between each
wheel speed sensor and ABS-ECU, and
repair if necessary.