2000 MITSUBISHI MONTERO brake sensor

AUTOMATIC TRANSMISSION -Troubleshooting 23-57
Inspection procedure 14
Poor acceleration
Probable cause
If the vehicle does not accelerate after downshifting, the cause is probably a
malfunction of the enginesystem or of a brake or clutch.DMalfunction of enginesystem
DMalfunction of brake or clutch
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
LRefer to the Transmission Workshop Manual.
Engine system check
DControl system, ignition system, fuel system, vehicle bodyNG
Repair or replace
OK
Brake and clutch check
L
DCheck for a problem such as burnt facing, poor piston
sealing or interference with the retainer.Check the trouble symptoms.
Replace the engine-A/T-ECU or A/T-ECU.NG
Inspection procedure 15
Vibration
Probable cause
If vibration occurs when accelerating or decelerating while driving at a constant
speed or driving in top range, the cause is probably abnormal damper clutch
pressure, or a malfunction of theenginesystem, DCC solenoid valve, torque
converter or valve body.DAbnormal damper clutch pressure
DMalfunction of enginesystem
DMalfunction of DCC solenoid valve
DMalfunction of torque converter
DMalfunction of valve body
DMalfunction of engine-A/T-ECU <6G7>
DMalfunction of A/T-ECU<4M4>
LRefer to the Transmission Workshop Manual.
NGReplace the DCC solenoid valve.
L
OK
Does the problem still occur when theengine coolant
temperature sensor is disconnected?YESEngine system check
DControl system, ignition system, fuel system, vehicle body
NO
Fluid pressure test (Refer to P.23-106.)
DMeasure the damper clutch fluid pressure.
Standard value:Refer to P.23-106.NGDisassemble, clean and re-assemble the valve body.
L
DMake sure that the mounting bolts are not loose and that
the O-ring and valve body are notdamaged or positioned
incorrectly.
DIf the extent of thedamagelooks too bad for repairs to be
carried out, replace the valve body assembly.
OK
Replace the torque converter assembly.Check the trouble symptoms.
Replace the engine-A/T-ECU or A/T-ECU.OK
MUT-
IIActuator Test
DNo. 6 DCC solenoid valve
OK:Sound of operation can be heard


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AUTOMATIC TRANSMISSION -Troubleshooting 23-61
DATA LIST REFERENCE TABLE
Data
list No.Check itemInspection conditionsNormal condition
11APSIgnition switch: ON
Engine: StoppedAccelerator pedal:
Fully closed985 - 1085 mV
Engine: Stopped
Selector lever posi-
tion: P
Accelerator pedal:
DepressedGradually increases from the above
value.
Accelerator pedal:
Fully open4000 mV or higher
15A/T fluid tempera-
ture sensorDriving after en-
gine has warmed
upDrive for 15 minutes
or more until the ATF
temperature reaches
70 - 80°C.Gradually increases to 70 - 80°C.
21Crank angle sen-
sor <6G7>Engine: Idling
Selector lever posi-Compare the engine
speeds displayed onIdentical
sor <6G7>
Engine speed sen-
sor <4M4>Selector lever posi-
tion: Pspeeds displayed on
the tachometer and
the MUT-II.
22Input shaft speed
sensorShift range: 4thDriving at a constant
speed of 50 km/h in
4th1300 - 1600 r/min
23Output shaft speed
sensorShift range: 4thDriving at a constant
speed of 50 km/h in
4th1300 - 1600 r/min
25Wide open throttleAccelerator pedalReleasedOFF
switchpositionDepressedON
26Stop lamp switchIgnition switch: ON
Engine: StoppedBrake pedal: De-
pressedON
Engine: Stopped
Brake pedal: Re-
leasedOFF
29Vehicle speed sen-
sorSelector lever posi-
tion: Sports modeIdling in 1st
(Vehicle stopped)0 km/h
Driving at a constant
speed of 50 km/h in
3rd50 km/h
31LR solenoid valve
duty ratioSelector lever posi-
tion: Sports modeData List No.No. 31No. 32No. 33No. 34No.35
32UD solenoid valve
duty ratioDriving at a constant
speed in 1st0%0%100%100%0%
332nd solenoid valve
duty ratioDriving at a constant
speed in 2nd100%0%0%100%0%
34OD solenoid valve
duty ratioDriving at a constant
speed in 3rd100%0%100%0%0%
35RED solenoid
valve duty ratioDriving at a constant
speed in 4th0%0%100%0%100%
Driving at a constant
speed in 5th100%100%0%0%100%


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AUTOMATIC TRANSMISSION -Troubleshooting 23-68
Ter-
minal
No.Standard value Inspection conditions Check item
54Input communication withEngine: IdlingOther than 0 V
engine-ECUSelector lever position: D
55Inhibitor switch PIgnition switch: ON
Selector lever position: PSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
56Inhibitor switch NIgnition switch: ON
Selector lever position: NSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
57Select switchIgnition switch: ON
Selector lever operation: Sports modeSystem voltage
Ignition switch: ON
Selector lever operation: Other than the above0V
58Downshift switchIgnition switch: ON
Selector lever position: Downshifted in Sports mode
and lever heldSystem voltage
Ignition switch: ON
Selector lever operation: Other than the above0V
59Stop lamp switchIgnition switch: ON
Brake pedal DepressedSystem voltage
Ignition switch: ON
Brake pedal Released0V
62DIR solenoid valveEngine: Idling
Shift range: ParkSystem voltage
Engine: Idling
Shift range: 2nd7-9V
65Wide open throttle switchAccelerator pedal: Released4.5 - 5.5 V
Accelerator pedal: DepressedLess than 0.4 V
66Inhibitor switch RIgnition switch: ON
Selector lever position: RSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
67Inhibitor switch DIgnition switch: ON
Selector lever position: DSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
68Upshift switchIgnition switch: ON
Selector lever position: Upshifted in Sports mode and
lever heldSystem voltage
Ignition switch: ON
Selector lever position: Other than the above0V
69Vehicle speed sensorWhen stopped0V
When starting to drive forward slowly.0 V and 5 V alter-
nates
71A/T control relayIgnition switch: OFF0V
Ignition switch: ON10 - 12 V
72EarthIgnition switch: ON0V


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AUTOMATIC TRANSMISSION -Troubleshooting II>23-90
Ter-
minal
No.Check itemInspection conditionsStandard value
1Shift actuatorTransfer shift lever position: 2H®4H5.6 V®11.0 V®
5.6 V
3Shift actuatorTransfer shift lever position: 4H®2H5.6 V®11.0 V®
5.6 V
5Accelerator pedal positionAccelerator pedal: Fully closed (engine stopped)0.985 - 1.085 V
sensor (APS)Accelerator pedal: Fully open (engine stopped)4.0 V or higher
7Front propeller shaft speed
sensorMeasure the voltage between terminals 7 and 18 using
an oscilloscope.
Engine: 2 000 r/min
Shift range: 4thOscilloscope check
procedure (Refer to
P. 23-69 Pattern B>.)
9Rear propeller shaft speed
sensorMeasure the voltage between terminals 9 and 18 using
an oscilloscope.
Engine: 2 000 r/min
Shift range: 4thOscilloscope check
procedure (Refer to
P. 23-69 Pattern B>.)
11Diagnosis outputWhen normal (no diagnosis codes are output)0 V and 5 V alterna-
tes
13Power supplyIgnition switch: OFF0V
Ignition switch: ONSystem voltage
18Sensor earthAt all times0.5 V or less
20Transfer lever switch 2HTransfer shift lever position: 2HSystem voltage
Transfer shift lever position: Other than the above0V
21Transfer lever switch 4HTransfer shift lever position: 4HSystem voltage
Transfer shift lever position: Other than the above0V
22Transfer lever switch 4HLcTransfer shift lever position: 4HLcSystem voltage
Transfer shift lever position: Other than the above0V
23Transfer lever switch 4LLcTransfer shift lever position: 4LLcSystem voltage
Transfer shift lever position: Other than the above0V
24Diagnosis control––
25EarthAt all times0V
26EarthAt all times0V
31Backup power supplyAt all timesSystem voltage
32Inhibitor switch NSelector lever position: NSystem voltage
Selector lever position: Other than the above0V
33Inhibitor switch PSelector lever position: PSystem voltage
Selector lever position: Other than the above0V
34Stop lamp switchBrake pedal: DepressedSystem voltage
Brake pedal: Released0V
35EarthAt all times0V
37Rear wheel indicator lampOther than during transfer selectionSystem voltage
38Front wheel indicator lampDuring 4WDSystem voltage
39Earth <6G7>At all times0V


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35A-2
BASIC BRAKE
SYSTEM
CONTENTS
GENERAL INFORMATION 3..................
SERVICE SPECIFICATIONS 5.................
LUBRICANTS 6..............................
SPECIAL TOOLS 6..........................
TROUBLESHOOTING
7......................
ON-VEHICLE SERVICE 19...................
Brake Pedal Check and Adjustment 19..........
Hydraulic Brake Booster (HBB) Operation Check
20........................
HBB Check 23............
HBB Motor Relay Continuity Check
24........................
Brake Booster Operating Test
24.....................
Check Valve Operation Check
25.....................
Load Sensing Spring Length Check and
Adjustment 25.........
Load Sensing Proportioning Valve Function
Test 26................
Bleeding 27...............Bleeding 29.............
Brake Fluid Level Sensor Check 30.............
Brake Booster Vacuum Switch Check
30..................
Disc Brake Pad Check and Replacement 31.....
Disc Brake Rotor Check 32.....................
Brake Disc Thickness Check 32.................
Brake Disc Run-out Check and Correction 33....
BRAKE PEDAL 34..........................
HYDRAULIC BRAKE BOOSTER (HBB)
36....................
HBB BUZZER 40......
MASTER CYLINDER AND BRAKE
BOOSTER 41......
Master Cylinder 43.............................
FRONT DISC BRAKE 44....................
REAR DISC BRAKE 49......................
LOAD SENSING PROPORTIONING
VALVE 54..........


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35B-1
ANTI-SKID
BRAKING SYSTEM
(ABS) <4WD>
CONTENTS
GENERAL INFORMATION 2..................
SERVICE SPECIFICATIONS 4.................
LUBRICANT Refer to GROUP 35A...........
SEALANTS Refer to GROUP 35A............
SPECIAL TOOLS 4..........................
TROUBLESHOOTING 4.......................
ON-VEHICLE SERVICE 27...................
Wheel Speed Sensor Output Voltage
Measurement 27...............................
ABS Valve Relay Continuity Check 28...........
Hydraulic Brake Booster (HBB) - Hydraulic Unit
Check 29......................................
Solenoid Valve Check 30.......................
When the Battery is Flat 31....................
Brake Pedal Check and Adjustment
Refer to GROUP 35A ..........................
Hydraulic Brake Booster (HBB) Operation Check
Refer to GROUP 35A ..........................
Hydraulic Brake Booster (HBB) Check
Refer to GROUP 35A ..........................Motor Relay Continuity Check
Refer to GROUP 35A ..........................
Bleeding Refer to GROUP 35A..................
Brake Fluid Level Sensor Check
Refer to GROUP 35A ..........................
Disc Brake Pad Check and Replacement
Refer to GROUP 35A ..........................
Brake Disc Thickness Check
Refer to GROUP 35A ..........................
Brake Disc Runout Check and Correction
Refer to GROUP 35A ..........................BRAKE PEDAL Refer to GROUP 35A........
HYDRAULIC BRAKE BOOSTER (HBB)
Refer to GROUP 35A ........................
HBB BUZZER Refer to GROUP 35A..........
FRONT DISC BRAKE Refer to GROUP 35A..
REAR DISC BRAKE Refer to GROUP 35A....
ABS-ECU 32................................
WHEEL SPEED SENSOR 33.................
G-SENSOR 36..............................


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ABS <4WD> -General Information35B-2
GENERAL INFORMATION
ABS has been adopted as standard equipment
in all vehicles to maintain directional stability and
steering performance during sudden braking.
The ABS control method used is a 4-sensor,
4-channel method (previous models: 4-sensor,
3- channel method
)which allows the brake
pressures for all four wheels to be controlled
independently of each other. The system has the
following features.
DEBD
*(Electronic Brake force Distribution
system) control has been added to provide the
ideal braking force for the rear wheels.DThe hydraulic unit function has been integrated
with the hydraulic brake booster (HBB).
DSelect solenoid valves (two valves for FL and
FR) have been adopted in order to reduce the
pedal kickback and improve the operation
feeling when the ABS is operating.
DIndependent 4-wheel control is carried out wile
the vehicle is turning in order to increase the
braking force.
NOTE
*EBD: Electronic Brake-force Distribution
EBD CONTROL
In ABS, electronic control method is used whereby
the rear wheel brake hydraulic pressure during
braking is regulated by rear wheel control solenoid
valves in accordance with the vehicle’s rate of
deceleration and the front and rear wheel slippage
which are calculated from the signals received from
the various wheel sensors. EBD control is a control
system which provides a high level of control for
both vehicle braking force and vehicle stability. The
system has the following features.
DBecause the system provides the optimum rear
wheel braking force regardless of the vehicle
laden condition and the condition of the road
surface, the system reduces the required pedal
depression force, particularly when the vehicle
is heavily laden or driving on road surfaces
with high frictional coefficients.DBecause the duty placed on the front brakes
has been reduced, the increases in pad
temperature can be controlled during front
brakes applying to improve the wear resistance
characteristics of the pad.
DControl valves such as the proportioning valve
are no longer required.
SPECIFICATIONS
ItemSpecifications
ABS control method4-sensor, 4-channel
No. of ABS rotor teethFront50
Rear50
ABS speed sensorTypeMagnet coil type
Gap between sensor and rotor mm0.9 (non-adjustable type)


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ABS <4WD> -Troubleshooting35B-21
Inspection procedure 5
Abnormal brake operation
Probable cause
Braking operation variesdepending on the driving conditions and the road
surface, which can make it difficult to diagnose a problem. However, if the
diagnosis codes displayed are normal, carry out the following inspection
procedure.DIncorrect wheel speed sensor installation
DMalfunction of harness or connector
DMalfunction of wheel speed sensor
DMalfunction of ABS rotor
DForeign material adhering to speed sensor
DMalfunction of wheel bearing
DMalfunction of HBB
DMalfunction of the ABS-ECU
Wheel speed sensor installation checkNG
Repair
OKCheck the hydraulic unit inside the hydraulic brake booster
(HBB). (Refer to P.35B-29.)
NG
Check the wheel speed sensor (Refer to P.35B-34.)NG
OK
Check the ABS rotor (Refer to P.35B-33).NG
Replace
OK
NG
Replace
OK
NG
Repair
OK
NG
NG
OK
Check the following connector:E-106
OK
Check the trouble symptoms.
NG
Replace the ABS-ECU.NG
Repair
Check the harness, and repair if necessary.
DBetween each wheel speed sensor and ABS-ECU ReplaceMeasure at ABS-ECU connector E-106.
DDisconnect the connector and measure at the harness
side.
DFront: resistance between 10 – 23, 7 – 20
Rear: resistance between 8 – 21, 9 – 22
OK:1.0 - 1.5 k
W
(Move the sensor harness and connector while checking at
this time.)
Check the following connectors:A-04 , A-23, A-39,
D-124, D-143 , E-10, E-106, F-17, G-11, G-15
Wheel bearing check
(Refer to GROUP 26, 27 - On-vehicle Service.)
Check the trouble symptoms.
Wheel speed sensor output voltage check (Refer to P.35B-27.)OK


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