1991 MITSUBISHI 3000GT Service Manual

SERVICE BRAKES - Hvdraulic Unit (ABS)35-87
14FOO8:
SERVICE POINTS OF REMOVALM350BAB1. REMOVAL OF BRAKE TUBES
Pull up the relay box with harness attached and inserting a
hand under the relay box, remove the brake tubes using the
flare nut wrench.
4. REMOVAL OF HYDRAULIC UNIT
(HU)Remove the hydraulic unit together with the bracket from
the wheel house.
Caution1. The HU is heavy. Use care when removing it.
2. The HU cannot be disassembled. Never loosen its
nuts or bolts.
3. Do not drop or shock the HU.
4.Do not turn the HU upside down or lay it on its side.
SERVICE POINTS OF INSTALLATIONM350DAB6. CONNECTION OF GROUNDING WIRE
Connect the grounding wire at the point shown in the
illustration.
1. INSTALLATION OF BRAKE TUBE
Pull up the relay box with harness attached and inserting a
hand under the relay box, install the brake tubes using flare
nut wrench.
Connect the tube and hose to the hydraulic unit correctly.
(Refer to
P.35-73.)
c
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3588SERVICE BRAKES - Wheel Speed Sensor (ABS)WHEEL SPEED SENSOR (ABS)
REMOVAL AND INSTALLATION

a*1. Front rotorFront speed sensor removal steps
2. Clip*I) ++ 3. Front speed sensorw 4. Front speed sensor bracket*I)5. Rear rotorRear speed sensor removal steps
6. Clipa* l + 8. Rearspeedsensor
M350A-B L/ 1
(Refer to Group 42 - Fender.)
14FOO78LJ
Post-installation Operationl Installation of Splash Shield (Front Only)(Refer to Group 42 - Fender.)l Inspection of A.B.S.(Refer to P.35-7.)TSB Revision

L
SERVICE BRAKES - Wheel Speed Sensor (ABS)35-89

12 Nm9 ft.lbs.
6
2
3
12 Nm- 9 ft.lbs.
a*I, Front rotor
Front speed sensor removal steps
2. Clipl * I)*3. Front speed sensora*5. Rear rotorRear speed sensor removal steps
6. Clip
7. Cable band
+I) l *8. Rear speed sensor9. O-ringPre-removal Operation
lRemoval of Splash Shield (Front Only)(Refer to Group 42 - Fender.)1
Post-installation Operationl Installation of Splash Shield (Front Only)(Refer to Group 42 - Fender.)l Inspection of A.B.S.
(Refer to P.35-7.)14FOlOO
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SERVICE BRAKES - Wheel Speed Sensor (ABS)
IFrontRear

+ : Pole piece14N016:14NOlO:
SERVICE POINTS OF REMOVALM35OBAC
1.REMOVAL OF FRONT ROTOR / 5. REMOVAL OF REAR
ROTOR
CautiondDo not damage rotor teeth and never drop the rotor.
If the rotor has missing teeth or is deformed, accuratewheel speed detection cannot be expected and the
system may fail to function normally.
Use particular care in handling the front rotor of an
AWD vehicle as it cannot be disassembled.
3.REMOVAL OF FRONT SPEED SENSOR / 8. REAR SPEED
SENSOR
Caution
When removing the speed sensor from the knuckle, usecare not to strike the tip of the pole piece against the
rotor teeth or any other parts.
INSPECTIONMJSOCAC
INSPECTION OF SPEED SENSOR(1) Check the tip of the speed sensor pole piece for deposits of
metal or other foreign matter and clean the pole piece as
necessary.
Also check the pole piece for damage and replace if
damaged.d
Caution
The speed sensor pole piece is magnetized by a built-in
magnet inside the sensor, so it tends to attract metal.If the pole piece is damaged, accurate wheel speed
detection may not be expected.
(2) Measure resistance between speed sensor terminals.
Standard value:
Front
Rear
1.4-2.2
kR1.3-2.1
kR
0.8- 1.2 kfl
If the internal resistance of the speed sensor is out of
specification, replace with a new one.

SERVICE BRAKES - Wheel SDeed Sensor lABSI35-91
/
i
lARnlA6
14N012‘
3
(3) zue$ the speed sensor cable for open circuit and replace if
NOTERemove the cable clamp from the body and, while flexing
the cable near the clamp, check for temporary open circuit.
Also check connector connection and terminal insertion.
INSPECTION OF ROTORCheck the rotor for missing or worn teeth and replace if faulty.
SERVICE POINTS OF INSTALLATIONM350DAC8. INSTALLATION OF REAR SPEED SENSOR
Insert a feeler gauge between the speed sensor pole piece
and the rotor tooth surface and tighten the speed sensor to
specified torque where the clearance is as specified all
around.Standard value: 0.2
- 0.7 mm (.008 - .028 in.)
NOTEThe rear speed sensor pole piece-to-rotor tooth surface
clearance is not adjustable in the case of AWD vehicles. In
this case, measure the sensor mounting surface-to-rotor
tooth surface clearance.
Standard value: 28.15
- 28.45 mm (1.11 - 1.12 in.)
4. INSTALLATION OF FRONT SPEED SENSOR BRACKET
NOTE
(I) The right and left speed sensor brackets differ in shape.
Install correctly referring to the identification symbols.
FR: For front speed sensor
R:For right wheel
L:For left wheel
(2) After installation of the speed sensor to the bracket,
check that the letters “FR” are visible.
3. INSTALLATION OF FRONT SPEED SENSOR
Caution
Handle the speed sensor carefully so as not to strike the
tip of the pole piece or the rotor teeth against any metalparts and damage them.
Insert a feeler gauge between the speed sensor pole piece
and rotor tooth surface and tighten the speed sensor to
specified torque where the clearance is as specified all
around.Standard value: 0.3
- 0.9 mm (.012 - .035 in.)
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35-92SERVICE BRAKES - G Sensor (AWD - ABS)
G SENSOR (AWD
- ABS)
REMOVALINSTALLATION
Pre-removal and Post-installation OperationRemoval and installation of Front
(Refer to Group 52A - Console Box.)
M35OA-C5Nm
4 ft.lbs.Removal steps
1. G sensor connector
2. G sensor
3. G sensor bracket14FO115
114A019)14A0195
14A0196I
INSPECTIONM350CAD1. INSPECTION OF G SENSOR
(I) Lay the G sensor on a level surface and check for
continuity between its terminals.
(2) Incline the G sensor toward the vehicle front gradually
and check that continuity is lost at an angle of 30” or
more.(3) Incline the G sensor toward the vehicle rear gradually
and check that continuity is lost at an angle of 30” or
more.TSB Revision

SERVICE BRAKES - Electronic Control Unit (ABS)
ELECTRONIC CONTROL UNIT (ABS)
REMOVAL AND INSTALLATION35-93M350A.D
14FOO79
Post-installation Operationl Installation of Quarter Triml Installation of Rear Seatback (R)l Installation of Rear Seat CushionRemoval steps
4*1, Control unit connector connection
2. Electronic control unit
l inspection of A.B.S.
(Refer to P.35-7.)
SERVICE POINT OF REMOVALM350BAD1. REMOVAL OF CONTROL UNIT CONNECTOR
Insert a screwdriver into the lock section as illustrated and
pull out the connector from below.
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