SECTION 5B - ANTI-LOCK BRAKE SYSTEM
Service Precaution
Electronic Hydraulic Control Unit
Electronic Hydraulic Control Unit and
Associated Parts
Removal
Disassembled View
Disassembly
Reassembly
Installation
Front Wheel Speed Sensor
Front Wheel Speed Sensor and
Associated Parts
Removal
Inspection and Repair
Installation
Rear Wheel Speed Sensor
Removal
Inspection and Repair
Installation
Service Precaution
WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE
SRS COMPONENTS OR THE SRS WIRING, REFER
TO THE SRS SERVICE INFORMATION. FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.
CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also ca ll out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or
other corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping f or ce, and may dama ge the fastener . Wh en
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts
and systems.
Techline
Techline
Electronic Hydraulic Control Unit
Electronic Hydraulic Control Unit and Associated Parts
350RW017
Legend
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Removal
1. Remove brake pipes.
• After disconnecting brake pipe, cap or tape the
openings of the brake pipe to pre v ent the entry of
foreign matter.
2. Remove three bracke fixing bolts.
3. Disconnect red clip from harness connector.
350RW018
(1) EHCU
(2) Bolt (3) Bracket
(4) Bolt and Nut
4. Remove harness connector.
5. Remove EHCU ASM.
6. Remove EHCU.
Disassembled View
350RW025
Legend
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Disassembly
1. Remove fixing bolts from EHCU.
2. Remove coil integrated module from hydraulic unit.
Reassembly
To reassembly, follow the disa ssembly steps in the
reverse order, noting the following points:
Torque:
Fixing bolts: 4.4 N·m (4.5 kg·cm/39 lb in)
Installation
To install, follow the removal steps in the reverse order,
noting the following points:
Torque:
Hydraulic unit fixing nuts : 22 N·m (2.2 kg·m/16
lbft)
Ground cable : 14 N·m (1.4 kg·m/10 lbft)
Brake pipe (joint bolts) : 16 N·m (1.6 kg·m/12 lbft)
• After installing the hydraulic unit, bleed brakes
completely. See Hydraulic Brakes in Power–assisted
brake system section.
(1) Fixing Bolts
(2) Coil Integrated Module
(3) Hydraulic Unit (H/U)
Front Wheel Speed Sensor
Front Wheel Speed Sensor and Associated Parts
350RS033
Legend
EndOFCallout
Removal
1.Remove speed sensor connector.
2.Remove sensor cable fixing bolt (Upper side).
3.Remove sensor cable fixing bolt (Lower side).
4.Remove the speed sensor cable fixing bolt.
5.Remove speed sensor.
Inspection and Repair
1.Check the speed sensor pole piece for presence of
foreign materials; remove any dirt, etc.
2.Check the pole piece for damage; replace speed
sensor if necessary.
3.Check the speed sensor cable for short or open
circuit, and replace with a new one if necessary.
To check for cable short or open, bend or stretch the
cable while checking for continuity.
4.Check the sensor ring for damage including tooth
chipping, and if damaged, replace the sensor ring
assembly. Refer to removal of the sensor ring in
Section 4C “Front hub and disc".
Installation
1. Install speed sensor and take care not to hit the
speed sensor pole piece during installation.
2. Install speed sensor fixing bolt and tighten the fixing
bolt to the specified torque.
Torque: 7 N·m (0.7 kg·m/61 lbin)
3. Install speed sensor cable fixing bolt (Lower side)
and tighten the fixing bolt to the specified torque.
Torque : 20 N·m (2.0 kg·m/14 lbft)
4. Install speed sensor cable fixing bolt (Upper side)
and tighten the fixing bolt to the specified torque.
Torque : 6 N·m (0.6 kg·m/52 lbft)
NO TE: Confirm that a white line marked on the cable is
not twisted when connecting the speed sensor cable .
5. Install speed sensor connector.
(1) Speed Sensor Connector
(2) Sensor Cable Fixing Bolt (Upper side)
(3) Sensor Cable Fixing Bolt (Lower side)
(4) Speed Sensor Fixing Bolt
(5) Speed Sensor
Rear Wheel Speed Sensor
Removal
1.Disconnect harness connector (1).
2.Remove sensor fixing bolt (2) .
3.Remove speed sensor (3).
350RX003
Inspection and Repair
1.Check speed sensor pole piece for presence of
foreign materials; remove any dirt, etc.
2.Check the pole piece for damage, and replace
speed sensor if necessary.
3.Check speed sensor cable for short or open, and
replace with a new one if necessary. To check for
cable short or open, bend or stretch the cable while
checking for continuity.
4.Check the sensor ring for damage including tooth
chipping, and if damaged, replace the axle shaft
assembly. Refer to removal of the sensor ring in
Section 4A2 “Differential (Rear)".
Installation
1. Install speed sensor (3).
2. Tighten the sensor fixing bolt (2) to the specified
torque.
Torque : 24 N·m (2.4 kg·m/17 lbft)
3. Connect harness connector (1).
350RX003