Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 156
5A–2
BRAKE CONTROL SYSTEM
Chart B-13 FR Isolation Solenoid Coil Failure
(DTC 43 (Flash out) / C0241, C0243
(Serial communications))
5A–44
. . . . . . . . . . . . . . .
Chart B-14 FR Dump Solenoid Coil Failure
(DTC 44(Flash out) / C0242, C0244
(Serial communications))
5A–44
. . . . . . . . . . . . . . .
Chart B-15 Rear Isolation Solenoid Coil
Failure (DTC 45 (Flash out) / C0251, C0253
(Serial communications))
5A–44
. . . . . . . . . . . . . . .
Chart B-16 Rear Dump Solenoid Coil Failure
(DTC 46 (Flash out) / C0252, C0254
(Serial communications))
5A–45
. . . . . . . . . . . . . . .
Chart B-17 FL Speed Sensor Open or Shorted
(DTC 51 (Flash out) / C0225
(Serial communications))
5A–45
. . . . . . . . . . . . . . .
Chart B-18 FR Speed Sensor Open or Shorted
(DTC 52 (Flash out) / C0221
(Serial communications))
5A–46
. . . . . . . . . . . . . . .
Chart B-19 Rear Speed Sensor Open or
Shorted (DTC 53 (Flash out) / C0235
(Serial communications))
5A–47
. . . . . . . . . . . . . . .
Chart B-20 FL Speed Sensor Missing Signal
(DTC 61 (Flash out) / C0226, C0227
(Serial communications))
5A–48
. . . . . . . . . . . . . . .
Chart B-21 FR Speed Sensor Missing Signal
(DTC 62 (Flash out) / C0222, C0223
(Serial communications))
5A–49
. . . . . . . . . . . . . . .
Chart B-22 Rear Speed Sensor Missing Signal
(DTC 63 (Flash out) / C0236, C0237
(Serial communications))
5A–50
. . . . . . . . . . . . . . .
Chart B-23 Simultaneous Drop-out of Front
Speed Sensor Signal (DTC 64 (Flash out) /
C0229 (Serial communications))
5A–51
. . . . . . . .
Chart B-24 Wheel Speed Input Abnormality
(DTC 65 (Flash out) / C0238 (Serial
communications))
5A–52
. . . . . . . . . . . . . . . . . . . . .
Unit Inspection Procedure
5A–53
. . . . . . . . . . . . . . . .
Chart C-1-1 FL Sensor Output Inspection
Procedure
5A–53
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chart C-1-2 FR Sensor Output Inspection
Procedure
5A–54
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chart C-1-3 Rear Sensor Output Inspection
Procedure
5A–54
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chart TC-1 Sensor Output Inspection
Procedure
5A–55
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools
5A–56
. . . . . . . . . . . . . . . . . . . . . . . . . . .
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 call 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 force, and may damage the fastener. When
you install fasteners, use the correct tightening
sequence and specifications. Following these
instructions can help you avoid damage to parts and
systems.
5A–3
BRAKE CONTROL SYSTEM
General Description
The Anti-lock Brake System (ABS) works on all four
wheels. A combination of wheel speed sensor and
Electronic Hydraulic Control Unit (EHCU) can determine
when a wheel is about to stop turning and adjust brake
pressure to maintain best braking.
This system helps the driver maintain greater control of
the vehicle under heavy braking conditions.
NOTE: The Electronic Hydraulic Control Unit (EHCU)
comprises the Hydraulic Unit (H/U) and the coil Integrated
Module.
C05RW004
Legend
(1) Electronic Line
(2) Hydraulic Line
(3) Hydraulic Unit (H/U)
(4) Coil Integrated Module
(5) Front Wheel Speed Sensor
(6) Rear Wheel Speed Sensor
(7) Proportioning and Bypass (P&B) Valve
5A–4
BRAKE CONTROL SYSTEM
Functional Description
Hydraulic Unit (H/U)
Solenoid Valve
C05RW012
Legend
(1) Isolation Valve
(2) Dump valve
5A–5
BRAKE CONTROL SYSTEM
Normal Braking
During normal (non anti-lock) braking, the solenoid valves
has current flow. The dump valve is closed and the
isolation valve is opened due to spring force.
Brake fluid travels through the centre of the isolation valve
(normally open) around the dump valve (normally closed)
then to the brake pistons.
C05RW010
Legend
(1) Brake
(2) Master Cylinder
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