Opel Frontera UE. Manual - part 114

 

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Opel Frontera UE. Manual - part 114

 

 

5A–2

BRAKE CONTROL SYSTEM

communications))  .................................... 5A - 43

Chart B-12 FL Dump Solenoid Coil

Failure (DTC 42 (Flash out) / C0246, 
C0248 (Serial communications))  ............. 5A - 43

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 

(DTC 61 (Flash out) / C0226, C0227 (Serial 
communications)) ..................................... 5A - 48

Chart B-21 FR Speed Sensor Missing 

(DTC 62 (Flash out) / C0222, C0223 (Serial 
communications)) ..................................... 5A - 49

Chart B-22 Rear Speed Sensor Missing

(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

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 - 55

Chart TC-1 Sensor Output Inspection 

Procedure ................................................ 5A - 55

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.

BRAKE CONTROL SYSTEM

5A–3

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

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(1) Electronic
(2) Hydraulic
(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

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(1) Isolation Valve

(2) Dump valve

BRAKE CONTROL SYSTEM

5A–5

Normal Braking

During normal (non anti-lock) braking, the solenoid 
valves are without current and closed due to spring 
force.

Brake fluid travels through the centre of the normally 
open isolation valve around the normally closed dump 
valve and on to the brake pistons.

C05RW010

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(1) Brake

(2) Master Cylinder

 

 

 

 

 

 

 

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