wheel ISUZU TF SERIES 2004 Workshop Manual

5A-86 BRAKE CONTROL SYSTEM

DTC C0282 (Flash Code 82) 4 Wheel Drive State Input Signal Failure


RTW35AMF000301

Step Action
Value(s) Yes No
1 Was the “Basic Diagnostic Flow Chart” performed?
- Go to Step 2 Go to Basic
Diagnostic
Flow Chart
2 1. Check for a poor connection at EHCU and 2-4WD
control unit.
2. If a problem is found, repair as necessary.
Was a problem found?
- Verify repair Go to Step 3
3 1. Ignition “OFF,” disconnect the EHCU and 2-4WD
control unit.
2. Check the circuit between EHCU and 2-4WD
control unit. (Circuit for an open, short to ground, or
short to voltage.)
3. If a problem is found, repair as necessary.
Was a problem found?
- Verify repair Go to Step 4
4 1. Check the 2-4WD Control system.
2. If a problem is found, repair as necessary.
Was a problem found?
- Verify repair Go to Step 5

ANTI-LOCK BRAKE SYSTEM 5B-1

SECTION 5B
BRAKES
ANTI-LOCK BRAKE SYSTEM
TABLE OF CONTENTS
PAGE
Service Precaution ...................................................................................................................... 5B – 2
Torque Specifications ................................................................................................................ 5B – 3
Electronic Hydraulic Control Unit ........................................................................................... 5B – 7
Electronic Hydraulic Control Unit and Associated Parts ............................................ 5B – 7
Removal .................................................................................................................................... 5B – 7
Installation ................................................................................................................................ 5B – 7
Front Wheel Speed Sensor ....................................................................................................... 5B – 8
Front Wheel Speed Sensor and Associated Parts ........................................................ 5B – 8
Removal .................................................................................................................................... 5B – 9
Inspection and Repair ........................................................................................................... 5B – 9
Installation ................................................................................................................................ 5B – 10
Rear Wheel Speed Sensor ........................................................................................................ 5B – 11
Rear Wheel Sensor and Associated Parts ....................................................................... 5B – 11
Removal .................................................................................................................................... 5B – 11
Inspection and Repair ........................................................................................................... 5B – 11
Installation ................................................................................................................................ 5B – 12
Front Speed Sensor Rotor ........................................................................................................ 5B – 13
Front Sensor Rotor and Associated Parts ....................................................................... 5B – 13
Removal .................................................................................................................................... 5B – 13
Inspection and Repair ........................................................................................................... 5B – 14
Installation ................................................................................................................................ 5B – 14
Rear Speed Sensor Rotor .......................................................................................................... 5B – 16
Rear Sensor Rotor and Associated Parts ........................................................................ 5B – 16
Removal .................................................................................................................................... 5B – 16
Inspection and Repair ........................................................................................................... 5B – 17
Installation ................................................................................................................................ 5B – 17
G-Sensor ........................................................................................................................................ 5B – 19
G-Sensor and Associated Parts ......................................................................................... 5B – 19

ANTI-LOCK BRAKE SYSTEM 5B-7

Electronic Hydraulic Control Unit
Electronic Hydraulic Control Unit and Associated Parts



RHD model LHD model
350R300001-X

Legend


1.
Flare Nut from master cylinder front

2.
Flare Nut to front right wheel cylinder

3. Flare Nut to front left wheel cylinder

4.
Flare Nut to rear wheel cylinder


5.
Electronic Hydraulic Control Unit (EHCU)

6.
Flare Nut from master cylinder rear

7.
Bolt

8.
Front

Removal
1. Disconnect the harness connector.
2. Loosen five flare nuts and remove brake pipes.


After disconnecting brake pipe, cap or tape the
openings of the brake pipe to prevent the entry o
f
foreign matter.
3. Remove three bracket fixing bolts.

Installation
1. Install EHCU and tighten the bolt to the specified
torque.

Torque : 8 N
m (0.8 kg
m /69 lb in)
2. Tighten the flare nuts to the specified torque.

Torque : 16 N
m (1.6 kg
m /12 lb ft)

3. Connect the harness connector.

5B -8 ANTI-LOCK BRAKE SYSTEM

Front Wheel Speed Sensor
Front Wheel Speed Sensor and Associated Parts
4




2

350R300005

ANTI-LOCK BRAKE SYSTEM 5B-11

Rear Wheel Speed Sensor
Rear Wheel Sensor and Associated Parts
420R300008
Legend


1.
Rear Speed Sensor Assembly

2.
Bolt : cable to frame

3.
Connector

4. Bolt : sensor to rear axle


5.
Speed Sensor

6. Bolt : cable to axle

7.
Bolt : sensor to rear axle

8.
Speed Sensor

Removal
1. Disconnect the harness connector (3).
2. Remove the cable fixing bolt (2)(6).
3. Disconnect the cable fixing clips (arrow marked).
4. Remove the speed sensor fixing bolts (4)(7) and
speed sensor (5)(8).

Inspection and Repair
1. Check speed sensor head for presence of foreign
materials; remove any dirt, etc.
2. Check the head for damage, and replace speed
sensor if necessary.

ANTI-LOCK BRAKE SYSTEM 5B-13

Front Speed Sensor Rotor
Front Sensor Rotor and Associated Parts
411R300010
Legend


1.
Sensor Rotor

2.
Hub and Disc


3.
Disc Rotor fixing Bolt

4. Hub and Disc Assembly

Removal
1. Remove the hub and disc assembly (4). (Refer to
the section Front wheel Drive).
2. Remove two disc rotor fixing bolts (3) on a diagonal.
3. Drive out the sensor rotor using a metal bar and
hammer through the two bolt holes.


Discard the used sensor rotor.
4. Install disc rotot fixing bolts and tighten them to the
specified torque.

Torque : 103 N
m (10.5 kg
m /76 lb ft)

ANTI-LOCK BRAKE SYSTEM 5B-15

411R300006
Legend


1.
Hub and Disc

2.
Sensor Rotor


3.
Press

3.
Measure the gap “A” at 4 points at intervals of 90
(degrees).

Confirm that the gap “A” should be within the
specified range.
Range
Type A
4


2 7.0 
7.4 mm (0.276 
0.291 in)
4


4,
4


2 High Ride 7.2
 7.6 mm (0.283
 0.299 in)


411R300016
4. Install the hub and disc assembly. (Refer to the
section Front wheel Drive).

BRAKES 5C-3
REAR WHEEL CYLINDER


LOAD SENSING PROPORTIONING VALVE (LSPV)
RTW35CMF000101

BRAKES 5C-9
MAIN DATA AND SPECIFICATIONS
FRONT DISC BRAKE mm(in.) 4

2 4

4, 4

2 HIGH RIDE
Caliper type Pin slide
Disc outside diameter 256(10.079) 280 (11.023)
Disc thickness 26(1.024) 27 (1.063)
Piston diameter 42.8 (1.685)

2 45.5 (1.79)
Adjustment method Self-adjusting
REAR DRUM BRAKE mm(in.) 4

2 4

4
Type Leading and Trailing
Drum inside diameter 254(10.008) 295 (11.614)
Brake lining dimension 244

50

5 283

45

5
(Length
Width
Thickness) (9.57
1.97
0.20) (11.14
1.77
0.20)
Adjustment method Self-adjusting
WHEEL CYLINDER mm(in.)
Inside diameter : rear 25.4 (1.000) 23.8 (0.937)
MASTER CYLINDER mm(in.)
Type Split
Bore diameter 25.4 (1.000)
Piston stroke (Primary + Secondary) 21.8 + 12 (0.86 + 0.47)
VACUUM SERVO mm(in.) 6VE1/C24NE 4JA1-T/4JA1-TC/4JH1-TC
Diaphragm diameter 205(8.077) + 230(9.055) 180(7.087) + 205(8.077)
4JA1-T
Power cylinder stroke 35 (1.378)
PEDAL RATIO 3.7
BALANCE EBD (with ABS)
Type Load sensing proportioning valve (without ABS)
Blend valve (without ABS)

5C-10 BRAKES
TORQUE SPECIFICATIONS
FRONT WHEEL BRAKE Nm(kgfm/lbft)
E05R300016