2007 ISUZU KB P190 wheel

BRAKE CONTROL SYSTEM 5A-63
Step Action Value(s) Yes No
8 Does the sensor rotor have missing tooth or saw-
toothed? - Go to Step 14 Go to Step 9
9 1. Clear the DTC.
2. Test run the vehicle, and check the DTC. Is the DTC displayed repeatedly? - Go to Step 18 Go to Step 17
10 Is the wheel speed sensor damaged or saw-toothed?
- Go to Step 15 Go to Step 16
11 Repair or replace the wheel bearing.
Is the action complete? - Verify repair -
12 Repair or replace the rear left speed sensor or the
sensor rotor.
Is the action complete? - Verify repair -
13 Repair the rear left speed sensor or the sensor rotor. Is the action complete? - Verify repair -
14 Replace the sensor rotor.
Is the action complete? - Verify repair -
15 Replace the rear left wheel speed sensor.
Is the action complete? - Verify repair -
16 Repair or replace the rear left speed sensor circuits.
Is the action complete? - Verify repair -
17 Check the connection btween the EHCU and the rear
left wheel speed sensor and repair as necessary
Refer to "Note on Intermittents".
Is the action complete? - Verify repair -
18 Replace EHCU.
Note: Check the EHCU type for specification, when
the EHCU is replaced.
(Specification ; 2W D model or 4W D model)
Is the action complete? - Verify repair -


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ISUZU KB P190 2007

5A-64 BRAKE CONTROL SYSTEM
DTC C0238 (Flash Code 38) Front Speed Sensor Correlation

Step Action Value(s) Yes No
1 W ere the steps of the “Basic Diagnostic Flow Chart”
performed?
- Go to Step 2 Go to Basic
Diagnostic
Flow Chart
2 1. Check for the tire size of each wheels.
2. If the tire size is different, replace the tire.
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 3
3 1. Check for the gear ratio of a front axle differential gear and a rear axle differential gear.
2. If the gear ratio is different, repair the gear ratio.
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 4
4 Select “Display DTCs” with the Tech 2.
Note: Perform the various tests (actuator test, test
run, brake test, etc.) then observe the DTC with a
Tech 2.
Are any DTCs stored? - Go to Step 5 Verify repair
5 1. Check for a poor connection at the wheel speed sensor harness connector.
2. Check installation condition for wheel speed sensor.
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 6
6 1. Check condition for sensor rotor.
2. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 7
7 1. Ignition “OFF” disconnect the EHCU and wheel
speed sensor.
2. Check the circuit between EHCU and wheel speed sensor. (short ground, or short to voltage)
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 8
8 1. Ignition “OFF”.
2. Check the EHCU circuit for an open, short to ground, or short to voltage. Also, check the EHCU
ignition feed circuit for an open or short to ground
and the EHCU ground circuit for an open or short to
voltage.
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 9
9 1. Ignition “ON”, engine “OFF”.
2. Select “Display DTCs” with the Tech 2. Note: Perform the various tests (actuator test, test
run, brake test, etc.) then observe the DTC with a
Tech 2.
Are any DTCs stored? - Go to Step 10 Verify repair

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ISUZU KB P190 2007

5A-82 BRAKE CONTROL SYSTEM
DTC C0282 (Flash Code 82) 4 Wheel Drive State Input Signal Failure




RTW 75AMF001501

Step Action Value(s) Yes No
1 W ere the steps of 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 2-4W D control unit.
2. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 3
3 1. Ignition “OFF”, disconnect the EHCU and 2-4W D
control unit.
2. Check the circuit between EHCU and 2-4W D control unit. (Circuit for an open, short to ground, or
short to voltage.)
3. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 4
4 1. Check the 2-4W D Control system.
2. If a problem is found, repair as necessary. W as a problem found? - Verify repair Go to Step 5

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ISUZU KB P190 2007

ANTI-LOCK BRAKE SYSTEM 5B-1
SECTION 5B
ANTI-LOCK BRAKE SYSTEM
TABLE OF CONTENTS PAGE
Ser vice Precau tion ....................................................................................................................... 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 Speed Sensor and Associated Parts .......................................................... 5B – 11
Removal ..................................................................................................................................... 5B – 11
Inspection and Repair ............................................................................................................ 5B – 11
Installation ............................................................................................................................... . 5B – 12
Front Sensor Rotor ...................................................................................................................... 5B – 13
Front Sensor Rotor and Associated Parts ....................................................................... 5B – 13
Removal ..................................................................................................................................... 5B – 13
Inspection and Repair ............................................................................................................ 5B – 14
Installation ............................................................................................................................... . 5B – 14
Rear 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
Removal ..................................................................................................................................... 5B – 19
Installation ............................................................................................................................... . 5B – 19
Special Tools ................................................................................................................................. 5B – 20

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ISUZU KB P190 2007

5B-4 ANTI-LOCK BRAKE SYSTEM
4×
××
×
2 (Except High Ride Suspension) Front Wheel Speed Sensor N⋅m (kgf ⋅m/lb ⋅ft)







RTW 55ALF000301

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ISUZU KB P190 2007

ANTI-LOCK BRAKE SYSTEM 5B-5
4×
××
×
2 High Ride Suspension, 4 ×
××
×
4 Front Wheel Speed Sensor N⋅m (kgf ⋅m/lb ⋅ft)







RTW 55ALF000101

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ISUZU KB P190 2007

5B-6 ANTI-LOCK BRAKE SYSTEM
Rear Wheel Speed Sensor N⋅m (kgf ⋅m/lb ⋅ft)

E05R300008

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ISUZU KB P190 2007

ANTI-LOCK BRAKE SYSTEM 5B-7
Electronic Hydraulic Control Unit
Electronic Hydraulic Control Unit and Associated Parts



RTW 75BMF000301

Legend
(1) Flare Nut to front right wheel cylinder
(2) Flare Nut to front left wheel cylinder
(3) Electronic Hydraulic Control Unit (EHCU)
(4) Flare Nut from master cylinder front


(5) Bolt
(6) Flare Nut from master cylinder rear
(7) Flare Nut to rear wheel cylinder

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 entr
y
of 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 kgf ⋅m /69 lb·in)
2. Tighten the flare nuts to the specified torque.
Torque: 16 N ⋅m (1.6 kgf ⋅m /12 lb·ft)
3. Connect the harness connector.

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ISUZU KB P190 2007