2007 ISUZU KB P190 engine

4B-46 REAR AXLE
1. ABNORMAL REAR AXLE NOISE
1) Noise when the Engine is Driving the Vehicle

Checkpoint Trouble Cause Countermeasure

Replenish the gear oilInsufficient gear oil
NG
Differential side bearingAdjust the differential side
bearing preload
Replace the drive pinion
bearings
Adjust the drive pinion bearing
preload
Replace the gear oil
Loose differential side
bearings
W orn drive pinion bearings
Loose drive pinion bearings
W rong or poor grade gear oil
Drive pinion to ring gear
backlash
Drive pinion end play
Adjust the backlashToo much or too little backlash
Continued on the next page OK
OK
NG
NG
NG
NG
NG
OK
OK
Rear axle gear oil
Replace the differential side
bearingsW orn differential side bearings
NG


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ISUZU KB P190 2007

4C1-6 FRONT WHEEL DRIVE
RECOMMENDED LIQUID GASKET
Type Brand Name Manufacture Remarks

RTV* Silicon Base ThreeBond 1207B
ThreeBond 1207C

ThreeBond 1215
Three Bond
Three Bond

Three Bond
For Engine Repairs


For Axle Case
Repairs, T/M
W ater Base ThreeBond 1141E Three Bond For Engine Repairs

Solvent ThreeBond 1104
BelcoBond 4
BelcoBond 401
BelcoBond 402 Three bond
Isuzu
Isuzu
Isuzu
For Engine Repairs
Anaerobic LOCTITE 515
LOCTITE 518 Loctite
Loctite All
* RTV : Room Temperature Vulcanizer

Note :
1. It is very important that the liquid gaskets listed above or their exact equivalent be used on the vehicle.
2. Be careful to use the specified amount of liquid gasket. Follow the manufacture's instructions at all times.
3. Be absolutely sure to remove all lubricants and moisture from the connecting surfaces before applying the liquid gasket.
The connecting surfaces must be perfectly dry.
4. LOCTITE 515 and LOCTITE 518 harden upon contact with a metal surface.
Do not apply LOCTITE 515 or LOCTITE 518 between two metal surfaces having a clearance of greater than 0.25 mm (0.01 in). Poor adhesion will result.

RECOMMENDED THREAD LOCKING AGENTS

LOCTITE Type LOCTITE Color Application Steps

LOCTITE 242
Blue 1. Completely remove all lubricant and moisture from the bolts and
the female threaded surfaces of the parts to be joined.
The surfaces must be perfectly dry.

LOCTITE 262
Red 2. Apply LOCTITE to the bolts.


LOCTITE 270
Green

LOCTITE 271
Red
3. Tighten the bolts to the specified torque.
4. W ait at least on hour before continuing the installation procedure.


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BRAKE CONTROL SYSTEM 5A-11
Circuit Diagram
With 4JA1 engine


RTW 78AXF007201

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5A-12 BRAKE CONTROL SYSTEM

With HFV6 engine



RTW 78AXF012801

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BRAKE CONTROL SYSTEM 5A-13

Except with 4JA1, HFV6 engine


RTW 78AXF018701

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5A-14 BRAKE CONTROL SYSTEM
Connector List
No. Connector face No. Connector face
B-23
White

Meter-A C-36
SilverEngine room - LH ; Ground
B-24
White

Meter-B C-44
WhiteStoplight switch
B-48
Black
G sensor C-53
OrangeABS sensor Front-RH
B-54
White
J/B I2 C-54
OrangeABS sensor Front-LH
B-56
White
J/B I4 C-67
Black
EHCU
B-58
Black
Data link connector C-107
WhiteJ/B E2
B-62
White
Ignition switch (IGSUB : G1) C-108
WhiteJ/B E1
B-63
White
Ignition switch (IGSUB : G2) C-109
SilverBody-LH ; ground
B-82
Silver
W eld splice 6 (Ground) C-111
BlackTransfer case control module
C-2
Silver
Engine room - RH ground F-4
Gray ABS sensor


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BRAKE CONTROL SYSTEM 5A-15

No. Connector face No. Connector face
H-6
White
Engine room ~ INST P-7
Battery (ALT)
H-7
White
Engine room ~ INST P-10
SilverEngine ground
H-9
White
Engine room ~ Chassis P-11
SilverFuse & relay box
H-15
White
Engine room ~ Chassis

H-18
White
Engine room ~ INST

H-48
White
Engine room ~ INST

P-1
Silver
Battery (+)

P-2
Silver
Relay & Fuse box

P-5
Silver
Battery (-)

P-6
Silver
Body ground



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5A-22 BRAKE CONTROL SYSTEM
System Components
Electronic Hydraulic Control Unit (EHCU), four W heel
Speed Sensors, two W arning Lamps, and G sensor.

Electronic Hydraulic Control Unit (EHCU)
The EHCU consists of ABS control circuits, fault
detector, and a fail-safe. It drives the EHCU according
to the signal from each sensor, cancelling ABS to return
to normal braking when a malfunction has occurred in
the ABS.
The EHCU has a self-diagnosing function which can
indicate faulty circuits during diagnosis.
The EHCU is mounted on the engine compartment rear
left side. It consists of a motor, solenoid valves and a
fail safe relay.
Solenoid Valves: Reduces or holds the caliper fluid
pressure for each front brake or both rear brakes
according to the signal sent from the EHCU.
Buffer chamber: Temporarily holds the brake fluid that
returns from the front and rear brake so that pressure of
front brake can be reduced smoothly.
Motor: Drives the pump according to the signal from
EHCU.
Fail safe Relay: W hen failure occurs in ABS.
The power supply to solenoid Valve is cut.

ABS Warning Lamp


RTW 75ASH000101
Vehicles equipped with the Anti-lock Brake System
have an amber “ABS” warning lamp on the instrument
panel. The “ABS” warning lamp will illuminate if a
malfunction in the Anti-lock Brake System is detected
by the Electronic Hydraulic Control Unit (EHCU). In the
case of an electronic malfunction, the EHCU will turn
“ON” the “ABS” warning lamp and disable the anti-lock
braking function.

The “ABS” warning lamp will turn “ON” for
approximately three seconds after the ignition switch is
in the “ON” position.
If the “ABS” warning lamp stays “ON” after the ignition
switch is in the “ON” position, or comes “ON” and stays
“ON” while driving, the Anti-lock Brake System should
be inspected for a malfunction according to the
diagnostic procedure.

Wheel Speed Sensor (WSS)
It consists of a sensor and a rotor. The sensor is
attached to the knuckle on the front wheels and to the
rear wheels.
The rotor is press-fit in the axle shaft.

G Sensor
The G sensor detects the vehicle deceleration speed
and sends a signal to the EHCU. In 4W D operation, all
four wheels may be decelerated in almost the same
phase, since all wheels are connected mechanically.
This tendency is noticeable, particularly on roads with
low friction coefficient, and the ABS control is adversely
affected.
The G sensor judges whether the friction coefficient of
the road surface is low or high, and changes the
EHCU's operating system to ensure ABS and EBD
control.

Normal and Anti-lock Braking
Under normal driving conditions, the Anti-lock Brake
System functions the same as a standard power
assisted brake system. However, with the detection of
wheel lock-up, a slight bump or kick-back will be felt in
the brake pedal. This pedal “bump” will be followed by a
series of short pedal pulsations which occurs in rapid
succession. The brake pedal pulsation will continue
until there is no longer a need for the anti-lock function
or until the vehicle is stopped. A slight ticking or popping
noise may be heard during brake applications when the
anti-lock feature is being used.
W hen the anti-lock feature is being used, the brake
pedal may rise even as the brakes are being applied.
This is also normal. Maintaining a constant force on the
pedal will provide the shortest stopping distance.




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ISUZU KB P190 2007