2007 ISUZU KB P190 brake sensor

TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-157
Down Slope Mode
Condition for setting the down slope mode shift map;
All of the following conditions are met:
• Brake pedal switch is depressed
• Accelerator pedal is released
• Vehicle speed is more than 60 km/h (36 MPH)
• Increment of vehicle speed is more than 1 km/h (1 MPH) per second
• Selector lever is D or 3 range
Condition for canceling the down slope mode shift map;
Either of the following condition is met:
• Accelerator pedal is depressed
• Selector lever is other than D or 3 range Power Drive Mode
When the power drive switch is ON, the TCM switches
shift map to the power drive mode map and performs
gearshift control from 1st to 4th to gain more
acceleration compared with normal mode.
Up Slope Mode
Up slope reasoning value is calculated from the
averaged accelerator pedal angle and the averaged
acceleration. Otherwise, up slope reasoning value is
calculated from the vehicle speed. The TCM selects a
up slope mode when the former is bigger than the
latter.
Lock Up Control
Legend 1. TCC solenoid valve
2. Solenoid fluid pressure
3. Lock up control spool valve
4. Torque converter clutch (TCC) 5. Torque converter front cover
6. TCC engagement fluid pressure
7. TCC disengagement fluid pressure
TCM
Sensor inputs
Input shaft speed (ISS) sensor
Output shaft speed (OSS) sensor
Transmission fluid temperature (TFT) sensor
Accelerator pedal position signal (via ECM)
Engine speed signal (via ECM)
Solenoid valve outputsTorque converter clutch (TCC) solenoid valve

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ISUZU KB P190 2007

7A2-158 TRANSMISSION CONTROL SYSTEM (JR405E)
The TCM controls the torque converter clutch (TCC)
solenoid valve based on the accelerator pedal angle,
input shaft speed, output shaft speed and transmission
fluid temperature.
Smooth lock up control is employed to engage or
disengage the TCC smoothly at the time of lock up On
or Off. When the TCM determines the TCC
engagement, the solenoid valve control duty cycle
(pulse width modulation [PWM]) signal is gradually
increased (5% to 95%) and the transmission fluid
between the TCC piston and torque converter front
cover is gradually drained. As a result, the TCC piston
is fitted slowly to the torque converter front cover under
fluid pressure securing smooth lock up engagement. The lock up control does not start when the
transmission fluid temperature is less than 20 °C (68 °F)
even though the vehicle is at the lock up control speed
area. The lock up control disengages when the
accelerator pedal angle is released.
Direct Electronic Shift Control (DECS)
Legend 1. Oil pump
2. Pressure regulator spool valve
3. ON/ OFF type solenoid valve (pressure control [PC]
solenoid valve 4. Duty cycle type solenoid valve (shift solenoid valve)
5. Amplifier (AMP) valve
6. Clutch
Solenoid valve outputs
Pressure control (PC) solenoid valve
Low & reverse brake solenoid valve
2-4 brake solenoid valve
High clutch solenoid valve
Low clutch solenoid valve
TCM
Sensor inputsInput shaft speed (ISS) sensor
Output shaft speed (OSS) sensor
Transmission fluid temperature (TFT) sensor
Accelerator pedal position signal (via ECM)
Engine speed signal (via ECM)
Switch inputs
Low & reverse brake transmission fluid
pressure (TFP) switch
2-4 brake transmission fluid pressure (TFP)
switch
High clutch transmission fluid pressure (TFP)
switch

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ISUZU KB P190 2007

TRANSMISSION CONTROL SYSTEM (JR405E) 7A2-159
Based on each transmission fluid pressure (TFP)
switch signal and each speed sensor signal and the
accelerator pedal angle, the duty cycle type shift
solenoid valve adjusts the clutch pressure to match the
engine load and vehicle running conditions. Controlling
the engagement and disengagement of the clutch and
brake pressure is directly and accurately controlled via
TCM, which is different to the conventional accumulator
type. Instead of the conventional system (On/ Off type
shift solenoid valve and shift valve), the combination of
the duty cycle type solenoid valve and the amplifier
(AMP) valve are used to adjust the clutch pressure to
match the engine load and vehicle driving conditions,
based on the signal from the TCM. Also, the TFP
switch provided in the fluid passage of the control valve
transmits to TCM, enabling the engagement and
disengagement control of the clutch and brake to be
directly and finely. When the gear is shifted from the
2nd to 3rd, 3rd to 4th, 4th to 3rd and 3rd to 2nd, the
clutch pressures on the engagement side and
disengagement side are simultaneously controlled. As
a result, engine racing or clutch drag is prevented
which enables a smooth and quick shift response.
Learning Control
Solenoid valve outputs
Low & reverse brake solenoid valve
2-4 brake solenoid valve
High clutch solenoid valve
Low clutch solenoid valve
TCM
Sensor inputs Input shaft speed (ISS) sensor
Output shaft speed (OSS) sensor
Transmission fluid temperature (TFT) sensor
Accelerator pedal position signal (via ECM)
Engine speed signal (via ECM)
Switch inputs
Low & reverse brake transmission fluid
pressure (TFP) switch
2-4 brake transmission fluid pressure (TFP)
switch
High clutch transmission fluid pressure (TFP)
switch

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ISUZU KB P190 2007

7A3-16 ON-VEHICLE SERVICE (JR405E)
SOLENOIDS, OIL PRESSURE SWITCH AND OIL TEMPERATURE
SENSOR
244L300003
Legend
1. High clutch oil pressure switch connector
(wire color: Gray)
2. 2-4 brake oil pressure switch connector
(wire color: Brown)
3. Low and reverse brake oil pressure switch connector (wire color: W hite)
4. Low and reverse brake duty solenoid connector
(wire color: Pink and W hite)
5. High clutch duty solenoid connector
(wire color: Green and Gray)

6. Lock-up duty solenoid connector
(wire color: Yellow and Black)
7. 2-4 brake duty solenoid connector
(wire color: Blue and Brown)
8. Low clutch duty solenoid connector
(wire color: Orange and Black)
9. Line pressure solenoid connector
(wire color: Pink)




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ISUZU KB P190 2007

UNIT REPAIR (JR405E) 7A4-27

Spring specifications
No. Valve nomenclature Free length
(mm / in) Outside
diameter
(mm / in) Linear
diameter
(mm / in) Number of
coils
14 Pressure relief 49.0 / 1.929 7.6 / 0.299 1.1 / 0.043 17.3
15 Pressure regulator 30.5 / 1.201 14.0 / 0.551 1.4 / 0.055 5.7
16 Low and reverse brake fail (A) 22.0 / 0.866 7.0 / 0.276 0.6 / 0.024 10.0
17 Fail 23.0 / 0.906 11.0 / 0.433 0.5 / 0.020 13.2
18 Low and reverse brake amp 19.5 / 0.768 7.9 / 0.311 0.5 / 0.020 6.9
19 2 – 4 brake fail (A) 24.8 / 0.976 8.5 / 0.335 0.9 / 0.035 7.8
20 Low clutch amp (B) 26.0 / 1.024 11.0 / 0.433 0.5 / 0.020 6.9
21
Torque converter relief More than 47.2
/ 1.858 9.2 / 0.362 1.6 / 0.063 20.2
22 2 – 4 brake solenoid accumulator 31.4 / 1.236 9.8 / 0.386 1.3 / 0.051 9.3
23 High clutch accumulator
51.0 / 2.008 6.5 / 0.256 0.8 / 0.031 23.5

Oil pressure switch
Apply compressed air (390 kPa/4.0 kgf/cm2/57 psi) to the oil
pressure switch to check the oil pressure switch continuity
between the connector and screw.






244L300011

Oil temperature sensor (harness assembly)
Check the oil temperature sensor resistance between harness
terminals 7 and 6 (ground).

Oil temperature sensor resistance: 2,400 ～
～～
～
2,600 ohms
(20 °
°°
°
C)


Solenoids
Measure the resistance of each solenoid.

Resistance:
Brown connector – 3.0 ∼
∼∼
∼
3.4 ohms (20 °
°°
°
C)
Gray connector – 12.0 ∼
∼∼
∼
13.2 ohms (20 °
°°
°
C)
White connector – 12.2 ∼
∼∼
∼
13.4 ohms (20 °
°°
°
C)

Reassembly steps
• Coat the parts with ATF before installing them.
• Install the control valve to the control valve lower body.
• Install the oil filter to the control valve lower body.



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ISUZU KB P190 2007

ELECTRICAL-BODY AND CHASSIS 8A-365




Connector
Ter- No.

minal No.
B23
1 Power ground
2 Cruise main
3 Charge
4 Brake
5 ABS control unit
6 Fuel consumption
7 Tachometer pulse
8 Speedometer pulse
9 Rheostat
10 Taillight relay
11 -
12 -
13 Ambient temperature sensor
14 Seat belt
15 Key remind switch
16 Engine coolant temperature sensor
17 Fuel gauge unit and sender
18 Fuel level
19 Sedimenter
20 Door ajar
21 Power drive
22 3rd start
23 Fuel filter
24 Cruise set
25 Check trans
26 SVS
27 4W D
28 4W D - L
29 A/T oil temperature
30 Check 4W D
31 CAN (+)
32 CAN (-)
33 Turn signal - LH
34 ABS
35 Glow
36 -
37 Hi – beam (+)
38 Check engine
39 Oil pressure
40 SRS control unit

Connector
Ter- No.
minal No.
B24
1 Signal ground
2 SRS ground
3 A/T shift indicator “3”
4 A/T shift indicator “D”
5 A/T shift indicator “N”
6 A/T shift indicator “R”
7 A/T shift indicator “P”
8 Ignition
9 Ambient temperature sensor
10 RR fog light
11 FRT fog light
12 A/T shift indicator “2”
13 A/T shift indicator “L”
14 Turn signal - RH
15 Door SW - driver
16 Power source



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8A-366 ELECTRICAL-BODY AND CHASSIS


Connector No. B23 SOUTH
AFRICA SAUDI
ARABIA ISRAEL EUROPE OTHER
Terminal Connector place
4JJ1-TC HFV6 4JA1T(L) HFV6 4JJ1-TC HFV6 RHD LHD G.EXP
RHD 4JJ1-TC
C24SE
AUSTRALIAHFV6AUSTRALIA
1
Power ground
2 Cruise main
―
― ― ― ― ― ― ― ― ―
3
Charge
4 Brake
5 ABS control unit
6 Fuel consumption ―
―
―
―
―
7 Tachometer pulse
8 Speedometer pulse
9 Rheostat
10 Taillight relay
11 ―

― ― ― ― ― ― ― ― ― ― ― ―
12 ―

― ― ― ― ― ― ― ― ― ― ― ―
13 Ambient
temperature sensor ―

14 Seat belt
15 Key remind switch
16 Engine coolant
temperature sensor
17 Fuel gauge unit and
sender
18 Fuel level
― ― ― ― ― ― ― ― ― ― ― ―
19 Sedimenter ―
―
―
―
―
20 Door ajar
― ― ― ― ― ― ― ― ― ― ―
21 Power drive ―

22 3rd start ―

23 Fuel filter ―
―
―
―
―
24 Cruise set
― ―
―
―
―
―
25 Check trans ―

26 SVS ―

27 4W D ―

28 4W D - L ―

29 A/T oil temperature ―

30 Check 4W D ―

31 CAN (+)
― ― ―
―
―
― ― ―
32
CAN (-)
― ― ―
―
―
― ― ―
33
Turn signal - LH
34 ABS
35 Glow ―
―
―
―
―
36 ―

― ― ― ― ― ― ― ― ― ― ― ―
37 Hi – beam (+)
38 Check engine
39 Oil pressure
40 SRS control unit


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ELECTRICAL-BODY AND CHASSIS 8A-369
Low Fuel Indicator Light
1. Disconnect the fuel gauge unit wire connector.
2. Turn the key switch on. Check that the bulb lights.
If operation is not correct, remove and check the bulb or circuit.
or If check whether low fuel turns on fuel input (B-24) at the
time of open and key on.
∗ meter is check at low fuel



RTW 78ASH001501




Check level sensor operation
1. Remove the fuel gauge unit.
2. Apply battery voltage between terminal (B) and (C) through a 1.12 watt bulb. Check that the bulb lights.
Note:
It will take a short time for the bulb light.
3. Submerge the sensor in fuel. Check that the bulb goes out.
If operation is not correct, replace the fuel tank unit.

BRAKE SYSTEM WARNING LIGHT
The brake system warning light comes on while the parking
brake is set and the engine run position.

RTW 48AMH000101


Note:
The parking brake indicator light circuit is designed to
prevent driving of the vehicle with the parking brake on.
It does not indicate the condition of the parking brake
system.

The parking brake switch is in parallel with the brake fluid
switch.


The brake system warning light also comes on when reservoir
brake fluid level falls below the specified limit with the parking
brake released and the engine run position.

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