Isuzu KB P190. Manual — part 951

Automatic Transmission – 4L60E – Electrical Diagnosis

Page 7C2–18

Tech 2 Parameter

Units Displayed

Typical Data Value

Transmission Fluid Temp

°C

Varies

Estimated Gear Ratio

Ratio

8.00:1

Transmission Hot Mode

On / Off

Off

1-2 Shift Data

Once this mode is selected, displays specific parameter information about the 1-2 shift solenoid valve and its circuits.

1-2 Shift Data Parameters

For definitions of the parameters in this table, refer to 3.3

Tech 2 Data Definitions.

Tech 2 Parameter

Units Displayed

Typical Data Value

Shift Solenoid A

On / Off

Varies

Shift Solenoid B

On / Off

Varies

Commanded Gear

1,2,3,4

1

1-2 Shift Time

Seconds

Varies

1-2 Shift Error

Seconds

Varies

Shift Solenoid A Circuit

Open or Shorted / Short to Battery /

Okay

Okay

Throttle Position

Percent

Varies

Engine Speed

RPM

Varies

AT Input Speed

N/A

N/A

AT Output Speed

RPM

Varies

Vehicle Speed

km/h

0

Estimated Gear Ratio

Ratio

8.00:1

2-3 Shift Data

Once this mode is selected, displays specific parameter information about the 2-3 shift solenoid valve and its circuits.

2-3 Shift Data Parameters

For definitions of the parameters in this table, refer to 3.3

Tech 2 Data Definitions.

Tech 2 Parameter

Units Displayed

Typical Data Value

Shift Solenoid A

On / Off

Varies

Shift Solenoid B

On / Off

Varies

Commanded Gear

1,2,3,4

1

2-3 Shift Time

Seconds

Varies

2-3 Shift Error

Seconds

Varies

Shift Solenoid B Circuit

Open or Shorted / Short to Battery /

Okay

Okay

Throttle Position

Percent

Varies

Engine Speed

RPM

Varies

AT Input Speed

N/A

N/A

AT Output Speed

RPM

Varies

Automatic Transmission – 4L60E – Electrical Diagnosis

Page 7C2–19

Tech 2 Parameter

Units Displayed

Typical Data Value

Vehicle Speed

km/h

0

Estimated Gear Ratio

Ratio

8.00:1

3-4 Shift Data

Once this mode is selected, displays information on 3-4 shift timing.

3-4 Shift Data Parameters

For definitions of the parameters in this table, refer to 3.3

Tech 2 Data Definitions.

Tech 2 Parameter

Units Displayed

Typical Data Value

Shift Solenoid A

On / Off

Varies

Shift Solenoid B

On / Off

Varies

Commanded Gear

1,2,3,4

1

3-4 Shift Time

Seconds

Varies

3-4 Shift Error

Seconds

Varies

Throttle Position

Percent

Varies

Engine Speed

RPM

Varies

AT Input Speed

N/A

N/A

AT Output Speed

RPM

Varies

Vehicle Speed

km/h

0

Estimated Gear Ratio

Ratio

8.00:1

3-2 Downshift Data

Once this mode is selected, displays information on 3-2 downshift timing.

3-2 Downshift Data Parameters

For definitions of the parameters in this table, refer to 3.3

Tech 2 Data Definitions.

Tech 2 Parameter

Units Displayed

Typical Data Value

3-2 Downshift Solenoid

On / Off

Varies

Commanded Gear

1,2,3,4

1

3-2 Downshift Solenoid Circuit

Open or Shorted / Short to Battery /

Okay

Okay

Throttle Position

Percent

Varies

Engine Speed

RPM

Varies

AT Input Speed

N/A

N/A

AT Output Speed

RPM

Varies

Vehicle Speed

km/h

0

Estimated Gear Ratio

Ratio

8.00:1

Pressure Control Solenoid Data

Displays specific parameter information about the PC solenoid and its circuits.

Automatic Transmission – 4L60E – Electrical Diagnosis

Page 7C2–20

Pressure Control Solenoid Data Parameters

For definitions of the parameters in this table, refer to 3.3

Tech 2 Data Definitions.

Tech 2 Parameter

Units Displayed

Typical Data Value

PCS Actual Current

Amps

Varies (0.1 – 1.1 A)

PCS Desired Current

Amps

Varies (0.1 – 1.1 A)

PCS Duty Cycle

Percent

Varies

Engine Speed

RPM

Varies

Transmission Fluid Temp

°C

Varies

Throttle Position

Percent

Varies

Vehicle Speed

km/h

0

Commanded Gear

1,2,3,4

1

Transmission Adapts

Once this is selected, it has further sub menus.

1-2 Adapt Data

In this mode Tech 2 continuously monitors and displays 1-2 TAP cell data parameters.

1-2 Adapt Data Parameter

For definitions of the parameters in this table, refer to 3.3

Tech 2 Data Definitions.

Tech 2 Parameter

Units Displayed

Typical Data Value

1-2 Shift Time

Seconds

Varies

1-2 Shift Error

Seconds

Varies

Current TAP Cell

4-16

Varies

Throttle Position

Percent

Varies

1-2 Tap Cell (1 – 17)

kPa

Varies

2-3 Adapt Data

In this mode Tech 2 continuously monitors and displays 2-3 TAP cell data parameters.

2-3 Adapt Data Parameters

For definitions of the parameters in this table, refer to 3.3

Tech 2 Data Definitions.

Tech 2 Parameter

Units Displayed

Typical Data Value

2-3 Shift Time

Seconds

Varies

2-3 Shift Error

Seconds

Varies

Current TAP Cell

4-16

Varies

Throttle Position

Percent

Varies

2-3 Tap Cell (1 – 17)

kPa

Varies

3-4 Adapt Data

In this mode Tech 2 continuously monitors and displays 3-4 TAP cell data parameters.

3-4 Adapt Data Parameters

For definitions of the parameters in this table, refer to 3.3

Tech 2 Data Definitions.

Automatic Transmission – 4L60E – Electrical Diagnosis

Page 7C2–21

Tech 2 Parameter

Units Displayed

Typical Data Value

3-4 Shift Time

Seconds

Varies

3-4 Shift Error

Seconds

Varies

Current TAP Cell

4-16

Varies

Throttle Position

Percent

Varies

3-4 Tap Cell (1 – 17)

kPa

Varies

Steady State Adapt Data

In this mode TECH 2 continuously monitors and displays Steady State TAP data parameters.

Steady State Adapt Data Parameters

For definitions of the parameters in this table, refer to 3.3

Tech 2 Data Definitions.

Tech 2 Parameter

Units Displayed

Typical Data Value

Current TAP Cell

4-16

Varies

Throttle Position

Percent

Varies

Gear (1-4) TAP Cell

kPa

Varies

TCC (1-4) TAP Cell

kPa

Varies

Reverse Gear TAP Cell

kPA

Varies

3.3

Tech 2 Data Definitions

1-2 Shift Error: This parameter displays the difference between the desired 1-2 shift time and the actual 1-2 shift time. A
positive number indicates a firm or fast shift and the actual shift time was shorter than the desired shift time. A negative
number indicates a soft or slow shift and the actual shift time was longer than the desired shift time. This value is only
accurate if the shift was adaptable.

1-2 Shift Time: This parameter displays the actual time of the last 1-2 shift. The shift time is based on the engine r.p.m.
drop after the commanded 1-2 shift. This value is only accurate if the shift was adaptable.

1-2 TAP Cell (1-17): This parameter displays the amount of transmission adaptive pressure (TAP), based on 17 Nm of
engine torque increment per cell, added to or subtracted from shift pressure during a 1-2 upshift. A positive number
indicates that long shifts have been detected and PC solenoid pressure has been added to decrease shift time. A
negative number indicates that short shifts have been detected and PC solenoid pressure has been subtracted to
increase shift time.

2-3 Shift Error: This parameter displays the difference between the desired 2-3 shift time and the actual 2-3 shift time. A
positive number indicates a firm or fast shift, the actual shift time was shorter than the desired shift time. A negative
number indicates a soft or slow shift, the actual shift time was longer than the desired shift time. This value is only
accurate if the shift was adaptable.

2-3 Shift Time: This parameter displays the actual time of the last 2-3 shift. The shift time is based on the engine r.p.m
drop after the commanded 2-3 shift. This value is only accurate if the shift was adaptable.

2-3 TAP Cell (1-17): This parameter displays the amount of transmission adaptive pressure (TAP), based on 17 Nm of
engine torque increment per cell, added to or subtracted from shift pressure during a 2-3 upshift. A positive number
indicates that long shifts have been detected and PC solenoid pressure has been added to decrease shift time. A
negative number indicates that short shifts have been detected and PC solenoid pressure has been subtracted to
increase shift time.

3-4 Shift Error: This parameter displays the difference between the desired 3-4 shift time and the actual 3-4 shift time. A
positive number indicates a firm or fast shift, the actual shift time was shorter than the desired shift time. A negative
number indicates a soft or slow shift, the actual shift time was longer than the desired shift time. This value is only
accurate if the shift was adaptable.

3-4 Shift Time: This parameter displays the actual time of the last 3-4 shift. The shift time is based on the engine r.p.m.
drop after the commanded 3-4 shift. This value is only accurate if the shift was adaptable.

3-4 TAP Cell (1-17): This parameter displays the amount of transmission adaptive pressure (TAP), based on 17 Nm of
engine torque increment per cell, added to or subtracted from shift pressure during a 3-4 upshift. A positive number
indicates that long shifts have been detected and PC solenoid pressure has been added to decrease shift time. A