Isuzu KB P190. Manual - part 416

ENGINE CONTROL SYSTEM (4JK1/4JJ1)   6E-47

Scan Tool Data List

The Engine Scan Tool Data List contains all engine
related parameters that are available on the scan tool.
A given parameter may appear in any one of the data
lists, and in some cases may appear more than once,
or in more than one data list in order to group certain
related parameters together. Use the Engine Scan Tool
Data List only after the following is determined:

• The Engine Controls - Diagnostic System Check is

completed.

• On-board diagnostics are functioning properly.

Scan tool values from a properly running engine may
be used for comparison with the engine you are
diagnosing. The Engine Scan Tool Data List represents
values that would be seen on a normal running engine.
Only the parameters listed below are referenced in this
service manual for use in diagnosis.

Scan Tool Parameter

Units Displayed

Typical Data Value at Engine Idle

Typical Data Value at 2000RPM

Operating Conditions: Engine idling or 2000RPM/ Engine coolant temperature is between 75 to 85

°C (167 to 185°F)/

Accelerator pedal is constant/ Neutral or Park/ Accessories OFF/ Vehicle located at sea level

Engine Speed

RPM

Nearly 700 RPM

Nearly 2000 RPM

Desired Engine Idle Speed

RPM

700 RPM

700 RPM

Calculated Engine Load

%

-

-

Coolant Temperature

°C/ °F

75 to 85 

°C/  167 to 185°F

75 to 85 

°C/  167 to 185°F

Engine Coolant Temperature 

Sensor

Volts

0.4 to 0.6 volts

0.4 to 0.6 volts

Intake Air Temperature

°C/ °F

20 to 40 

°C/ 68 to 104 °F

20 to 40 

°C/ 68 to 104 °F

Intake Air Temperature Sensor

Volts

1.4 to 2.3 volts

1.4 to 2.3 volts

Fuel Temperature

°C/ °F

20 to 60 

°C/ 68 to 140 °F

20 to 60 

°C/ 68 to 140 °F

Fuel Temperature Sensor

Volts

0.8 to 2.3 volts

0.8 to 2.3 volts

MAF (Mass Air Flow)

g/sec

300 to 600 g/sec

200 to 600 g/sec

MAF Sensor (Mass Air Flow)

Volts

1.2 to 1.6 volts

2.0 to 2.7 volts

Barometric Pressure

kPa/psi

Nearly 100 kPa/ 14.5 psi at sea 

level

Nearly 100 kPa/ 14.5 psi at sea 

level

Barometric Pressure Sensor

Volts

Nearly 2.3 volts at sea level

Nearly 2.3 volts at sea level

Turbocharger Solenoid 

Command

%

50 to 60 %

50 to 60 %

Desired Boost Pressure

kPa/ psi

Nearly 100 kPa/ 14.5 psi at sea 

level

Less than 120 kPa/ 17.4 psi

Boost Pressure

kPa/ psi

Nearly 100 kPa/ 14.5 psi at sea 

level

Less than 120 kPa/ 17.4 psi

Boost Pressure Sensor

Volts

Nearly 1.0 volt

Less than 1.3 volts

Desired Fuel Rail Pressure

MPa/ psi

30 MPa/ 4,350 psi

More than 70 MPa/ 10,200 psi 

(4JJ1 Euro 4 specification) 

More than 50 MPa/ 7,250 psi 

(4JJ1 except Euro 4 

specification) 

More than 60 MPa/ 8,700 psi 

(4JK1)

Fuel Rail Pressure

MPa/ psi

27 to 33 MPa/ 3,900 to 4,800 psi

More than 70 MPa/ 10,200 psi 

(4JJ1 Euro 4 specification) 

More than 50 MPa/ 7,250 psi 

(4JJ1 except Euro 4 

specification) 

More than 60 MPa/ 8,700 psi 

(4JK1)

6E-48   ENGINE CONTROL SYSTEM (4JK1/4JJ1)

Fuel Rail Pressure Sensor

Volts

1.4 to 1.5 volts

More than 2.1 volts (4JJ1 Euro 4 

specification) 

More than 1.8 volts (4JJ1 except 

Euro 4 specification) 

More than 1.9 volts (4JK1)

FRP Regulator Command (Fuel 

Rail Pressure)

%

35 to 50 %

35 to 45 %

FRP Regulator Commanded Fuel 

Flow

mm

3

/sec

More than 1,000 mm

3

/sec

More than 2,000 mm

3

/sec

FRP Regulator Feedback (Fuel 

Rail Pressure)

mA

1,600 to 2,000 mA

1,500 to 1,800 mA

Accelerator Pedal Position

%

0%

10 to 25 %

APP Sensor 1 (Accelerator Pedal 

Position)

Volts

0.2 to 1.0 volts

1.0 to 1.7 volts

APP Sensor 2 (Accelerator Pedal 

Position)

Volts

3.8 to 4.6 volts

3.3 to 3.9 volts

APP Sensor 3 (Accelerator Pedal 

Position)

Volts

3.8 to 4.6 volts

3.7 to 4.0 volts

EGR Solenoid Command

%

Less than 30 %

Less than 30 %

Desired EGR Position

%

Less than 70 %

Less than 80 %

EGR Position

%

Less than 70 %

Less than 80 %

EGR Position Sensor

Volts

Less than 2.9 volts

Less than 3.1 volts

Intake Throttle Solenoid 

Command

%

Less than 30 %

Less than 40 %

Desired Intake Throttle Position

%

Less than 30 %

Less than 80 %

Intake Throttle Position

%

Less than 30 %

Less than 80 %

Intake Throttle Position Sensor

Volts

Less than 1.6 volts

Less than 3.3 volts

Desired Injection Quantity

mm

3

7 to 12 mm

3

7 to 12 mm

3

Main Injection Quantity

mm

3

3 to 8 mm

3

5 to 10 mm

3

Main Injection Timing

°CA

2 to 12 

°CA

0 to 10 

°CA

Main Injection On Time

ms

600 to 800 ms

400 to 550 ms

Pre Injection Quantity

mm

3

1 to 4 mm

3

2 to 4 mm

3

Pre Injection Interval

°CA

3 to 20 

°CA

10 to 30 

°CA

Fuel Compensation Cyl. 1

mm

3

-5.0 to 5.0 mm

3

 (varies)

0.0 mm

3

Fuel Compensation Cyl. 2

mm

3

-5.0 to 5.0 mm

3

 (varies)

0.0 mm

3

Fuel Compensation Cyl. 3

mm

3

-5.0 to 5.0 mm

3

 (varies)

0.0 mm

3

Fuel Compensation Cyl. 4

mm

3

-5.0 to 5.0 mm

3

 (varies)

0.0 mm

3

Cylinder Balancing Update

Enabled/ Disabled

Enabled

Disabled

Fuel Supply Pump Status

Not Learn/ 

Learning/ Learned

Learning or Learned

Learning or Learned

Rail Pressure Feedback Mode

Wait Mode/ 

Feedback Mode/ 

Shutoff Mode

Feedback Mode

Feedback Mode

Engine Running Status

Off/ Ignition On/ 

Cranking/ Running

Running

Running

Scan Tool Parameter

Units Displayed

Typical Data Value at Engine Idle

Typical Data Value at 2000RPM

ENGINE CONTROL SYSTEM (4JK1/4JJ1)   6E-49

Cam/ Crank Sensor Signal 

Synchronization Status

Asynchronous/ No 

Crank Signal/ 

Synchronous

Synchronous

Synchronous

Engine Runtime

Time (hour: 

minute: second)

Varies

Varies

Vehicle Speed

km/h / MPH

0 km/h / 0 MPH

0 km/h / 0 MPH

Transmission Gear

Out of gear/ 1st/ 

2nd/ 3rd/ 4th/ 5th

Out of gear

Out of gear

Starter Switch

On/Off

On

On

Ignition Switch

On/Off

On

On

Ignition Voltage

Volts

11.0 to 15.0 volts

11.0 to 15.0 volts

Battery Voltage

Volts

11.0 to 15.0 volts

11.0 to 15.0 volts

Fuel Pump Relay Command

On/ Off

On

On

Swirl Control Solenoid Command

On/ Off

On

On

Fuel Filter Switch

On/ Off

On

On

A/C Request Signal

On/ Off

Off

Off

A/C Relay Command

On/ Off

Off

Off

Park/ Neutral Switch

Neutral/ In Gear

Neutral

Neutral

Glow Relay Command

On/ Off

Off

Off

Glow Plug Lamp Command

On/ Off

Off

Off

Brake Switch 1

Applied/ Released

Released

Released

Brake Switch 2

Applied/ Released

Released

Released

Clutch Pedal Switch

Applied/ Released

Released

Released

Cruise Main Lamp Command

On/ Off

Off

Off

Cruise Main Switch

On/ Off

Off

Off

Cruise Cancel Switch

On/ Off

On

On

Cruise Resume Switch

On/ Off

Off

Off

Cruise Set Switch

On/ Off

Off

Off

MIL Command (Malfunction 

Indicator Lamp)

On/ Off

Off

Off

SVS Lamp Command (Service 

Vehicle Soon)

On/ Off

Off

Off

Limp Home Mode

None/ 1/ 2/ 3/ 4

None

None

Distance While MIL is Activated

km/ Mile

0 km/ 0 Mile

0 km/ 0 Mile

Engine Runtime With MIL Active

minutes

0

0

Total Engine Overspeed Event

Counter

Varies

Varies

Total Engine Coolant 

Overtemperature Event

Counter

Varies

Varies

Total Fuel Temperature 

Overtemperatrure Event

Counter

Varies

Varies

Total Intake Air Temperature 

Overtemperaure Event

Counter

Varies

Varies

Immobilizer Function 

Programmed

Yes/ No

Yes

Yes

Wrong Immobilizer Signal

Yes/ No

No

No

Scan Tool Parameter

Units Displayed

Typical Data Value at Engine Idle

Typical Data Value at 2000RPM

6E-50   ENGINE CONTROL SYSTEM (4JK1/4JJ1)

Scan Tool Data Definitions

This information will assist in emission or driveability
problems. The displays can be viewed while the vehicle
is being driven. Always perform the Diagnostic System
Check - Engine Controls first. The Diagnostic System
Check will confirm proper system operation.

Engine Speed
This parameter displays the rotational speed of the
crankshaft as calculated by the ECM based on inputs
from the crankshaft position (CKP) sensor or camshaft
position (CMP) sensor.

Desired Idle Speed
This parameter displays the idle speed requested by
the ECM. The ECM will change desired idle speed
based on engine coolant temperature and other inputs.

Calculate Engine Load
This parameter displays the engine load in percent
based on inputs to the ECM from various engine
sensors. The scan tool will display a lower percentage
when the engine is at idle with little or no load. The
scan tool will display a higher percentage when the
engine is running at high engine speed under a heavy
load.

Coolant Temperature
This parameter displays the temperature of the engine
coolant as calculated by the ECM using the signal from
the engine coolant temperature (ECT) sensor. The
scan tool will display a low temperature when the ECT
sensor signal voltage is high, and a high temperature
when the ECT sensor signal voltage is low.

Engine Coolant Temperature Sensor
This parameter displays the voltage signal sent to the
ECM from the engine coolant temperature (ECT)
sensor. ECT sensor is a range of value indicating a low
voltage when the temperature is high, and a high
voltage when the temperature is low.

Intake Air Temperature
This parameter displays the temperature of the intake
air as calculated by the ECM using the signal from the
intake air temperature (IAT) sensor.  The scan tool will
display a low temperature when the IAT sensor signal
voltage is high, and a high temperature when the IAT
sensor signal voltage is low.

Intake Air Temperature Sensor 
This parameter displays the voltage signal sent to the
ECM from the intake air temperature (IAT) sensor.  IAT
sensor is a range of value indicating a low voltage
when the temperature is high, and a high voltage when
the temperature is low.

Fuel Temperature 
This parameter displays the temperature of the fuel as
calculated by the ECM using the signal from the fuel
temperature (FT) sensor.  The scan tool will display a
low temperature when the FT sensor signal voltage is
high, and a high temperature when the FT sensor
signal voltage is low.

Fuel Temperature Sensor
This parameter displays the voltage signal sent to the
ECM from the fuel temperature (FT) sensor.  FT sensor
is a range of value indicating a low voltage when the
temperature is high, and a high voltage when the
temperature is low.

MAF (Mass Air Flow)
This parameter displays the air flow into the engine as
calculated by the ECM based on the mass air flow
(MAF) sensor input. The scan tool will display a high
value at higher engine speeds, and a low value at lower
engine speed.

MAF Sensor (Mass Air Flow)
This parameter displays the voltage signal sent to the
ECM from the mass air flow (MAF) sensor. MAF sensor
is a range of value indicating a low voltage at lower
engine speed, and a high voltage at a higher engine
speeds.

Barometric Pressure 
This parameter displays the barometric pressure
(BARO) as calculated by the ECM using the signal from
the BARO sensor.  The scan tool will display a low
barometric pressure in high altitude area.

Barometric Pressure Sensor 
This parameter displays the voltage signal sent to the
ECM from the barometric pressure (BARO) sensor.
BARO sensor is a range of value indicating a low
voltage in high altitude area, and a middle voltage in
sea level.

Immobilizer Signal

Yes/ No

Yes

Yes

Security Wait Time

Inactive/ Time 
(hour: minute: 

second)

Inactive

Inactive

Scan Tool Parameter

Units Displayed

Typical Data Value at Engine Idle

Typical Data Value at 2000RPM