Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 114
6E–60
4JH1 ENGINE DRIVEABILITY AND EMISSIONS
TYPICAL SCAN DATA & DEFINITIONS (ENGINE DATA)
Use the Typical Values Table only after the On-Board Diagnostic System Check has been completed, no DTC(s) were
noted, and you have determined that the on-board diagnostics are functioning properly. Tech 2 values from a
properly-running engine may be used for comparison with the engine you are diagnosing.
Condition : Vehicle stopping, engine running, air conditioning off & after warm-up (Coolant temperature approximately
80 deg.)
Tech 2 Parameter
Units
Idle
1500rpm
2000rpm
Description
1
Engine Speed
rpm
675 - 725
1475 - 1525
1975 - 2025
The engine speed is measured by ECM from the CKP
sensor.
2
Vehicle
Speed
km/h
0
0
0
This displays vehicle speed. The vehicle speed is
measured by ECM from the vehicle speed sensor.
3
Pump Speed
rpm
335 - 375
725 - 775
975 - 1025
This displays injection pump speed. The injection speed
is measured by ECM from the pump cam sensor.
4
Accelerator
Position Signal
Value of ( ) shows
A/T model
%
0
(0)
3 - 6
(4 - 7)
5 - 8
(8 - 11)
Throttle position operating angle is measured by the
ECM from throttle position output voltage. This should
display 0% at idle and 99 - 100% at full throttle.
5
Idle Switch
Active/ Inactive
Active
Active
Inactive
This displays operating status of the idle switch. This
should display “Active” when the idle condition.
6
Mass Air Flow
Sensor
Value of ( ) shows
A/T model
mg/strk
410 - 490
(730 - 785)
380 - 450
(700 - 780)
400 - 480
(780 - 830)
This displays intake air amount. The mass air flow is
measured by ECM from the MAF sensor output voltage.
7
Barometric
Pressure
hpa
990 - 1015
990 - 1015
990 - 1015
The barometric pressure is measured by ECM from the
sensor in the ECM. This data is changing by altitude.
8
Desired Injection
Quantity
Value of ( ) shows
A/T model
mg/stk
5 - 8
(10 - 16)
5 - 9
(8 - 12)
6 - 10
(9 - 13)
This displays commanded value from the ECM. The ECM
compensates for fuel rate to basic rate.
9
Injection Quantity
Value of ( ) shows
A/T model
mg/stk
6 - 8
(10 - 16)
6 - 9
(8 - 12)
7 - 10
(9 - 13)
This displays actual fuel quantity. The PSG controls high
pressure solenoid valve to meet commanded value from
the ECM.
10
Desired Fuel
Injection Start
°CA
1 - 3
2 - 4
3 - 6
This displays commanded value from the ECM. The ECM
compensates for fuel injection timing by throttle position
and various sensor signal.
11
Actual Injection
Start
°CA
1 - 3
2 - 4
3 - 6
This displays actual injection timing value controlled by
the TCV. The TCV controls duty ratio to meet
commanded value from the PSG.
12
Coolant
Temperature
°C
80 - 85
80 - 85
80 - 85
The ECT is measured by ECM from ECT sensor output
voltage. This data is changing by coolant temperature.
When the engine is normally warm upped, this data
displays approximately 80 deg.
13
Fuel Temperature
°C
25 - 50
25 - 50
25 - 50
The FT is measured by PSG from FT sensor. This data is
changing by fuel temperature.
14
Intake Air
Temperature
°C
25 - 50
25 - 50
25 - 50
The IAT is measured by ECM from IAT sensor output
voltage. This data is changing by intake air temperature.
15
Ignition Status
On12V/ Off0V
On 12V
On 12V
On 12V
This displays the key switch status indicated by the ECM
with key switch signal. This should display “Off 0V” at key
OFF and “On12V” at key ON.
16
Brake Switch 1
Active/ Inactive
Inactive
Inactive
Inactive
This displays operating status of the brake switch 1. This
should display “Active” when the brake pedal is stepped
on.
17
Brake Switch 2
Active/ Inactive
Inactive
Inactive
Inactive
This displays operating status of the brake switch 2. This
should display “Active” when the brake pedal is stepped
on.
18
Clutch Switch
Value of ( ) shows
A/T model
Active/ Inactive
Inactive
( - )
Inactive
( - )
Inactive
( - )
This displays operating status of the clutch switch. This
should display “Active” when the clutch pedal is stepped
on.
19
Neutral Switch
On/Off
On
On
On
This displays operating status of the neutral switch. This
should display “On” when the gear position is neutral.