PS90 Diagnosis System
12
4.5.2.
Click
YES
to confirm the operation, if the communication is normal, it will
show
“
Trouble Codes Successfully Cleared
”
or
“
Trouble Codes Cleared
”
. Generally,
users will need to re-read trouble codes after clearing them to confirm that the
trouble codes have been cleared.
4.6. Read Live Data
System control units, or ECUs
send out operating parameters and working status of
various components in the form of an Electronic Signal, here Electronic Signal refers
to Live Data. Common Engine Live Data includes Engine Speed, Throttle Position
Sensor Voltage, Oxygen Sensor Voltage, Coolant Temperature, Spark Advance Angle,
Idle Speed Switch State, Intake Air Temperature, Intake Pressure, etc.
Tip: Live Data is important function that can be used to help technicians further
diagnose a problem. This function requires technicians to be familiar with sensor
data of each system, control signals and control modes. Tip: Save known good live
data readings for comparison.
(The following are some test conditions and typical values of common live data)
Test Items
Unit
Normal Data Test Conditions & Typical Values
1.Engine Speed
rpm
0-6000
Engine warmed-up:
750-850rpm
2.Engine Coolant
Temperature
℃
-40-150
Engine warmed-up: 85-95
℃
3.Throttle Percentage
0-100
Throttle closed:0%, Throttle
wide-open:
＞
85
4.Injecting Pulse Width ms
0-15
Engine warmed-up: 3.5-4.5ms
