Intake Air Temp (Volts)
Range: 0 to 5 Volts
Displays the voltage of the temperature sensor which measures the
temperature of the air flowing into the manifold.
Loop Status (Open/Closed)
If the loop status is OPEN, this means that the air/fuel mixture is being
controlled by ECM tables or sensors other than the oxygen sensor. This
is the case in a cold start condition, for example. When the engine coolant
temperature sensor reaches a certain temperature (which depends on
engine controller type) the loop status should transition to CLOSED. In
closed loop, the air/fuel mixture is controlled by the oxygen sensor.
Low Speed Fan (On/Off)
The low speed fan is used in extreme conditions for transverse mounted
engines. The screen should indicate ON if the ECM is commanding the
low speed fan ON. If the ECM is commanding the fan OFF, the screen
should indicate OFF.
Oxygen Sensor (Volts)
Range: 0 to 5 Volts
The oxygen sensor generates an input voltage corresponding to the
amount of oxygen in the exhaust. The oxygen sensor must reach a
certain temperature before the readings are accurate. In closed loop (see
Loop Status) the ECM will use this sensor for air/fuel mixture adjustments.
If the reading is out-of-range of conversion the display will read INVALID.
Park/Neutral (Yes/No)
The screen should indicate YES if the transmission selector is in either
Park or Neutral. If the selector is in any other state, the screen should
indicate NO. Applies only for vehicles equipped with automatic
transmissions.
Power Steering PSI High (Yes/No)
This output state should indicate YES if the power steering pump is
active. If the steering system is inactive, the screen should indicate NO.
Spark Advance (°BTDC)
Range: -90° to +90°
Base electrical spark advance as determined by the ECM. Displayed in
degrees of crankshaft rotation.
Throttle Position (Volts)
Range: 0 to 5 Volts
This reads the voltage from the Throttle Position Sensor.
Vehicle Power (Volts)
Range: 0 to 16 Volts
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Summary of Contents for EX-SCAN 5000
Page 1: ...USERS MANUAL...
Page 95: ...NOTES Page 95...
Page 96: ...NOTES Page 96...
Page 97: ...NOTES Page 97...