Scan Tool Data Definitions

Coolant Level Switch: The scan tool displays OK/Low. The scan tool displays Low when the PCM detects that the engine coolant level is low.

ECT Sensor: The scan tool displays -39 to +140°C (-38 to +284°F). The PCM monitors the voltage at the signal circuit of the engine coolant temperature sensor. The voltage is inversely proportional to the engine coolant temperature.

ECT Sensor: The scan tool displays volts. The PCM monitors the voltage at the signal circuit of the engine coolant temperature sensor. The voltage is inversely proportional to the engine coolant temperature.

Engine Oil Level Switch: The scan tool displays OK/Low. The scan tool displays Low when the engine oil level is low.

Engine Oil Life Remaining: The scan tool displays 0 to 100%. This represents the engine oil life index that is calculated and maintained by the PCM.

Engine Speed: The scan tool displays 0-9999 RPM. Engine speed is computed by the PCM from the 3X reference input. It should remain close to desired idle under various engine loads with the engine idling.

Fuel Level Sensor: The scan tool displays 0 to 5 volts. The PCM monitors the fuel level sensor signal circuit where 0 V is empty tank.

Fuel Level Sensor Rear: The scan tool displays 0 to 5 volts. The PCM monitors the rear fuel level sensor signal circuit where 0 V is empty tank.

Fuel Tank Level Remaining: The scan tool displays gallons (liters). This is the amount of fuel remaining in the fuel tank as calculated by the PCM based on the fuel level sensor signal circuit.

Fuel Tank Level Remaining: The scan tool displays 0 to 100%. The scan tool displays in percentage the amount of fuel remaining in the fuel tank as calculated by the PCM based on the fuel level sensor signal circuit.

Ignition 1 Signal: The scan tool displays voltage. This is the system voltage as detected by the PCM.

Low Oil Lamp Command: The scan tool displays On/Off. When the PCM detects that there is a low oil level condition, the PCM will command the low oil lamp ON.

MIL Command: The scan tool displays On/Off. This is the commanded state of the MIL by the PCM.

Reduced Engine Power: The scan tool displays Active/Inactive. The scan tool will display Active when the PCM receives a signal from the TAC module that a throttle actuator control system malfunction is occurring. The PCM will limit the engine power.

Service Throttle Soon: The scan tool displays On/Off. This is the state of the service throttle soon indicator as commanded by the PCM. When the PCM detects a malfunction in the throttle system, the PCM will illuminate the indicator.

Vehicle Speed: The scan tool displays 0-255 km/H (0-155 mph). The PCM monitors the voltage at the signal circuit of the vehicle speed sensor. The voltage is proportional to the vehicle speed.