That's why many professional technicians own multiple scan tools: an aftermarket general purpose scan tool, and one or more OEM scan tools for the makes they most frequently work on. The trouble is you never know what PIDS are missing until you go looking for one and find it isn't there.
TORQUE PRO EXTENDED PIDS EXPLAINED SOFTWARE
Most general purpose aftermarket scan tools do not contain the software that allows them to match the OEM scan tools in every respect - but for most applications they can display all the important PIDS. The OEM scan tools used by new car dealers are capable of displaying every possible PID value that is built into the engine management system. SCAN TOOL PID CAPABILITYĭifferent scan tools have different capabilities to display PIDS. PIDS can also be compared using a "graphing multimeter" or on a scope that converts the voltage values to waveforms.Ĭomparing the waveforms of several related sensors can help you find faults that might otherwise be impossible to detect. You can also compare PIDS to see how one component may be affecting another.įor example, when you suddenly open the throttle on an idling engine, rpm should increase, the TPS reading should change and the MAP sensor value should drop. PIDS provide valuable diagnostic information when checking the operation or status of various sensors, circuits and switches in the vehicle's engine management system.įor example, if the MIL lamp is on and you find an oxygen sensor code, you can call up the oxygen sensor PIDS on your scan tool display to see what the oxygen sensor is telling the PCM. Long and Short Term Fuel Trim, O2 sensor cross counts, injector duration.(Oxygen sensor rich/lean indication, coolant temperature, MAP value, TPS value, vehicle speed, mass air flow, ambient temperature, engine rpm, etc.) (Ready or Complete, or Not Ready or Incomplete) Status of the OBD II System Component Monitors.
TORQUE PRO EXTENDED PIDS EXPLAINED SERIAL
PIDS are the serial data that can be accessed from the vehicle computer using a scan tool.
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