Operation CHARM: Car repair manuals for everyone.

Reference Value PID/Measured Signal Chart



Reference Value PID/Measured Signal Chart

The listing reflects PIDS and/or measured values which may reveal a possible concern within each system shown. Match the category number with the related PID/measured signal and go to the Typical Diagnostic Reference Value Charts.

PID Measured Signal Chart


















Some signals are only measured and will require the use of a digital multimeter (DMM).