Engine Speed (RPM) Signal, Checking

Engine Speed (RPM) Signal, Checking

NOTE:
- The signal is generated by the engine speed (RPM) sensor -G28- processed in the Engine Control Module (ECM) and directed to various parts of the electronic system (e.g. control module for A/C or ABS / EDS) from terminal 37 of the ECM. Engine speed signal and wire connections are monitored by theses systems.
- Checking engine speed signal.
- Checking engine speed sensor -G28-. Engine Speed (RPM) Sensor -G28-, Testing