A L L Diagnostic Trouble Codes ( DTC ): Testing and Inspection

1000 rpm / Light OFF Faulty RPM sensor or open circuit in wiring
1000 rpm / Light ON Ignition timing at retard limit, engine still knocking
2000 rpm / Light OFF Faulty ignition timing sensor, open or short in sensor wiring, ignition dist. improperly installed
2000 rpm / Light ON Faulty knock sensor or open circuit in sensor wiring
3000 rpm / Light OFF Faulty Hall generator, open in Hall generator wiring, ignition distributor improperly installed
3000 rpm / Light ON Faulty intake air temp. sensor or open circuit in sensor wiring
4000 rpm / Light OFF Vacuum hose to ignition control unit blocked or leaking
4000 rpm / Light ON Faulty coolant temp. sensor or open circuit in sensor wiring
5000 rpm / Light OFF Faulty pressure sensor in ignition control unit
6000 rpm / Light OFF Faulty idle switch or open circuit in wiring to switch
7000 rpm / Light OFF End of diagnosis sequence
7000 rpm / Light ON Begining of diagnosis sequence