1
Download Lotus Service Notes Section EMP
Transcript
Lotus Service Notes Knock Control System P0324 P0327 P0328 Section EMP P0324 P0327 P0328 Knock Control System Error Knock Sensor 1 Circuit Low Knock Sensor 1 Circuit High Description The knock sensor contains a piezoelectric element which generates a voltage when it becomes deformed. The piezoelectric element sends the signal to the ECU, when the cylinder block vibrates due to engine knocking. If knock is detected then the ECU will retard the ignition to suppress it. The knock control sensor cannot differentiate between spark knock and other similar sounding noises. Sensor connections Sensor Connector Description 1 Sensor input 2 Ground ECU Pin 43 13 ECU Connector 52 Way 52 Way Malfunction Criteria P0327 – This code is set when the knock sensor signal is < 0.586 V P0328 – This code is set when the knock sensor signal is > 2.928 V Potential failure modes: • Abnormal engine noise, i.e. damaged engine or exhaust system contacting vehicle • Knock sensor fixing too tight • Sensor connector / wiring corroded or loose connections Notes: • The MIL will be illuminated if the fault is present for 2 consecutive trips. • Further information on the sensor may be found inToyota 1ZZ-FE, 2ZZ-GE manual RM733E (B120T0327J) pages DI-79 to DI-81 Page 24 sn_emp_cyclone.indd 24 06/04/2005 15:45:31
