Lotus Eleven/Elise/Exige. Manual - part 42

 

 

Lotus Service Notes   

 

 

  Section EMP

Page 23

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-73 to DI-78

Page 24

 

 

Lotus Service Notes   

 

 

  Section EMP

Knock Control System            P0324

                          P0327

                          P0328

P0324  Knock Control System Error

P0327  Knock Sensor 1 Circuit Low

P0328  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 dif-

ferentiate between spark knock and other similar sounding noises. 

Sensor connections

Sensor Connector    Description      ECU Pin    ECU Connector

1              Sensor input     43 (C4)    52 Way (Right)       

'06 M.Y. in brackets

2              Ground        13 (A4)    52 Way (Right)

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

 

 

Lotus Service Notes   

 

 

  Section EMP

Page 25

Engine Speed / Position Sensors        P0335

P0335  Crankshaft Position Sensor “A” Circuit Range/Performance

Description

Engine speed is calculated by measuring the time between the ‘teeth’ of the crankshaft sensor trigger disc. The

disc has 34 ‘teeth’ and 2 missing ‘teeth’, spaced at 10 degree intervals around the disc. The 2 missing ‘teeth’

are positioned at 225 degrees before cylinder No.1 and 4 TDC.  The crankshaft sensor signal is also used to 

determine misfires events.

Sensor connections

Sensor Connector    Description      ECU Pin    ECU Connector

1              Sensor input     4 (E1)     52 Way (Right)       

'06 M.Y. in brackets

2              Ground        30 (E4)    52 Way (Right)

Monitor: Continuous

Enable Criteria: Engine running

Disable Criteria: None

Potential failure modes:

•  Sensor signal open circuit or short to ground

•  Sensor ground open circuit

•  Sensor failure

Notes:

•  If a sensor or sensor circuit failure occurs, the engine will not fire or start.

•  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-82 to DI-83

Page 26

 

 

Lotus Service Notes   

 

 

  Section EMP

Engine Speed / Position Sensors          P0340

P0340  Camshaft Position Sensor “A” Circuit

Description

The camshaft position input to the ECU is used to determine engine phase, enable sequential fuel injection 

control and to determine camshaft position for the VVT system. The inlet camshaft has three ‘teeth’ spaced 90°

apart, which are detected by the electromagnetic sensor.  The valve timing setting is measured in the ECU by 

measuring time from a (fixed position) crankshaft tooth to a (variable position) camshaft tooth.  As the engine 

speed and the position is known from the crankshaft sensor signal, the camshaft position can be calculated.

Sensor connections

Sensor Connector    Description      ECU Pin    ECU Connector

1              Signal(VR Input)  16 (C1)    52 Way (Right)       

'06 M.Y. in brackets

2              Ground        42 (E2)    52 Way (Right)

Monitor: Continuous

Enable Criteria:

•  Engine running

•  Engine speed > 600rpm

Disable Criteria: None

Potential failure modes:

•  Sensor signal open circuit or short to ground

•  Sensor ground open circuit

•  Sensor failure

Notes:

•  The MIL will be illuminated if the fault is present for 2 consecutive trips.

•  Further information on the sensor may be found in Toyota 1ZZ-FE, 2ZZ-GE manual RM733E (B120T0327J)

pages DI-84 to DI-85