Lotus Elise / Lotus Exige. Manual - part 34

Page 10

 

 

Lotus Service Notes   

 

 

  Section EMP

Engine Coolant Temperature        P0116

                          P0117

                          P0118

P0116   Engine Coolant Temperature Circuit Range/Performance

P0117   Engine Coolant Temperature Circuit Low

P0118   Engine Coolant Temperature Circuit High

Description

The engine coolant temperature sensor is a thermistor device which changes resistance with temperature.  As 

coolant temperature decreases the thermistor resistance value increases, and conversely as coolant tempera-

ture increases so the thermistor resistance value decreases.

Sensor connections

Sensor Connector    Description    ECU Pin    ECU Connector

1              Ground      7 (H1)     52 Way (Right)       

'06 M.Y. in brackets

2              Signal       33 (C3)     52 Way (Right)

Sensor characteristics

0°C (32°F)       = 3.279 V

19.4°C (67°F)     = 2.186 V

42.5°C (108.5°F)  = 1.249 V

80°C (176°F)     = 0.469 V

P0116

Enable Criteria:

Engine running > 800 seconds

Disable Criteria: None

Potential failure modes:

•  P0117 – signal short circuit

•  P0118 – signal open circuit

•  Sensor failure

P0117

Enable Criteria: Engine running

Disable Criteria: None

Potential failure modes:

•  Signal short circuit (Coolant Temperature = –40°C (–104°F) < 0.029 V)

•  Sensor failure

P0118

Enable Criteria: Engine running

Disable Criteria: None

Potential failure modes:

•  Signal open circuit (Coolant Temperature > 140°C (284°F) > 4.892 V)

•  Sensor failure

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Lotus Service Notes   

 

 

  Section EMP

Page 11

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) 

page DI-39 to DI-45

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Page 12

 

 

Lotus Service Notes   

 

 

  Section EMP

Throttle Position                P0121

                          P0122

                          P0123

P0121  Throttle Position Sensor 'A' Circuit Range/Performance

P0122  Throttle Position Sensor 'A' Circuit Low

P0123  Throttle Position Sensor 'A' Circuit High

Description

The Throttle Position Sensor (TPS) is a potentiometer device, which is connected to a 5V reference source, a 

ground and an input signal to the ECU.

Sensor connections

Sensor Connector    Description    ECU Pin    ECU Connector

1              Ground      34 (D1)    52 Way (Right)

2              5V Ref.      8  (M4)    52 Way (Right)       

'06 M.Y. in brackets

3              TPS1 Signal   20 (D3)    52 Way (Right)

4              TPS2 Signal   (E3)      (Right)

Sensor characteristics

0% = 0.595 V ± 5%

100% = 4.148 V ± 5%

Monitor: Continuous.

P0121

Enable Criteria:

Rationality check – throttle not too high at low engine load:

•  Engine running

•  TPS > 80%

•  Engine speed >1500rpm

•  MAPS* < 40%

•  Vehicle Speed > 30 km/h (18.6mph)

OR

Rationality check – throttle not too low at high engine load:

•  Engine running

•  TPS < 10%

•  Engine speed 1500 – 2010rpm

•  MAPS* > 65%

*(MAPS – Mass Air Per Stroke)

Disable Criteria:

P0101, P0102, P0103   – MAF Sensor fault codes

P0500             – Vehicle Speed sensor

P0016            – Crankshaft/Camshaft position correlation error

Potential failure modes:

•  Sensor short or open circuit

•  Sensor failure

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Lotus Service Notes   

 

 

  Section EMP

Page 13

P0122

Enable Criteria: None

Disable Criteria: 

P0016    – Crankshaft/Camshaft position correlation error

Potential failure modes:

•  Signal short circuit (< 0.283 V)

•  Reference voltage open circuit

•  Reference voltage short to ground

•  Sensor failure

P0123

Enable Criteria: None

Disable Criteria: 

P0016    – Crankshaft/Camshaft position correlation error

Potential failure modes:

•  Signal open circuit (> 4.487 V)

•  Reference voltage open circuit

•  Reference voltage short to ground

•  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 inToyota 1ZZ-FE, 2ZZ-GE manual RM733E (B120T0327J) 

page DI-45 to DI-52

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