Lotus Elise / Lotus Exige. Instruction - part 33

Page 6

 

 

Lotus Service Notes   

 

 

  Section EMP

P0103

Enable Criteria: Engine running

Disable Criteria: None

Potential failure modes:

•  MAF sensor battery voltage open circuit (MAF value (g/sec) = 0.0)

•  MAF sensor signal open circuit or short to ground (MAF value (g/sec) = 0.0)

•  MAF sensor ground open circuit (MAF value (g/sec) > 229.0)

Notes:

•  The MIL will be illuminated if the faults are present for 2 consecutive trips

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

Page DI-26 to DI-32

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Lotus Service Notes   

 

 

  Section EMP

Page 7

Barometric Pressure             P0106

                          P0107

                          P0108

P0106  Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance

P0107  Manifold Absolute Pressure/Barometric Pressure Circuit Low Input

P0108  Manifold Absolute Pressure/Barometric Pressure Circuit High Input

Description

The barometric pressure sensor is located internally within the ECU, and measures atmospheric pressure.  This 

parameter is required to compensate the mass air flow when the vehicle is operated at higher altitudes.

Monitor: Continuous

P0106

Enable Criteria:

•  Engine running

•  Engine speed 2190 – 3510rpm

•  TPS > 80%

Disable Criteria:

P0101, P0102, P0103 – MAF Sensor fault codes

P0121, P0122, P0123, P0222, P0223, P2135 – Throttle/Pedal position fault codes

Potential failure modes:

Sensor failure

P0107, P0108

Enable Criteria: Engine running

Disable Criteria: None

Potential failure modes:

Sensor failure

Notes:

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

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Page 8

 

 

Lotus Service Notes   

 

 

  Section EMP

Intake Air Temperature            P0111

                          P0112

                          P0113

P0111 Intake Air Temperature Sensor 1 Circuit Range/Performance

P0112 Intake Air Temperature Sensor 1 Circuit Low

P0113 Intake Air Temperature Sensor 1 Circuit High

Description

The combined sensor which measure both Mass Air Flow (MAF) and Intake Air Temperature (IAT) is incorpo-

rated into the airbox.  The IAT sensor is a thermistor device which changes resistance with temperature.  As 

air intake temperature decreases the thermistor resistance value increases, and conversely as air temperature 

increases so the thermistor resistance value decreases.

Sensor connections

Sensor Connector    Description      ECU Pin    ECU Connector

1              Battery Voltage   -        -

2              MAF Ground    31 (D2)    52 Way (Right)

3              MAF Signal      45 (B4)    52 Way (Right)     

'06 M.Y. in brackets

4              IAT Signal      44 (B3)    52 Way (Right)

5              IAT Ground      18 (D2)    52 Way (Right)

Sensor characteristics

IAT -20°C (-4°F)  12.5 – 16.9 kΩ

IAT  20°C (68°F)  2.19 – 2.67 kΩ

IAT  60°C (140°F)  0.50 – 0.68 kΩ

Monitor: Continuous

P0111

Enable Criteria:

•  Engine running < 30 secs

•  Coolant temperature < 30°C (86°F)

Disable Criteria:

P0116, P0117, P0118 – Coolant temperature fault codes

Potential failure modes:

•  P0112 – signal short circuit

•  P0113 – signal open circuit

•  Sensor failure

P0112

Enable Criteria: Engine running

Disable Criteria: None

Potential failure modes:

•  Signal short circuit (IAT = –40°C (–104°F) < 0.049 V)

•  Sensor failure

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Lotus Service Notes   

 

 

  Section EMP

Page 9

P0113

Enable Criteria: Engine running

Disable Criteria: None

Potential failure modes:

•  Signal open circuit (IAT > 140°C (284°F) > 4.932 V)

•  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 instruction RM733E (B120T0327J) 

pages DI-33 to DI-38

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