Lotus Evora. Instruction - part 22

 

 

Lotus Service Notes   

 

 

  Section EMR

Disable Criteria: 

•  None

Malfunction Criteria: 

•  Voltage at ECU < 0.52V for time > 1.5 secs

Potential failure modes:

•  MAF sensor circuit open

•  MAF sensor circuit short to ground

Diagnostic Mask:

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

P0103

Monitor: 

•  Continuous.

Enable Criteria: 

•  Engine running

Disable Criteria: 

•  None

Malfunction Criteria: 

•  Voltage at ECU > 4.86V for time > 1.5 secs

Potential failure modes:

•  MAF sensor circuit short to ECU supply voltage

Diagnostic Mask:

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

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

Barometric Pressure

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.

P0106

P0107, P0108

Monitor: 

•  Continuous

Enable Criteria: 

•  Engine running

Disable Criteria: 

•  None

Malfunction Criteria: 

•  P0107: Voltage at ECU < 1.08V for time > 1.5 secs

•  P0108: Voltage at ECU > 4.98V for time > 1.5 secs

Potential failure modes:

•  Sensor failure

Diagnostic Mask:

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

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

Intake Air Temperature

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 measures both Mass Air Flow (MAF) and Intake Air Temperature (IAT) is incorpo-

rated into the air box.  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              IAT Signal        J3     48 Way (Centre)

2              IAT Ground        E3     48 Way (Centre)

3              Battery Voltage      -          -

4              MAF Ground      J4     48 Way (Centre)

5              MAF Signal        G1     48 Way (Centre)

Sensor characteristics

IAT -20°C (-4°F)  13.6 – 18.4 kΩ

IAT 20°C (68°F)  2.21 – 2.69 kΩ

IAT 60°C (140°F)  0.50 – 0.67 kΩ

P0111

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

P0112

Monitor: 

•  Continuous

Disable Criteria: 

•  None

Enable Criteria: 

•  Engine running

Malfunction Criteria:

•  Inlet air temperature > 119°C (246°F) for time > 1.5 secs

Potential failure modes:

•  Signal short circuit

•  Sensor failure

Diagnostic Mask:

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

P0113

Monitor: 

•  Continuous

Disable Criteria: 

•  None

Enable Criteria: 

•  Engine running

Malfunction Criteria:

•  Inlet air temperature < –40°C (–104°F) for time > 1.5 secs

Potential failure modes:

•  Signal open circuit

•  Sensor failure

Diagnostic Mask:

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

2009/02