Lotus Evora. Instruction - part 23

 

 

Lotus Service Notes   

 

 

  Section EMR

Engine Coolant Temperature

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          C3       48 Way (Centre)       

2              Signal           G2          48 Way (Centre)

Sensor characteristics

-20°C (-4°F)      = 13.84 – 16.33 KΩ

20°C (68°F)      = 2.31 – 2.58 KΩ

80°C (176°F)      = 0.310 – 0.326 KΩ

110°C (230°F)      = 0.1399 – 0.1435 KΩ

P0116

Monitor: 

•  Continuous

Disable Criteria: 

•  None

Enable Criteria 1:

•  Engine running > 1000 seconds

Malfunction Criteria 1:

•  Engine coolant temperature < 40°C (104°F)

Enable Criteria 2:

•  Engine running

Malfunction Criteria 2:

•  Engine coolant temperature erratic by more than 30°C (54°F)

Potential failure modes:

•  Sensor wiring

•  Sensor failure

•  Thermostat failure

Diagnostic Mask:

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

P0117

Monitor: 

•  Continuous

Disable Criteria: 

•  None

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

Enable Criteria: 

•  Engine running

Malfunction Criteria:

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

Potential failure modes:

•  Signal short circuit

•  Sensor failure

•  Thermostat failure

•  Cooling system problem

Diagnostic Mask:

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

P0118

Monitor: 

•  Continuous

Disable Criteria: 

•  None

Enable Criteria: 

•  Engine running

Malfunction Criteria:

•  Coolant temperature > -38°C (-36°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

 

 

Lotus Service Notes   

 

 

  Section EMR

Throttle Position

P0122  Throttle Position Sensor 'A' Circuit Low

P0123  Throttle Position Sensor 'A' Circuit High

P0222     Throttle Position Sensor ‘B’ Circuit Low

P0223     Throttle Position Sensor ‘B’ Circuit High

Description

The throttle position sensor (TPS) is mounted on the throttle body, and detects the opening angle of the throt-

tle valve.  The TPS has 2 sensor circuits, each of which transmits a signal, VTA1 and VTA2. VTA1 is used to 

detect the throttle valve angle and VTA2 is used to detect malfunctions in VTA1. The sensor signal voltages 

vary between 0 V and 5 V in proportion to the throttle valve opening angle, and are transmitted to the VTA 

terminals of the ECU.

Sensor connections

Sensor Connector    Description    ECU Pin    ECU Connector

1              ETB -ve         M1      48 Way (Centre)

2              ETB +ve       L2      48 Way (Centre)

3              Ground             C4     48 Way (Centre)   

4              TPS 1B Signal    F3           48 Way (Centre)

5              TPS 1A/B V Ref  E4       48 Way (Centre)

6              TPS 1A Signal    F2     48 Way (Centre)

Sensor characteristics

0% = 0.595 V ± 5%

100% = 4.148 V ± 5%

P0122

Monitor: 

•  Continuous.

Enable Criteria: 

•  None

Disable Criteria: 

•  None

Malfunction Criteria:

•  Signal voltage < 0.635V

Potential failure modes:

•  Signal short circuit

•  Reference voltage open circuit

•  Reference voltage short to ground

•  Sensor failure

Diagnostic Mask:

•  The MIL will be illuminated if fault is present.

P0123

Monitor: 

•  Continuous.

Enable Criteria:

•  None

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

Disable Criteria: 

•  None

Malfunction Criteria:

•  Signal voltage > 4.765V

Potential failure modes:

•  Signal open circuit

•  Reference voltage open circuit

•  Reference voltage short to ground

•  Sensor failure

Diagnostic Mask:

•  The MIL will be illuminated if fault is present.

P0222

Monitor: 

•  Continuous.

Enable Criteria: 

•  None

Disable Criteria: 

•  None

Malfunction Criteria:

•  Signal voltage < 2.146V

Potential failure modes:

•  Signal short circuit

•  Reference voltage open circuit

•  Reference voltage short to ground

•  Sensor failure

Diagnostic Mask:

•  The MIL will be illuminated if fault is present.

Notes: A maximum throttle opening of 15% may be imposed due to this single code.  In the case of multiple 

codes, a mechanically sprung 7% opening may be applied.

P0223

Monitor: 

•  Continuous.

Enable Criteria: 

•  None

Disable Criteria: 

•  None

Malfunction Criteria:

•  Signal voltage > 4.985V

2009/02