Lotus Eleven/Elise/Exige. Manual - part 39

 

 

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

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

 

 

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

Page 14

 

 

Lotus Service Notes   

 

 

  Section EMP

Coolant Thermostat              P0128

P0128  Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

Description

The thermostat diagnostic is enabled after each cold engine start, and monitors the rate of temperature rise 

during warm up relative to the measured engine air flow.

Monitor: Continuous

Enable Criteria:

•  Engine running

•  Coolant Temperature > -10°C (14°F)

•  Coolant Temperature < 70°C (158°F)

Disable Criteria: 

P116, P117, P118 – Engine Coolant Temperature sensor faults

Potential failure modes:

Thermostat failure

Notes:

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