Lotus Eleven/Elise/Exige. Instruction - part 37

 

 

Lotus Service Notes   

 

 

  Section EMP

Page 3

DTC    Fault description                                                Page

P0444  Evaporative Emission System Purge Control Valve Circuit Open                   31

P0445  Evaporative Emission System Purge Control Valve Circuit Shorted                  31

P0446  Evaporative Emission System Vent Control Circuit                            31

P0447  Evaporative Emission System Vent Control Circuit Open                        31

P0448  Evaporative Emission System Vent Control Circuit Shorted                      31

P0451  Evaporative Emission System Pressure Sensor/Switch Range/Performance            31

P0452  Evaporative Emission System Pressure Sensor/Switch Low                      31

P0453  Evaporative Emission System Pressure Sensor/Switch High                      31

P0455  Evaporative Emission System Leak Detected (large leak)                       29

P0456  Evaporative Emission System Leak Detected (very small leak)                    29

P0461  Fuel Level Sensor “A” Circuit Range/Performance                            32

P0462  Fuel Level Sensor “A” Circuit Low                                       32

P0463  Fuel Level Sensor “A” Circuit High                                      32

P0480  Fan 1 Control Circuit                                              33

P0481  Fan 2 Control Circuit                                              33

P0500  Vehicle Speed Sensor “A”                                          34

P0506  Idle Air Control System RPM Lower Than Expected                           35

P0507  Idle Air Control System RPM Higher Than Expected                          35

P0508  Idle Air Control System Circuit Low                                     35

P0509  Idle Air Control System Circuit High                                    35

P0562  System Voltage Low                                              36

P0563  System Voltage High                                              36

P0601  Watchdog                                                    37

P0606  Checksum                                                    37

P0627  Fuel Pump Control Circuit /Open                                      38

P0646  A/C Clutch Relay Control Circuit Low                                    39

P0647  A/C Clutch Relay Control Circuit High                                    39

P1301  Misfire level causing emissions increase                                  40

P1302  Misfire level causing catalyst system damage                              40

P2602  Coolant Pump Control Circuit Low                                      41

P2603  Coolant Pump Control Circuit High                                     41

P2646  A Rocker Arm Actuator System Performance or Stuck Off                       42

P2647  A Rocker Arm Actuator System Stuck On                                 42

P2648  A Rocker Arm  Actuator Control Circuit Low                                42

P2649  A Rocker Arm  Actuator Control Circuit High                                42

When applicable, reference may be made under the 'Notes' heading to a page in the Toyota service instruction.  

This information should be used only for diagnosis and connection detail of the 

sensor.  The Elise/Exige uses 

a Lotus ECU, the connections for which may be found in circuit diagrams in Section MP.  Diagnostic Trouble 

Codes should be read using a Lotus Scan tool T000T1418F.

For 2006 M.Y. Trouble Codes see Section EMP.6

Page 4

 

 

Lotus Service Notes   

 

 

  Section EMP

Camshaft Timing Control (VVT)      P0011

                          P0012

                          P0076

                          P0077

P0011   Camshaft Position – Timing Over-Advanced or System Performance

P0012   Camshaft Position – Timing Over-Retarded

P0076  Intake Valve Control Solenoid Circuit Low

P0077  Intake Valve Control Solenoid Circuit High

Description

The Variable Valve Timing system (VVT) on the intake camshaft can vary the timing by approximately 25°.  The 

camshaft relative position is varied by a system of vanes mounted on the drive end of the camshaft.  The VVT 

oil control valve modulates a spool valve position in accordance with the drive signal duty cycle, this in turns 

controls the oil pressure applied to the vanes.  A 50% duty cycle applied to the valve will hold the valve current 

timing by preventing oil flow from the VVT controller housing, a duty cycle less than 50% will retard the valve 

timing, a duty cycle greater then 50% will advance the valve timing.

Component connections

Sensor Connector    Description          ECU Pin    ECU Connector

1              Battery Voltage       -        -

2              VVT Oil Control Valve   49 (J3)    52 Way (Right)     

'06 M.Y. in brackets

                     

P0011, P0012

Monitor: Continuous

Enable Criteria:

•  Engine running > 30 secs

•  Coolant temperature > 60°C (140°F)

Disable Criteria:

P0116, P0117, P0118 – Coolant temperature fault codes

Potential failure modes:

•  Static valve timing is incorrect

•  VVT camshaft actuator failure

•  VVT valve stuck open / closed

P0076, P0077

Monitor: Continuous

Enable Criteria: Engine running

Disable Criteria: None

Potential failure modes:

•  VVT valve open circuit

•  VVT valve short to ground

•  ECU output circuit failure

Notes:

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

 

 

Lotus Service Notes   

 

 

  Section EMP

Page 5

Intake Air Flow                 P0101

                          P0102

                          P0103

P0101  Mass or Volume Air Flow Circuit Range/Performance

P0102  Mass or Volume Air Flow Circuit Low Input

P0103  Mass or Volume Air Flow Circuit High Input

Description

The Mass Air Flow (MAF) sensor is incorporated into the airbox, and measures both intake air flow rate and 

Intake Air Temperature (IAT).  The MAF sensor uses a platinum hot wire and a cold wire element.  By control-

ling the current flow through the hot wire to maintain a constant temperature, and therefore known resistance, 

any change in air flow and therefore temperature, will be detected by a change in resistance.  This change of 

resistance is the output signal from the sensor.

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

0 – 655 g/sec

Typical values: 1.5 – 5.0 g/sec (idle), 5.0 – 15.0 g/sec (2500rpm elevated idle no load)

Monitor: Continuous.

P0101

Enable Criteria:

•  Engine running

•  Engine speed >2490rpm

•  TPS > 80% (P0101 – MAPS* too low)

•  TPS < 5% (P0101 – MAPS* too high)

*(MAPS – Mass Air Per Stroke)

Disable Criteria:

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

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)

P0102

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)

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)

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