Lotus Eleven/Elise/Exige. Manual - part 43

 

 

Lotus Service Notes   

 

 

  Section EMP

Page 27

Ignition System                P0351

                          P0352

                          P0353

                          P0354

P0351  Ignition Coil “A” Primary/Secondary Circuit

P0352  Ignition Coil “B” Primary/Secondary Circuit

P0353  Ignition Coil “C” Primary/Secondary Circuit

P0354  Ignition Coil “D” Primary/Secondary Circuit

Description

A Direct Ignition System (DIS) is used on the engine. The DIS improves the ignition accuracy, reduces high-

voltage loss, and enhances the reliability of the ignition system. The DIS is a 1-cylinder system that ignites one 

cylinder with one ignition coil. The ECU determines the ignition timing and outputs the ignition signals (IGT) for 

each cylinder. Based on IGT signals, the power transistors in the igniter cuts off the current to the primary coil, 

which induces a spark at the spark plug connected to the secondary coil. The igniter will also send an ignition 

confirmation signal (IGF) as a fail-safe measure to the ECU. 

Component connections                      '06 M.Y. in brackets

Connector Pin    Description          ECU Pin                    ECU Connector

1            Supply Voltage        Coil 1   Coil 2   Coil 3   Coil 4 

2            Ignition Coil Feedback   22 (F3)  22 (F3)  22 (F3)  22 (F3)  52 Way (Right)

3            Coil Output (Logic)     52 (G1)  26 (G4)  47 (G3)  48 (G2)  52 Way (Right)

4            Ground         

Malfunction Criteria

No IGF signal to ECM while engine is running

Potential failure modes:

•  Open or short in IGF1 – IGF4 circuit from ignition coil to ECU

•  Coil 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)

pages DI-97 to DI-103

Page 28

 

 

Lotus Service Notes   

 

 

  Section EMP

Catalyst System Efficiency             P0420

P0420  Catalyst System Efficiency Below Threshold

Description

The ECU compares the waveform of the oxygen sensors located before and after the catalyst to determine 

whether or not the catalyst has deteriorated. If the catalyst is functioning normally the front oxygen sensor will 

be switching between rich and lean whilst the rear oxygen sensor should also be switching between rich and 

lean but more slowly. When both the oxygen sensor waveforms change at the same rate, it indicates that the 

catalyst performance has deteriorated. The ECU counts the number of pre and post catalyst oxygen sensor 

switches and divides one by the other to determine a ratio number. If the ratio number is greater than 0.6 ('06 

M.Y.; 0.165) the code is set.

Sensor connections

Pre catalyst oxygen sensor

Sensor Connector    Description        ECU Pin    ECU Connector

1              Signal           15 (A3)    52 Way (Left)

2              Ground          41 (F4)    52 Way (Left)   

'06 M.Y. in brackets

3              Heater Supply      1 (K3)     52 Way (Left)

4              Battery Voltage     -        -

Post catalyst oxygen sensor

Sensor Connector    Description        ECU Pin    ECU Connector

1              Signal           3 (B3)     52 Way (Left)

2              Ground          29 (F4)    52 Way (Left)   

'06 M.Y. in brackets   

3              Heater Supply      27 (H3)    52 Way (Left)

4              Battery Voltage     -        -

Malfunction Criteria

•  Closed loop fuel control enabled

•  Coolant temperature > 60 °C (140 °F)

•  Baro > 756 mbar

•  Vehicle speed < 130 km/h (81 mph)

•  MAF < 40 g/sec

•  Air inlet temp > -10°C (14°F)

Disable Criteria:

P0101, P0102, P0103                                   – MAF faults

P0107, P0108                                        – MAP / Baro Faults

P0116, P0117, P0118                                    – Coolant temperature faults

P0131, P0132, P0133, P0134, P0135, P0137, P0138, P0139, P0140, P0141 – Oxygen sensor faults

P0171, P0172                                         – Fuelling faults

P0300, P0301, P0302, P0303, P0304                          – Misfire faults

Potential failure modes:

•  Exhaust system leak

•  Oxygen sensor faults

•  Oxygen sensor heater failure

•  Catalyst 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)

pages DI-86 to DI-88

 

 

Lotus Service Notes   

 

 

  Section EMP

Page 29

Evaporative Emission Control – Leak Detection System      P0441

                                          P0442

                                          P0455

                                          P0456 

P0441  Evaporative Emission System Incorrect Purge Flow

P0442  Evaporative Emission System Leak Detected (small leak)

P0455  Evaporative Emission System Leak Detected (large leak)

P0456  Evaporative Emission System Leak Detected (very small leak)

Description

During an Evaporative Emission System Leak Detection check, the vacuum in the system is monitored by ECU 

using the fuel tank pressure sensor. At the appropriate time, the test starts with the ECU closing the canister 

closure value and opening the purge solenoid with the appropriate duty cycle.  This allows the engine to draw 

a vacuum on the entire evaporative emission system. After a calibrated vacuum level is achieved the purge 

solenoid is closed, sealing the system. A leak is detected by monitoring any decrease in vacuum level over a 

calibrated period of time.

Sensor / component connections

Vapour Pressure sensor

Connector Pins   Description      ECU Pin    ECU Connector

1            Ground        78 (L4)    28 Way (Left)

2            Signal         75 (C1)    28 Way (Left)       

'06 M.Y. in brackets

3            5V V. Ref.      55 (M4)    28 Way (Left)

Purge Canister Closure Valve

Connector Pins   Description      ECU Pin    ECU Connector

A            Battery Voltage   -        -

B            ECU ground     9 (H2)     52 Way (Left)       

'06 M.Y. in brackets

Purge Solenoid

Connector Pins   Description      ECU Pin    ECU Connector

A            Battery Voltage   -        -

B            ECU ground     38 (F4)    52 Way (Right)       

'06 M.Y. in brackets

Enable Criteria:

•  Altitude < 8000 ft (2438 m), Baro > 700 mbar

•  Coolant > 45°C (113°F)

•  Air temp < 80°C (176°F)

•  Fuel level between 8 – 35 litres (2.1 – 9.24 US gallons)

•  Vehicle must be stationary

•  Closed loop fuelling control enabled

•  Closed loop idle speed control enabled

•  Ignition on

Disable Criteria:

P0171, P0172           – Fuel trim too rich or lean soft code

P0441, P0444, P0445     – Purge faults

P0446, P0447, P0448     – Canister closure faults

P0451, P0452, P0453     – Tank Pressure sensor faults

P0461, P0462, P0463     – Fuel level sensor faults

P0500               – Vehicle speed faults

Malfunction Criteria

P0441

This code can be caused by the purge value being either stuck closed or open.

Page 30

 

 

Lotus Service Notes   

 

 

  Section EMP

Purge valve stuck open

A purge valve that is unable to seal correctly will result in a tank evacuation during the sealing phase of the 

leak check sequence. In this phase, a pressure rise would normally be expected but when the purge valve 

is not sealing this causes depression in the tank. When the pressure is below -1.7mbar a purge valve fault is 

detected. 

Purge valve stuck closed

A purge valve that is unable to open will not be able to achieve the required depression during the evacuation 

phase. A positive pressure rise during the leak check evacuation phase will be detected. Additional purge checks 

will set a purge valve fault code.

Monitor: Until leak check is completed

P0442 

This code is set during the evaporative leak check process if the system calculates the measure of leak is above 

a specified value (determined by a table related to fuel level) after the 6.3 second timer has expired.

Monitor: Until leak check is completed

Potential failure modes:

•  Leak from pipes or connections

•  Leaking or damaged seal on filler cap / not fitted correctly

•  Canister Closure valve not fully closing

P0455

This code is set if during the evaporative leak check the system fails to reach the evacuation target pressure. 

The system will perform additional purge checks to determine the nature of the problem. The additional purge 

checks will also run if the leak check fails to complete because the calculated vapour concentration is above 

the limit.

Additional Purge Check Enable Criteria:

•  Vehicle not stationary

•  Load between 30 – 35%

•  Purge value >= 75%

Monitor: Until leak check is completed

Potential failure modes

•  Fuel filler cap not fitted

•  Leak from pipes or connections

•  Canister Closure valve stuck open

P0456

This code is set during the evaporative leak check process if the system calculates the measure of leak is above 

a specified value (determined by a table related to fuel level) after the 19.7 second timer has expired.

Monitor: Until leak check is completed

Potential failure modes:

•  Leak from pipes or connections

•  Leaking or damaged seal on filler cap / not fitted correctly

•  Canister Closure valve not fully closing

Notes:

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

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

page FI-53