Lotus Elise / Lotus Exige. Manual - part 41

Page 38

 

 

Lotus Service Notes   

 

 

  Section EMP

Fuel Pump                    P0627

P0627  Fuel Pump Control Circuit /Open

Description

The fuel system is of the non-return type.  The pump is incorporated into the fuel tank module which also con-

tains the level sensor, regulator and vapour pressure sensor.

Component connections

Connector          Description            ECU Pin    ECU Connector

4 (RMC 1 – MFRU*)    Inertia Switch (Pin 1)      -        -

2 (RMC 2 – MFRU*)    Fuel Pump Relay        68 (J4)    28 Way (Left)   

'06 M.Y. in brackets

*MFRU – Multi Function Relay Unit

Monitor: Continuous

Enable Criteria: Ignition on

Disable Criteria: None

Potential failure modes:

•  Pump open circuit or short to ground

•  Multi Function Relay Unit failure

•  Pump failure

•  ECU output circuit failure

Notes:

No MIL will be illuminated for this failure.

sn_emp_cyclone.indd   38

03/03/2006   11:03:39

 

 

Lotus Service Notes   

 

 

  Section EMP

Page 39

Air Conditioning System          P0646

                          P0647

P0646  A/C Clutch Relay Control Circuit Low

P0647  A/C Clutch Relay Control Circuit High

Component connections

Connector      Description        ECU Pin    ECU Connector

5 (ACCM 2*)    AC Clutch Relay    53 (J1)    28 Way (Left)     

'06 M.Y. in brackets

*ACCM – A/C Control Module

Monitor: Continuous

Enable Criteria: Engine running

Disable Criteria: None

Potential failure modes:

•  A/C compressor clutch open circuit or short to ground

•  A/C Control Module failure

•  A/C compressor clutch failure

•  ECU output circuit failure

Notes:

No MIL will be illuminated for this failure.

sn_emp_cyclone.indd   39

03/03/2006   11:03:39

Page 40

 

 

Lotus Service Notes   

 

 

  Section EMP

Misfire                      P1301

                          P1302

P1301  Misfire level causing emissions increase

P1302  Misfire level causing catalyst system damage

Description

When the engine misfire reaches a high enough percentage the engine emission output levels can exceed the 

allowed limits, this will produce the fault code P1301. If the misfire percentage is high enough and there is a 

possibility that the catalyst may be damaged then code P1302 will be set.

See misfire faults P0300, P0301, P0302, P0303, P0304

Notes:

•  The MIL will flash for a 1302 fault code

•  The MIL will be illuminated if the 1301 fault is present for 2 consecutive trips.

sn_emp_cyclone.indd   40

03/03/2006   11:03:40

 

 

Lotus Service Notes   

 

 

  Section EMP

Page 41

Coolant Recirculation Pump        P2602

                          P2603

P2602  Coolant Pump Control Circuit Low

P2603  Coolant Pump Control Circuit High

Description

During a hot shutdown of the engine, the recirculation pump can continue to pump coolant around the engine.  

The recirculation pump will run after the engine has been turned off if the enable criteria are matched.

Component connections

Connector          Description        ECU Pin    ECU Connector

2 (RMC 1 – MFRU*)    Fuse box         -        -

5 (RMC 2 – MFRU*)    Recirc Pump Relay  69 (K1)    28 Way (Left)   

'06 M.Y. in brackets

*MFRU – Multi Function Relay Unit

Monitor: Continuous

Enable Criteria: 

P2602 - engine not running

P2603 - engine running

Disable Criteria: None

Potential failure modes:

•  Pump open circuit or short to ground

•  Multi Function Relay Unit failure

•  Pump failure

•  ECU output circuit failure

Notes:

No MIL will be illuminated for this failure.

sn_emp_cyclone.indd   41

03/03/2006   11:03:40