Lotus Evora. Manual - part 32

 

 

Lotus Service Notes   

 

 

  Section EMR

Malfunction Criteria 1: 

•  Brake switch on for greater than 25.5 seconds

Malfunction Criteria 2:

•  ABS indicating brakes are on but brake switch off for greater than 0.5 seconds

Potential failure modes:

•  Brake switch wiring open circuit or shorted

•  Brake switch fault

Diagnostic Mask:

•  The service light will be illuminated for 30 seconds after engine start if the fault has been present for the

previous two trips.

 

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

ECU Integrity

P0601  Checksum

P0606  Watchdog

Description

These codes are used by the ECU to check the integrity of the software and calibration data. 

P0601 checks that on power up the checksum for calibration data is the same as checksum saved on the 

previous power down. 

P0606 checks the watchdog timer after a defined period to see if it has reset. If the watchdog timer has not 

reset then the code has entered an unplanned loop or condition stopping it resetting the timer.

Monitor

•  P0601 at ECU power up

•  P0606 continuously while the engine running

Diagnostic Mask:

•  The MIL will be illuminated if a fault is present.

 

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

Variant Code Not Programmed

P0610  Variant code not programmed

Description

The ECM programming process includes the Vehicle Variant Code.  If a new ECM has been fitted, the relevant 

variant code needs to be programmed using the Lotus TechCentre tool.

Monitor

•  During start up

Disable criteria

•  None

Potential failure modes

•  Variant code not programmed

Diagnostic mask

•  The MIL will be illuminated if fault is present.

2009/02

 

 

Lotus Service Notes   

 

 

  Section EMR

Crank Relay

P0616  Starter relay voltage low

P0617  Starter relay voltage high

Description

When the ignition key is in the crank position battery voltage is applied to the start request input of the ECM. 

The ECM will then energise the crank relay, via the immobiliser, to allow the starter motor to be engaged. 

ECM diagnosis is only carried out on the crank relay.

Component connections                           

Relay Connector    Description                  ECU Pin    ECU Connector

2              Main relay via fuse R1           -        -

4              Crank relay control             G1       48 Way (Right) 

Monitor: 

•  Continuous

Enable Criteria: 

•  Engine running

Disable Criteria: 

•  None

Potential failure modes:

•  P0616 – Crank relay wiring open circuit or shorted to ground

•  P0616 – Fuse R1

•  P0617 – Crank relay wiring shorted to 12V

•  Crank relay failure

•  Immobiliser failure

•  ECU output circuit failure

Diagnostic Mask:

•  The service light will be illuminated for 30 seconds after engine start if the fault has been present for the

previous two trips.

 

2009/02