Lotus 2004 ELISE Service Notes page 144

Lotus Service Notes
Fuel Injection System
P0201 Injector Circuit/Open – Cylinder 1
P0202 Injector Circuit/Open – Cylinder 2
P0203 Injector Circuit/Open – Cylinder 3
P0204 Injector Circuit/Open – Cylinder 4
Description
The ECU has four injector driver circuits, each of which controls an injector. When the engine is running the
ECU continuously monitors the injector circuit feedback signals. The feedback signal should be low when the
injector is ON and high voltage when the injector is OFF.
Component connections
Injector ECU Pin
1 25 (J1)
2 51 (K4)
3 14 (K3)
4 40 (K2)
Malfunction Criteria
The operation of all the injector codes is the same, the last digit relates to the injector involved i.e. a code P0203
indicates there is a problem with injector number 3.
Enable Criteria: Engine running
Monitor: Continuous
Limp home:
• Limit maximum engine speed to 6000rpm
• Return the fuel system to open loop fuel control
Potential failure modes:
Sensor connector or wiring corroded or loose connections
Notes:
• The MIL will be illuminated if the fault is present for 2 consecutive trips.
• If an injector goes short circuit it is likely that the ECU injector driver will be damaged.
sn_emp_cyclone.indd 21
P0201
P0202
P0203
P0204
ECU Connector
52 Way (Right)
'06 M.Y. in brackets
52 Way (Right)
52 Way (Right)
52 Way (Right)
Section EMP
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