Lotus Evora - Fuel Injection System

Lotus Service Notes Section EMR
Page 33
Fuel Injection System
P0261 Injector Circuit low voltage – Cylinder 1
P0262 Injector Circuit high voltage – Cylinder 1
P0264 Injector Circuit low voltage – Cylinder 2
P0265 Injector Circuit high voltage – Cylinder 2
P0267 Injector Circuit low voltage – Cylinder 3
P0268 Injector Circuit high voltage – Cylinder 3
P0270 Injector Circuit low voltage – Cylinder 4
P0271 Injector Circuit high voltage – Cylinder 4
P0273 Injector Circuit low voltage – Cylinder 5
P0274 Injector Circuit high voltage – Cylinder 5
P0276 Injector Circuit low voltage – Cylinder 6
P0277 Injector Circuit high voltage – Cylinder 6
Description
The ECU has six injector driver circuits, each of which controls an injector. When the engine is running the
ECU continuously monitors the injector circuit feedback signals. The monitored feedback signal should be low
voltage when the injector is ON and high voltage when the injector is OFF.
Component connections
Injector ECU Pin ECU Connector
1 H4 32 Way (Left)
2 H3 32 Way (Left)
3 H2 32 Way (Left)
4 H1 32 Way (Left)
5 G4 32 Way (Left)
6 G3 32 Way (Left)
Monitor:
• Continuous
Enable Criteria:
• Enginerunning
Potential failure modes:
• Sensorconnectororwiringcorrodedorlooseconnections
Diagnostic Mask:
• TheMILwillbeilluminatedifthesefaultsarepresentfor2consecutivetrips.
Limp home:
• Limitmaximumenginespeedto4000rpm
• Returnthefuelsystemoftheaffectedbanktoopenloopfuelcontrol
Notes:
If an injector goes short circuit it is likely that the ECU injector driver will be damaged.
2009/02