Fuel Injection System - Lotus Evora Service Notes

Lotus Service Notes

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
1 H4
2 H3
3 H2
4 H1
5 G4
6 G3
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.
ECU Connector
32 Way (Left)
32 Way (Left)
32 Way (Left)
32 Way (Left)
32 Way (Left)
32 Way (Left)
2009/02
Section EMR
Page 33