SYSTEM DESCRIPTION
TROUBLE-SHOOTING
LE/LE2/LU
System Description
General
The LE/LE2/LU-Jetronic system is a development of the earlier Bosch
L-Jetronic fuel injection system. LE is the German designation of the
European version of their air flow meter, with LU being the designation
of the US version, i.e. a system incorporating a lambda sensor and lambda
correction in the control unit.
This system measures the volume of air inducted. The measurements
must therefore be corrected to allow for air temperature and a separate
air temperature sensor is used to do this. This provides the data required
to arrive at the amount of fuel to be injected as determined by the lambda
sensor and the corrections it makes in the control unit.
Summary - Car Models
The following car models are equipped with LE/LE2/LU Jetronic:
BMW CITROËN VAUXHALL OPEL
320i Visa GTi Astra GT/E & 1.8i Manta-B GT/E
323i CX 25 Belmont 1.8i Rekord 2000i
318i CX 25 Turbo 2 Cavalier 1800 Rekord 2.2i
518i Carlton 2000i Senator 2.5E
520i Carlton 2.2i & 3.0E
525i Monza 3.0E
528i
628 CSi
728i
VOLVO PEUGEOT FIAT LANCIA
360 GLE/GLT 205 GTi 1.6/CTi Uno Turbo ie Thema 2000 ie
205 GTi 1.9 Croma 2000 ie Turbo Thema Turbo ie
309 XS/SRi/GTi Delta HF 4¥4
505 GTi
Please check the workshop manual to verify if the actual car is equipped
with a system described in this manual.
Interface - Signal Locations 1. Control signal to ignition coil (terminal 1) 2. Signal from idle switch 3. Signal from full load switch 4. Signal from starter motor 5. Ground 6. Not connected 7. Signal from air flow meter 8. Signal from air temperature sensor 9. Power supply from main relay 10. Signal from coolant temperature sensor 11. Not connected 12. Control signal to injection valves 13. Ground 14. Not connected 15. Control signal to ignition coil (only Citroën) 16. Not connected 17. Not connected 18. Not connected 19. Not connected 20. Signal from lambdasensor 21. Not connected 22. Integrator, signal (only LU-Jetronic) 23. Not connected 24. Control signal to injections valves 25. Ground
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Interface - Signal Locations 1. Control signal to ignition coil (terminal 1) 2. Signal from idle switch 3. Signal from full load switch 4. Signal from starter motor 5. Ground 6. Not connected 7. Signal from air flow meter 8. Signal from air temperature sensor 9. Power supply from main relay 10. Signal from coolant temperature sensor 11. Not connected 12. Control signal to injection valves 13. Ground 14. Not connected 15. Control signal to ignition coil (only Citroën) 16. Not connected 17. Not connected 18. Not connected 19. Not connected 20. Signal from lambdasensor 21. Not connected 22. Integrator, signal (only LU-Jetronic) 23. Not connected 24. Control signal to injections valves 25. Ground
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