Diagnostic module lucas 17em
Discussion
If you dont have the catalysts and probes you can really only get a handful of useful errors, mostly about the ECU itself or various external sensors. Nothing to do with fueling or mis fires. The ECU is also pretty fault tolerant before it generates a code, so dont expect it to show minor errors. Personally Id get if its only for £35 (I paid that from a breaker in the USA) as the supply is limited. You will have the socket as long as its a 14cux ECU. (3.9 upwards)
Heres the codes.
02 ECU Supply has been disconnected
Normal code to get after ECU has been reset. May indicate supply problems if ECU has not been reset recently. Code will be cleared if the ignition is turned on for 30 seconds or so
03 Data corrupted. Corrupted data in ECU. Reset ECU and test drive again.
12 Airflow meter out of range Possible faulty airflow meter or connection/wiring fault.
14 Coolant thermistor out of range. Possible faulty coolant thermistor or connection/wiring fault.
15 Fuel thermistor out of range. Possible faulty coolant thermistor or connection/wiring fault.
17 Throttle pot out of range. Possible faulty throttle potentiometer / incorrect setting or connection/wiring fault.
18 Throttle pot output too high with low airflow. Major air leak between airflow meter and intake plenum. Possible faulty airflow meter or throttle potentiometer or wiring/connections to either.
19 Throttle sensor output too low with high airflow. Possible faulty airflow meter or throttle potentiometer or wiring/connections to either.
21 Tune resistor out of range Tune resistor has become disconnected / damaged.
23 Low fuel pressure. Possible faulty fuel pump/ blocked filter or faulty fuel pressure regulator. VALID FOR CAT CARS ONLY.
25 Misfire at full load. A misfire has been detected while engine under heavy throttle and during high airflow meter readings. Check coil/plugs/leads/ distributor and ignition module. Code means that lambda sensors have detected a rich condition under load. Also see codes 40 and 50. VALID FOR CAT CARS ONLY.
28 Air leak. Air leak around intake plenum. Check all hoses/ injector seals etc.
29 Checksum error. ECU fault. Try resetting ECU and test driving again. If fault code returns ECU may be faulty. NOTE – any other codes generated should be ignored.
34 Fuelling fault in nearside injector bank. For cylinders 1-3-5-7 Possible injector, lambda sensor fault or wiring / connection fault to either. Blocked injector(s) or air leak at injector /inlet manifold. VALID FOR CAT CARS ONLY.
36 Fuelling fault in offside injector bank. For cylinders 2-4-6-8. Possible injector, lambda sensor fault or wiring / connection fault to either. Blocked injector(s) or air leak at injector /inlet manifold. VALID FOR CAT CARS ONLY.
40 Misfire on nearside bank. Misfire on 1-3-5-7 cylinders only. Nearside lambda sensor has detected a fault (or fault in lambda sensor circuit). VALID FOR CAT CARS ONLY
44 Offside lambda sensor out of range. Possible faulty lambda sensor or wiring/connection fault. See section 5 below for check. If in conjunction with code 45 then suspect lambda heater circuit. VALID FOR CAT CARS ONLY
45 Nearside lambda sensor out of range. Possible faulty lambda sensor or wiring/connection fault. See section 5 below for check. If in conjunction with code 44 then suspect lambda heater circuit. VALID FOR CAT CARS ONLY
48 Stepper motor fully open below 500rpm or fully closed above 750rpm. Possible faulty stepper motor or wiring connections. Stepper motor needs cleaning / is jammed. Incorrectly set idle adjustment screw. Incorrectly set throttle butterfly. Misfire or rough running because of other faults.
50 Misfire on offside bank Misfire on 2-4-6-8 cylinders only. Offside lambda sensor has detected a fault (or fault in lambda sensor circuit). VALID FOR CAT CARS ONLY
58 ECU cannot distinguish between codes 23 and 28. Fault maybe either due to code 23 or 28.
59 Same as 58 or fuel thermistor out of range. Documentation seems to vary here. Code either means same as 58, or faulty fuel thermistor or wiring / connector fault.
68 Road speed sensor too low at medium rpm and high airflow. Possible speed sensor or wiring/ connection fault.
88 Power-up check / purge valve fault. Sometimes shown on power up (CAT and NON-CAT CARS ) or could also indicate purge valve fault with carbon canister system. (CAT CARS ONLY)
Mark
Heres the codes.
02 ECU Supply has been disconnected
Normal code to get after ECU has been reset. May indicate supply problems if ECU has not been reset recently. Code will be cleared if the ignition is turned on for 30 seconds or so
03 Data corrupted. Corrupted data in ECU. Reset ECU and test drive again.
12 Airflow meter out of range Possible faulty airflow meter or connection/wiring fault.
14 Coolant thermistor out of range. Possible faulty coolant thermistor or connection/wiring fault.
15 Fuel thermistor out of range. Possible faulty coolant thermistor or connection/wiring fault.
17 Throttle pot out of range. Possible faulty throttle potentiometer / incorrect setting or connection/wiring fault.
18 Throttle pot output too high with low airflow. Major air leak between airflow meter and intake plenum. Possible faulty airflow meter or throttle potentiometer or wiring/connections to either.
19 Throttle sensor output too low with high airflow. Possible faulty airflow meter or throttle potentiometer or wiring/connections to either.
21 Tune resistor out of range Tune resistor has become disconnected / damaged.
23 Low fuel pressure. Possible faulty fuel pump/ blocked filter or faulty fuel pressure regulator. VALID FOR CAT CARS ONLY.
25 Misfire at full load. A misfire has been detected while engine under heavy throttle and during high airflow meter readings. Check coil/plugs/leads/ distributor and ignition module. Code means that lambda sensors have detected a rich condition under load. Also see codes 40 and 50. VALID FOR CAT CARS ONLY.
28 Air leak. Air leak around intake plenum. Check all hoses/ injector seals etc.
29 Checksum error. ECU fault. Try resetting ECU and test driving again. If fault code returns ECU may be faulty. NOTE – any other codes generated should be ignored.
34 Fuelling fault in nearside injector bank. For cylinders 1-3-5-7 Possible injector, lambda sensor fault or wiring / connection fault to either. Blocked injector(s) or air leak at injector /inlet manifold. VALID FOR CAT CARS ONLY.
36 Fuelling fault in offside injector bank. For cylinders 2-4-6-8. Possible injector, lambda sensor fault or wiring / connection fault to either. Blocked injector(s) or air leak at injector /inlet manifold. VALID FOR CAT CARS ONLY.
40 Misfire on nearside bank. Misfire on 1-3-5-7 cylinders only. Nearside lambda sensor has detected a fault (or fault in lambda sensor circuit). VALID FOR CAT CARS ONLY
44 Offside lambda sensor out of range. Possible faulty lambda sensor or wiring/connection fault. See section 5 below for check. If in conjunction with code 45 then suspect lambda heater circuit. VALID FOR CAT CARS ONLY
45 Nearside lambda sensor out of range. Possible faulty lambda sensor or wiring/connection fault. See section 5 below for check. If in conjunction with code 44 then suspect lambda heater circuit. VALID FOR CAT CARS ONLY
48 Stepper motor fully open below 500rpm or fully closed above 750rpm. Possible faulty stepper motor or wiring connections. Stepper motor needs cleaning / is jammed. Incorrectly set idle adjustment screw. Incorrectly set throttle butterfly. Misfire or rough running because of other faults.
50 Misfire on offside bank Misfire on 2-4-6-8 cylinders only. Offside lambda sensor has detected a fault (or fault in lambda sensor circuit). VALID FOR CAT CARS ONLY
58 ECU cannot distinguish between codes 23 and 28. Fault maybe either due to code 23 or 28.
59 Same as 58 or fuel thermistor out of range. Documentation seems to vary here. Code either means same as 58, or faulty fuel thermistor or wiring / connector fault.
68 Road speed sensor too low at medium rpm and high airflow. Possible speed sensor or wiring/ connection fault.
88 Power-up check / purge valve fault. Sometimes shown on power up (CAT and NON-CAT CARS ) or could also indicate purge valve fault with carbon canister system. (CAT CARS ONLY)
Mark
RFC1 said:
where might the socket be? Sorry to hijack the original posters thread!!
S_M.
I think it will be dangling out of the ECU loom that runs under the passenger dash, near the tune resistor. Its a square socket with 4 female connectors. Im making a big assumption here however that the basic loom layout is the same as the Chim' and Ginetta.S_M.
Mark
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