Quote:
Originally Posted by handyjay
Frank, by "None" are you saying there is not a proper procedure to reboot the ECU? I replaced the O2 sensor last year along with the OVR. The car accelerates well now, and cold start idle is about 1000rpm until put in gear and then stumbles around 500rpm until warm up. Cleaned the aux air valve but no change. The car has 52,000 miles. Plugs, wires cap rotor all new. Temperature sending unit new. How would one determine the duty cycle?
Any thoughts? Thanks for your input.
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The "ECU", in Bosch terminology, is called a Lambda Controller. It operates the Electro-Hydraulic Actuator (EHA) on the Fuel Distributor (FD) to adjust the fuel/air ratio. The only other output signal is to the relay that switches the air injection pump on & off. Inputs are O2 sensor, engine speed, coolant temp, air temp (some models), baro pressure, air flow sensor position, WOT & idle throttle position, and vehicle speed.
The "programming", such as it is, is fixed, and is non-adaptive. What you see is what you get, installed by Bosch, with no provision for field boot-up or re-boot. It either works, or does not.
On the later units, such as yours, the duty cycle can be determined by the use of the Bosch tester specific to the KE system.