Bosch 0281 010 927 Passed Our Tests; This Mercedes Vito’s Fault Lay in the Wiring

Our tests found the Bosch 0281 010 927 from this Mercedes Vito functioning correctly, so the unit was sent back to the customer as “No Fault Found”. Afterwards, an auto-electrician carrying out a wiring continuity test found a wiring fault, and all the problems were fixed. On this job, our testing cleared the ECU instead of condemning it.

The record gives the unit’s type as Bosch EDC15C0, and Bosch numbers of that diesel engine ECU type sit in the EDC15C0 table we keep for Mercedes-Benz diesels.

Smoke, a misfire and the garage’s power-supply code

Smoking excessively and misfiring: that was how the vehicle was behaving when its ECU was sent to us. A local garage had diagnosed the fault from a fault code that, on the garage’s reading, related to a power supply. The unit came to us for testing and repair.

Sending the ECU for testing was a sound way to settle whether it had any part in those symptoms.

Injector drivers, simulated functions, then over 24 hours running

Every engine ECU we receive arrives by post, wherever in the UK it is sent from. It is logged, inspected and electrically tested, then taken through diagnostics specific to the reported fault.

This unit was working as it should. All the injector drivers were okay, and we simulated all of the ECU’s functions as though it were fitted to the vehicle.

We then cleared the codes and ran the ECU on a test bench for over 24 hours. It passed, with no logged faults. That run, and the tests before it, are what the result rests on.

Cleared on the bench, so nothing to repair

With nothing found inside this ECU, we made no repair to it. What the customer received from us was a finding: the unit worked, on every test we ran. The pass did not say where this Vito’s fault lay; it said where it did not.

Findings come first under our process, and chargeable work waits until the customer has them and gives the go-ahead. Any repair we make is guaranteed by us over a 24-month term, for the work itself, and no one but the sender holds that guarantee. This ECU had no repair, so that guarantee did not come into it.

Our tests were made with the ECU off the vehicle, and they showed no fault in the unit. With the ECU cleared, the search went back to the vehicle. The wiring continuity test that found the wiring fault was a separate piece of work, done afterwards by an auto-electrician.

Details on record for 0281010927

On record, 0281010927 is tied to a Mercedes Vito. The same number has a 2.2-litre engine size on record. A 000 153 59 79 is the Mercedes number given with it on record.

If you are checking a unit against these details, they describe the number, not the condition of that ECU. Only testing answers whether it is faulty; on this job, testing found no fault.

Quotes start from our Repair Form. Pages for further Mercedes-Benz engine ECUs sit beneath the Mercedes make hub, and What We Repair describes a range of engine ECUs from other makes.