Bosch EDC15C Engine ECU Repairs

Type: Bosch Engine Management
Fits: Fiat
Engines:
Year:
Fuel: Diesel
Ref: ECUT15250

Note: This ECU may also fit other models.

Matching a Bosch EDC15C to this page is simpler than on most of our part-number pages. There are four rows, four sets of cars, and no car recorded against more than one row. What can still go wrong is specific enough to list, so the sections below name the four slips worth avoiding before a unit goes in the post.

Four rows and the cars behind them

Every row in our table pairs a Bosch number with an eight-digit OEM number, and each pairing is confirmed across independent records. All four units are diesel, from JTD common-rail engines.

• 0281001879 with 46479993: Fiat Multipla 1.9 JTD
• 0281001928 with 46546205: Fiat Bravo, Brava and Marea 1.9 JTD
• 0281001936 with 46753569: Alfa Romeo 145 and 146 1.9 JTD
• 0281010022 with 46774779: Alfa Romeo 156 2.4 JTD

Read down the list and each car points to a single row. That is less common on our part-number pages than it sounds, since one car often leaves several numbers in play, and it means knowing the car takes you to one pair before you have looked at the case. The case is still what we identify the unit by.

Slip one: taking the Fits line at its word

The spec line at the top of this page reads Fits: Fiat, and stops there. Two of the four rows in the table are Alfa Romeo: the 145 and 146 row, and the 156 row. An Alfa owner who reads no further than the spec line leaves too early.

What the two makes have in common on this page is the numbering. The OEM number on every row has the same eight-digit format beginning 46, on the Alfa Romeo rows exactly as on the Fiat rows, so the table reads as one set. The spec line is the short version; the table is the full one.

Slip two: counting badges instead of rows

Seven model names are spread across four rows. The Fiat Bravo and Brava share one, 0281001928 with 46546205, and the Fiat Marea 1.9 JTD is recorded on that same row. The Alfa Romeo 145 and 146 share another, 0281001936 with 46753569.

Two badges on one row are not a sign of a gap in the table, and nothing we hold splits them. In our records a Bravo, a Brava and a Marea all carry the same pair, and so do a 145 and a 146.

One difference is worth knowing. The Marea turns up on that row in fewer records than the Bravo, so if the unit came out of a Marea, give the label a second look before you post it.

Slip three: reading every JTD as a 1.9

Three rows come from 1.9 JTD engines. The fourth, 0281010022 with 46774779, is recorded only against the Alfa Romeo 156 2.4 JTD, the five-cylinder, and it is the only 2.4 in the table. The model name is not enough on its own here: the engine size has to match as well.

That row hides a reading slip as well. The other three Bosch numbers begin 0281001; this one begins 0281010. After the 0281, the same three digits appear in a different order, which is easy to miss at a glance. Copy it out in full rather than from memory.

Slip four: quoting one number when the label carries two

On this page both columns identify the unit. The Bosch number and the OEM number are confirmed as a pair on all four rows. Not every part-number page we publish can say that; on some, OEM cells are left blank.

So copy both, digit for digit, exactly as the label prints them. A pair that matches a row leaves nothing to interpret. If only one number matches, or the label shows a number our table does not hold, send it as it reads and we will check it against our records rather than guess.

Once the unit reaches our workshop

An EDC15C posted to us is booked in against the numbers you gave, looked over and tested electrically, then diagnosed against the fault you reported. Nothing is sent out: the engineers, the workshop and the equipment are our own, here in the UK.

You then hear what we found and what the repair involves, with a quote, and no chargeable work begins until you agree to it. Faulty components on the board are traced and renewed one by one under a microscope, using temperature-controlled rework equipment, and the unit must pass a final test before it leaves. It comes back as the same ECU that came out of the car, with a 24-month warranty on the repair.

We work by post from anywhere in the UK. Note both label numbers, the car with its engine size, and how the engine has been behaving, then hand us the pair through the Repair Form.

Only two rows here are Fiat. For a Fiat unit that is not among them, look through the Fiat engine ECUs past these two rows; for an Alfa Romeo, the Alfa Romeo units this table stops short of. If the car is neither, start from whichever make the unit really came from.

The four rows are below, Bosch number first, with the OEM number beside it.

Common part numbers associated with this type of unit