2001 Volvo S40 ECM for immobilizer, engine relay fuse keeps

2001 VOLVO S40
99,000 MILES • 4 CYL • 2WD • AUTOMATIC
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MY2CARPROSID
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It starts in July. The car suddenly did not start. I took it to Pepboys. It turns out that the fuse located in engine compartment, no. 11, 20 amps, which is labeled "ecm for immobilizer, engine relay" was out.

they replaced it but they told me if it kept blowing up, they need to change the starter.

about a month later in august, my wife could not start the car during day time. I replaced the fuse at night and everthing went well.

Today, i drove to the beach about 4 hours, then made 3-4 little stops. suddenly the fuse failed again. i immediately change the fuse. but it failed right away. Then, i waited for 1.5 hours to let it cool down, change the fuse and now it works like nothing happened.

i do not believe that Pepboys is correct that my starter need to be replaced because the starter fuse is 40 amp. It must be that either the engine relay or ecm for immobilizer that needs to be replaced.

what do you think?
Sep 25, 2010 at 9:24 PM
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JIS001
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You need to take it in to a shop so that they can diagnose where the short circuit is.
Sep 26, 2010 at 9:48 PM