Re: Jaguar XJ V8 4.0 ,1998, BC engine. Code U1135 help please.FIX.....sort of. Archived Message
Posted by Martin Kelly on March 31, 2008, 8:27 pm, in reply to "Re: Jaguar XJ V8 4.0 ,1998, BC engine. Code U1135 help please."
Hi, got back on to this last week. I found that the coils had no 12v supply, it comes through a standard 4 pin relay and all the wiring was good except I suspected the earth switching which went to the ECU. So I removed this wire from the relay and added an earth direct to chassis - hey presto power at the coils and it started perfectly. I checked all 8 earths out of the ECU and all are good so am I correct in my assumption that the ECU is at fault or have I missed something? I drove car all last weekend and it starts and runs fine and because the customer only wants it running to trade in I'm inclined to leave it as it is. Every time it starts up the orange and red warning lights and "Engine Failsafe Mode" come on for about 1 - 2 miles then all go out, no codes logged, could this be due to my wiring bypass? Martin.
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