XJ40 ( XJ81 ) 1986 - 1994

ECU Pinout for '87 XJ40 3.6

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Old 08-29-2012, 10:48 PM
keltik's Avatar
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Default ECU Pinout for '87 XJ40 3.6

Im thinking about putting my Link ECU into the Jag. I already have it running my daily driver and am recording better fuel economy and more power than the factory setup. All at the expense of emissions - theres no way in hell it would pass a pommy MOT.

I'd like to wire it in parallel to the Jags ECU and see what i can get out of it on the dyno. Also aiming to improve fuel economy but mainly i want a smooth idle and simple fault finding.

Can anyone shed light on any issues i may face? Ive got a couple of questions below but mainly will need an accurate pin-out diagram of the ECU.

1. I understand the 3.6 runs batch fire injection, are there 6 seperate injector ground wires run to the ECU or does it use one extra beefy driver to ground all 6? Id like to run sequential injection but cant be arsed running new wires.

2. Is there any knock detection? I havnt seen a knock sensor yet but havnt really looked.

3. Is there any interaction between the ECU and other modules? Dash/Trans/ABS signals that i might not be able to replicate.

4. Is there a cam angle or sync signal for the factory ECU or does it just run off crank angle and distributor? I guess the latter since you can adjust timing by shifting the crank angle sensor.

Cheers for help!
 
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