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28th April 2012, 09:37 | #1 |
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Solenoid pinouts for auto transmission connectors
Hi Guys,
I'm trying to identify what pin does what for the two black cylinder connectors next to the battery for my 75 that is downshifting occasionally a little rough. The transmission fluid had been replaced and no fault codes come up on a T4, however I'd like to rule out any dodgy solenoids. I have found the drawing for the freelander transmission harness connector showing 18 pins however not sure how that relates to the two 10 pin connectors I have which have 10 wires in the front one and 8 in back one? |
28th April 2012, 15:19 | #2 | |
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28th April 2012, 15:52 | #3 |
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MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009
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Violent gear changes are usually (but not always) down to the 2/4 Brake Duty Solenoid.
I have had situations where a faulty Solenoid won't always display a fault code, especially if the fault is intermittent. |
28th April 2012, 20:33 | #4 |
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rover 75 v6 Auto Conn. SE 54 plate LPG and 2006 Rover 75 v6 Auto LPG , 1.8 r75 Manual Join Date: Aug 2010
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Is this any good, just bumped into it whilst reading another thread.
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29th April 2012, 01:56 | #5 |
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Thanks for your help guys, I've attached a picture of the connector i've pulled apart for anyone interested. Unfortunately all the resistances fall within range so maybe not an easy fix. Now i'm wondering should I replace the 2/4 duty solenoid or all of them given they may be intermittently stuffed or keep driving it until something goes bang-pop. Its bringing up no fault codes just the occasional thump in an upshift 4-3 and sometimes thumps 2-3 but then other times shifts are fine. Temperature seems to make no difference. I will check the loom for any wires chafing.
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22nd July 2012, 20:40 | #6 | |
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checking solenoid resistance
Quote:
I further assume no actual gear selection is required or 12 volt power required as the battery has been removed. The more detail the better!! Thanks Simon |
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22nd July 2012, 20:50 | #7 | |
This is my second home
MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009
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Quote:
All resistance checks done can be done without the battery fitted & without the need to move the gear selector at all. Test as per chart (1 & 2, 3 & 4 etc) Just compare readings with the chart above. Good luck. |
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