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28th July 2019, 19:27 | #1 |
Gets stuck in
Mazda cx7/1979 T140e Join Date: Jul 2010
Location: Kent
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Memory seat issues not able to resolve
Hi,
I cant get my drivers seat to work at all, I have replaced the seat control ecu with a known working one, no luck. Replaced the complete seat with a known working one, no luck. The only common theme is that the memory button sounds once if pressed and held for a while, which is the same with my original seat, the replacement seat control ecu, and the complete replacement seat. This is driving me mad (excuse the pun) , as the cars mot has expired, so I cant get it to a T4 guru, and I only have a few days left before it has to sit a new mot again. Any ideas? Thanks Paul |
28th July 2019, 19:34 | #2 |
Gets stuck in
MG ZT Join Date: Apr 2018
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Sorry, forgot what I was going the say.
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gnu |
28th July 2019, 20:02 | #3 |
This is my second home
Rover 75 Saloon & Tourer Join Date: Sep 2012
Location: Lincoln
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Is power getting to the switches?
macafee2 |
28th July 2019, 20:08 | #4 |
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Rover 75 Join Date: Nov 2010
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Seeing as time is against you. I would get a plug from the scrapyard and wire in a temp loom to allow seat movement, at least this will get you the mot.
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Lest we forget..
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28th July 2019, 20:09 | #5 |
Gets stuck in
Mazda cx7/1979 T140e Join Date: Jul 2010
Location: Kent
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Seat power
Thanks for the reply,
I did put a (borrowed) multimeter on a few pins on the main loom,and got 12+volts, but not sure where/how to check if the seat switches are getting any power, I did presume some power was getting there as the memory button sounds when held. |
29th July 2019, 21:54 | #6 |
Avid contributor
Rover 75 CDTI Tourer Automatic Join Date: Mar 2015
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This is a document I drew up when faultfinding on mine. Hope it helps you as well.
IGN on Test thick wires on the loom plug Black = earth Yellow = earth Orange/Yellow = 12v Orange/Green = 12v Orange/white = 12v Thin Slate/Grey = earth this is how my wiring loom works out driver seat pin 1 thick yellow=heated seat=Earth to Thin Yellow pin 2 thick orange/white=heated seat=Live to Thin orange/white pin 3 thick black=earth to same pin 4 thick orange/yellow=live to same pin 5 thin purple/grey=live to Thin brown/white pin 6 thin red/white/=k bus to Pink pin 7 thin black/grey=logic earth to same pin 8 thick orange green=live to same SEAT SWITCH At the module connector. Using a suitable 12v supply and earth, and wires with probes suitable to hold in pin sockets (twisty bits of wire, matches, or cocktail sticks at your own risk Connect Black pin to earth. Momentarily Connecting 12v to Yellow/White pin , OR (not both) 12v to White/Yellow pin , will directly power the motor to move the seat forward/back, this will allow access to the seat mounting bolts. Momentarily Connecting 12v to the Yellow/Pink and Pink/Yellow pins will adjust the backrest if needed Black = Earth Yellow/White = Forward White/Yellow = Back Yellow/Pink = Backrest Pink/Yellow = Backrest
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300,000 miles and back on the road Jobs done: Everything you can possibly imagine ... I have the "Triggers Broom" of cars. Last edited by hortonds; 31st July 2019 at 18:01.. |
30th July 2019, 07:03 | #7 | |
This is my second home
Rover 75 Saloon & Tourer Join Date: Sep 2012
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Quote:
macafee2 |
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