406 odo problem

jonasy · Post by **jonasy** » 13 Jan 2006, 18:15

406 2.0 auto

hi, how ru doing

the odo shows: 100km
but actual running: 80-90km
what's the problem please?

recently,
1. I changed a new set of tyre, but same specification with original
2. changed a pair of new Borg Warner solenoid in automatic box, but did't update ECU so far, they are not compatible with present ECU version
I'm not sure if the these could cause the problem of odo?

thanx

pugxpert · Post by **pugxpert** » 15 Jan 2006, 17:21

i would check your drive in gearbox pinion and worm ,go to your dealer they can tell you on laser what should be fitted they are colour coded.The worm on al4 can be changed without stripping gearbox pop o/s seal out and 2 small thin screwdrivers to release worm.

jonasy · Post by **jonasy** » 18 Jan 2006, 13:13

pugxpert wrote:i would check your drive in gearbox pinion and worm ,go to your dealer they can tell you on laser what should be fitted they are colour coded.The worm on al4 can be changed without stripping gearbox pop o/s seal out and 2 small thin screwdrivers to release worm.

thanks
please tell in more details, where is the worm , how to find them? how to adjust? can it be fitted againest experience?
I have changed two solenoid valves of gearbox(open the cover, take down the valve body), is the problem caused by above procedures?

pugxpert · Post by **pugxpert** » 18 Jan 2006, 18:10

would not of thought that by changing valves would have effected speedo.worm is inside gearbo need to remove right driveshaft and oil seal then it can be removed or remove speed sensor and look down and count no of teeth on worm and pinion and check with your dealer that it is correct.the speedos are not accurate they always read a bit high in uk you can be doing 70mph on speedo but a gps will tell you that your doing 67mph

jonasy · Post by **jonasy** » 18 Jan 2006, 18:45

i checked at 60km/h(my car), it reads 56.

jonasy · Post by **jonasy** » 18 Jan 2006, 18:46

i checked at 60km/h(my car), it reads 56, but didn't count no. of teeth.
actually, my car has only run 50000km, so i'm not sure if the teeth damaged. It's unbelievable!

besides, should I consider the speed sensor is dirty?

what type of Bosch spark plug can be used instead of Eyquem RFN58LZ 101AB please?

pugxpert · Post by **pugxpert** » 19 Jan 2006, 07:49

if sensor was faulty you would have no speedo at all or needle would drop down and back up,sounds like your speedo is not out by very much i would not bother about it.

jonasy · Post by **jonasy** » 19 Jan 2006, 15:36

many thanks

the a/t output speed sensor send signal to engine ECU, if it's no problem, then, should I consider ABS sensor? because the total mileage(milemeter/odometer)showed on little LCD derives from the ABS signal.

pugxpert · Post by **pugxpert** » 19 Jan 2006, 17:07

not sure if you have speed sensor on gearbox it is hard wired to bsi if no sensor then it is sent via can bus. wheel size info is a configurable function in abs ecu .what year is your 406 is it a fully multiplexed version?

jonasy · Post by **jonasy** » 19 Jan 2006, 18:03

pugxpert wrote:not sure if you have speed sensor on gearbox it is hard wired to bsi if no sensor then it is sent via can bus. wheel size info is a configurable function in abs ecu .what year is your 406 is it a fully multiplexed version?

mine was built on june 2001, vin is VF3**************[VIN obfuscated, can be read by forum staff]
2.0 auto gasoine DAM is 8988
i think there is can-bus on my car(multiplexing), diagostic compuuter connect to my car to check everything. but there is also a speed sensor on gearbox shell.

jonasy · Post by **jonasy** » 23 Jan 2006, 04:44

pugxpert, are you in please?
besides, I changed a pair of new snail horn, which is bigger and different brand. if they would affect speedo signal?

pugxpert · Post by **pugxpert** » 23 Jan 2006, 07:51

what is a a snail horn some kind of french thing??

jonasy · Post by **jonasy** » 23 Jan 2006, 11:22

today i disconnected the speed sensor on gearbox, speedo and milemeter/speedometer don't work. then we can understand it is the signal source.
as well removed the worm for checking, seems no problem.
then????????????? is it the problem of speed sensor on gearbox? or gearbox?(i have changed two new solenoid valve for pressure control)

pugxpert · Post by **pugxpert** » 23 Jan 2006, 15:37

i think that there is nothing wrong with your car your speedo is working and is only out by a few km/per hour i would compare with another car or have speedo verified on a rolling road!

jonasy · Post by **jonasy** » 23 Jan 2006, 21:49

pugxpert wrote:i think that there is nothing wrong with your car your speedo is working and is only out by a few km/per hour i would compare with another car or have speedo verified on a rolling road!

but, the difference is too big between actual running and odometer shows, almost 20%.