Hi All,
I’m new here but seem to be having a slightly unique problem with my daughter’s 500c Dualogic.
We purchased the car and all was fine, carried out full service, new brakes etc and all was good.
After having the cam belt and aux belt replaced we developed a problem with clutch overtemperature warning coming on after 5 miles or so of driving.
Mechanics took the car to an auto specialist who reprogrammed everything and said it should be fine. A few days later if came back with clutch overtemperature again. We were given an estimate of £3k to replace clutch and seals on gearbox which they said was leaking. We declined and I collected the car.
I took the car to another reputable auto specialist who read the codes which were P2912-98 clutch sub system. Can’t find any better info anywhere about that particular code. Anyway it also showed brake fault and voltage issues with start stop temporarily disabled, he suggested fitting a brake light switch and check the battery. It turned out it had the wrong battery and the brake switch was indeed faulty. These were both replaced. Car drove much better and had significantly more power ( assume brake switch causing issue) however, after 10miles clutch overtemperature.
The guy recommended a new clutch which was fitted with new fork, bushes and seals were checked with no leaks, turned out selespeed unit had new accumulator and sensors fitted in end of 2021. All reprogrammed and driving like silk but still coming up with clutch overtemperature warning.
I decide to get Multiecuscan and the leads and have a look myself. I’m reasonably competent with a set of spanners and like to problem solve.
On scanning the car I found the P2912-98 code and an over voltage on a circuit for the BCM, I cleared the faults and none showed again. I scanned all the modules and not all were able to connect, airbag showed a failure to connect as did IPC did a little searching and found that earthing could be the problem.
I started by checking the earth connections to the engine and gearbox, these were corroded and loose. I stripped and replaced these with new and went over the engine bay and interior cleaning and reseating the earths. This seemed to work wonders ,on turning the key the whole dash lights up with every pre start check light and all cleared on starting. All modules present on Multiecuscan and all showing no faults.
New problem is now the car selects neutral,first or reverse and drives in motion gears but will not go up through the box, it just stays in first. If you try to operate manually it says operation not admissible.
It allows the service final calibration and shows correct in the status however when you start the car it immediately operates the clutch several times as if doing a clutch drain and then will only select first, neutral or reverse and the status of the self calibration changes to not completed.
Has anyone got any ideas ? It seems like an electrical gremlin to me but how do you trace it when there are no fault codes and everything says that is has full functionality. Could it need a new TCM? This will have been reprogrammed dozens of times now.
Any help will be greatly appreciated.
Thanks in advance.
I’m new here but seem to be having a slightly unique problem with my daughter’s 500c Dualogic.
We purchased the car and all was fine, carried out full service, new brakes etc and all was good.
After having the cam belt and aux belt replaced we developed a problem with clutch overtemperature warning coming on after 5 miles or so of driving.
Mechanics took the car to an auto specialist who reprogrammed everything and said it should be fine. A few days later if came back with clutch overtemperature again. We were given an estimate of £3k to replace clutch and seals on gearbox which they said was leaking. We declined and I collected the car.
I took the car to another reputable auto specialist who read the codes which were P2912-98 clutch sub system. Can’t find any better info anywhere about that particular code. Anyway it also showed brake fault and voltage issues with start stop temporarily disabled, he suggested fitting a brake light switch and check the battery. It turned out it had the wrong battery and the brake switch was indeed faulty. These were both replaced. Car drove much better and had significantly more power ( assume brake switch causing issue) however, after 10miles clutch overtemperature.
The guy recommended a new clutch which was fitted with new fork, bushes and seals were checked with no leaks, turned out selespeed unit had new accumulator and sensors fitted in end of 2021. All reprogrammed and driving like silk but still coming up with clutch overtemperature warning.
I decide to get Multiecuscan and the leads and have a look myself. I’m reasonably competent with a set of spanners and like to problem solve.
On scanning the car I found the P2912-98 code and an over voltage on a circuit for the BCM, I cleared the faults and none showed again. I scanned all the modules and not all were able to connect, airbag showed a failure to connect as did IPC did a little searching and found that earthing could be the problem.
I started by checking the earth connections to the engine and gearbox, these were corroded and loose. I stripped and replaced these with new and went over the engine bay and interior cleaning and reseating the earths. This seemed to work wonders ,on turning the key the whole dash lights up with every pre start check light and all cleared on starting. All modules present on Multiecuscan and all showing no faults.
New problem is now the car selects neutral,first or reverse and drives in motion gears but will not go up through the box, it just stays in first. If you try to operate manually it says operation not admissible.
It allows the service final calibration and shows correct in the status however when you start the car it immediately operates the clutch several times as if doing a clutch drain and then will only select first, neutral or reverse and the status of the self calibration changes to not completed.
Has anyone got any ideas ? It seems like an electrical gremlin to me but how do you trace it when there are no fault codes and everything says that is has full functionality. Could it need a new TCM? This will have been reprogrammed dozens of times now.
Any help will be greatly appreciated.
Thanks in advance.
