Mo420
Member
- Joined
- Apr 17, 2014
- Messages
- 31
- Location
- Brunei
- Car
- '95 W202 C180, '97 W208 CLK320, '06 W639 Viano, '13 GT86, '07 RX300, '09 W211 E230, '15 Jaguar XF
Hi all!
My 2006 W639 Viano LWB 2.2CDi with 62k kms on the clock has got its instrument cluster/speedometer spooked somehow.
So last week I sent the Viano for some minor detailing work (compound polish, seal and wax) as its been a while since it was last detailed. The van was just as usual, acting fine on the way home.
Next day, took the van for a drive. Was only driving for a couple of minutes when this happened - I was lightly depressing the brakes to slow down at a junction when I noticed the dash lit up with multiple warnings - ABS light, ASR traction light, ASC triangle (skid control) light, and brake pad wear warning.
All warning lights remained even after releasing brake pedal. Moreover, the speedometer was going crazy - the analog speed dial and the digital display would intermitently just jump to random speeds - say I was maintaining 80kmh then intermittently the speedo would jump to 100-120kmh for a few seconds and then goes back. Then jumps to 180-200kmh. Then back. etc.
I notice this random speedo reading happens the moment I switch on the ignition, without starting. However when in Park, only the ASC warning lights up (see pic). Once Drive is engaged, all the ASC ASR ABS and Brake Pad Wear warning will show.
Searched around for possible causes - saw some W221s with same issues which turned out to be wheel speed sensors.
Sent the car to an indy yesterday for diagnosis - came back with ABS module code . Also, Im not sure what kind of diagnosis software they were using however they managed to show me live data of wheel speeds - all wheels remained at 0kmh when the speedo showed random speeds (was stationary at that time) - this indicates its not the wheel speed sensors?
Saw a couple of 639 owners having same warning lights as a result of brake switch malfunction - however this doesnt explain the bonkers speedometer.
Any suggestions on possible causes highly welcome and very much appreciated. Tried cleaning the ABS pump connections and the engine earthing points with contact cleaner to no avail.
I'm hoping to skip the dreaded trip to the stealerships this time around - fingers crossed (just paid an arm and leg for diagnosis last month for an EGR issue).
Cheers,
Mo420
My 2006 W639 Viano LWB 2.2CDi with 62k kms on the clock has got its instrument cluster/speedometer spooked somehow.
So last week I sent the Viano for some minor detailing work (compound polish, seal and wax) as its been a while since it was last detailed. The van was just as usual, acting fine on the way home.
Next day, took the van for a drive. Was only driving for a couple of minutes when this happened - I was lightly depressing the brakes to slow down at a junction when I noticed the dash lit up with multiple warnings - ABS light, ASR traction light, ASC triangle (skid control) light, and brake pad wear warning.
All warning lights remained even after releasing brake pedal. Moreover, the speedometer was going crazy - the analog speed dial and the digital display would intermitently just jump to random speeds - say I was maintaining 80kmh then intermittently the speedo would jump to 100-120kmh for a few seconds and then goes back. Then jumps to 180-200kmh. Then back. etc.
I notice this random speedo reading happens the moment I switch on the ignition, without starting. However when in Park, only the ASC warning lights up (see pic). Once Drive is engaged, all the ASC ASR ABS and Brake Pad Wear warning will show.
Searched around for possible causes - saw some W221s with same issues which turned out to be wheel speed sensors.
Sent the car to an indy yesterday for diagnosis - came back with ABS module code . Also, Im not sure what kind of diagnosis software they were using however they managed to show me live data of wheel speeds - all wheels remained at 0kmh when the speedo showed random speeds (was stationary at that time) - this indicates its not the wheel speed sensors?
Saw a couple of 639 owners having same warning lights as a result of brake switch malfunction - however this doesnt explain the bonkers speedometer.
Any suggestions on possible causes highly welcome and very much appreciated. Tried cleaning the ABS pump connections and the engine earthing points with contact cleaner to no avail.
I'm hoping to skip the dreaded trip to the stealerships this time around - fingers crossed (just paid an arm and leg for diagnosis last month for an EGR issue).
Cheers,
Mo420
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