Smart Roadster help needed please

[tellfaia]

Hi to all, i have a strange smart that came in, so, someone decided to jump start the car and swapped the cables, off course alternator and some other stuff blew up, i?ve managed to start the car the alternator and the starter its fine, but the car wont rev, and code p2042 throttle signal not correct kicks in:( so result no throttle, i?ve check resistance, continuity, swapped both (new throttle body) and ecu and the result its the same, no matter how many throttle bodys i use (and i?ve used 3 already) the car revs for about 20 sec and never again:( except for now and then it starts to rev again but just for a few seconds...

Any help appreciated

[genius76]

more details about car pleasw

[audiomeca]

Hello

yes a comun problem in this car when swap starterd polarity. You need a spare ecu engine. find a used ecu, and recode the keys with star diagnose. or change the eeprom chip 24c02 from burmed ecu to the spare

regards

[genius76]

Hello

yes a comun problem in this car when swap starterd polarity. You need a spare ecu engine. find a used ecu, and recode the keys with star diagnose. or change the eeprom chip 24c02 from burmed ecu to the spare

regards


swapped both (new throttle body) and ecu and the result its the same,

by au data P2042 Reductant Temperature Air Pressure Sensor Circuit

by mb dtc P2042 check B37 (accelerator pedal position sensor).Sensor 1 signal voltage too high.
P2042 check B37 (accelerator pedal position sensor).Sensor 1 signal voltage too low.
P2042 check B37 (accelerator pedal position sensor).Sensor 1/2 reliability
P2042 check B37 (accelerator pedal position sensor).Sensor 2 signal voltage too high.
P2042 check B37 (accelerator pedal position sensor).Sensor 2 signal voltage too low.
P2042 check B37 (accelerator pedal position sensor).Sensor voltage supply
P2042 fuel safety cut-off unit recognized
P2042 Safety fuel shutoff detected
P2042-001 M16/6 (throttle valve regulation part),practical potentiometer 1 (http://rover.ebay.com/rover/1/711-53200-19255-0/1?toolid=10029&campid=CAMPAIGNID&customid=CUSTOMID&catId=293&type=2&ext=350808401892&item=350808401892) and 2:signal voltage error or regulation malfunction

[tellfaia]

Hello

yes a comun problem in this car when swap starterd polarity. You need a spare ecu engine. find a used ecu, and recode the keys with star diagnose. or change the eeprom chip 24c02 from burmed ecu to the spare

regards

thanxs for your answer, but i?ve done that already:( still the same result...

[tellfaia]

by au data P2042 Reductant Temperature Air Pressure Sensor Circuit

by mb dtc P2042 check B37 (accelerator pedal position sensor).Sensor 1 signal voltage too high.
P2042 check B37 (accelerator pedal position sensor).Sensor 1 signal voltage too low.
P2042 check B37 (accelerator pedal position sensor).Sensor 1/2 reliability
P2042 check B37 (accelerator pedal position sensor).Sensor 2 signal voltage too high.
P2042 check B37 (accelerator pedal position sensor).Sensor 2 signal voltage too low.
P2042 check B37 (accelerator pedal position sensor).Sensor voltage supply
P2042 fuel safety cut-off unit recognized
P2042 Safety fuel shutoff detected
P2042-001 M16/6 (throttle valve regulation part),practical potentiometer 1 (http://rover.ebay.com/rover/1/711-53200-19255-0/1?toolid=10029&campid=CAMPAIGNID&customid=CUSTOMID&catId=293&type=2&ext=350808401892&item=350808401892) and 2:signal voltage error or regulation malfunction

hi genius, i?ve changed the pedal and the throttle body, both new and still got the same error after start, by the way its a smart roadster 700cc 82hp 2003, i?ve also checked the mb step by step and all seems ok except for the throtlle angle that it is 0? when tested

[tellfaia]

and another thing, in the live data the accelerator its ok all the way, may the alternator cause this? And do you know weres the Fuel shutoff (if it has one)

[southerndragon]

Well mate I don't know much of that car, but some time ago I fixed a Nissan with a similar problem. It turned out to be a fuse for the electric throttle Valve. The ECM receives 12V from this fuse and then activates the 2 wired motor inside the ETV.

[Meat-Head]

If orginal dynamo what is it kicking out

[tellfaia]

Well mate I don't know much of that car, but some time ago I fixed a Nissan with a similar problem. It turned out to be a fuse for the electric throttle Valve. The ECM receives 12V from this fuse and then activates the 2 wired motor inside the ETV.

i have 12v in if i floor it when i start the car the car will rev for a sec but thats it, so i presume its a signal problem instead a feeding problem

[Meat-Head]

Pins inthrotttke bidy pluhg? Ishit

[audiomeca]

Hello

In my car with this problem (jump start reverse), I replace ecu, alternator, sam, clunck actuator

try to replace the alternator, is very rare that the alternator is ok.

regards

[audiomeca]

and another thing, in the live data the accelerator its ok all the way, may the alternator cause this? And do you know weres the Fuel shutoff (if it has one)


the fuel shutoff is made by the sam, check all fuses in the top have 4 big fuses,50A and 30A. if already fuses ok you need check the fuel punp, need unmount the fabric in the trunk area (convertible top motor zone)

regards

[tellfaia]

thanks you all for your help, i?ve repaired the alternator, and another thing the car doesnt stall, it just doesnt accelerate, i?ve also checked the throtlle pins for loose connections:(

[genius76]

did you measure signal changes or not on throttle pins when accelerating

i mend by multi tester not by obd

[southerndragon]

I would trace new wires from the ECM to the TPS and to the APS, maybe a melted wire is the problem.

[jebo]

and another thing, in the live data the accelerator its ok all the way, may the alternator cause this? And do you know weres the Fuel shutoff (if it has one)

hi,

maybe this could help a little in your troubleshooting.
FQ101.co.uk - fortwo 450 (http://www.fq101.co.uk/how-to-guides/fortwo-450.html)
http://www.evilution.co.uk/

[tellfaia]

I would trace new wires from the ECM to the TPS and to the APS, maybe a melted wire is the problem.

that would be my next step will post results

[gooroo]

Hi Tellfaia, old thread but I have smart with same fault, did you fix yours? I don't want to change ECU, throttle and pedal to find I still have same problem.

I tried PM but I think my post count is too low :)

Regards, Simon

[smart123456]

Hi to all, i have a strange smart that came in, so, someone decided to jump start the car and swapped the cables, off course alternator and some other stuff blew up, i?ve managed to start the car the alternator and the starter its fine, but the car wont rev, and code p2042 throttle signal not correct kicks in:( so result no throttle, i?ve check resistance, continuity, swapped both (new throttle body) and ecu and the result its the same, no matter how many throttle bodys i use (and i?ve used 3 already) the car revs for about 20 sec and never again:( except for now and then it starts to rev again but just for a few seconds...

Any help appreciated

Hi,
I have P2042 with my Smart Roadster, Did you find this fault?

[Manuelgb]

Hi, I have the same problem P2042. wiring check, butterfly body fitted, ecu changed. accelerator pedal changed.
Some help ?