Testing a CPS for vito 113 petrol bus
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What are the symptoms?
113 what wont start, All plugs are fine, Cps lead as earth source and voltage checked, something has turned off fuel, the pump is apparently a new one, The fuel pump is initializing, I can here it, but then something must be switching it off when turning over, can the camshaft position sensor warning turn it off? its a new sensor but not a bosch
E270 Owner
MB Enthusiast
- Joined
- Feb 8, 2007
- Messages
- 20,650
- Location
- Portsmouth, Hampshire.
- Car
- E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
Check the wiring firstly.
The engine control unit is under the right headlamp. They do tend to get wet.....
The engine control unit is under the right headlamp. They do tend to get wet.....
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The fuel pump will turn off if it does not receive an ignition signal. Check the wiring as BlackC55 suggests
- Joined
- Feb 8, 2007
- Messages
- 20,650
- Location
- Portsmouth, Hampshire.
- Car
- E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
Check the wiring first before doing anything else.
panason1c
MB Enthusiast
There are TW0 sensors, Crankshaft sensor and Camshaft sensor.... might be the wrong one you changed?
- Joined
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- E55K SL500 E250X2 Smart44 Brabus Track car E450Cabriolet X350 Pick up
Welcome to the 638.
panason1c
MB Enthusiast
A possible indication of Crankshft position sensor failure is to check if the rev counter needle 'bounces' slightly during cranking the engine, if it doesnt move at all then I would suspect a faulty crank sensor.
Just an afterthought..... If it was ok before it was laid up and then left for 12 months you might have had a family of 'squatter' mice moved in and made a meal of some wiring...... so, as suggested, check the wiring (as well as the aforementioned test)
Just an afterthought..... If it was ok before it was laid up and then left for 12 months you might have had a family of 'squatter' mice moved in and made a meal of some wiring...... so, as suggested, check the wiring (as well as the aforementioned test)
Last edited:
E270 Owner
MB Enthusiast
I will check, also didnt mention, when trying bump it didnt start but after 15 mins towing to new home i tried again and it started? Sounded a bit like a miss fire a bit but drove home, now back to not starting turning over i cracked open fuel on injector rail and no fuel turning over
According to USER e270 owner, the crankshaft sensor should be giving out 0.2-2 ac volts when cracking, I don't get any signal at all, when I connect 2 wires with sensor on get nothing, when I go direct to the wire on its own I get nothing, no volts, no signal, again the sensor reads 676 ohms
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