hi people I'm new pcx 2016 just cut off

[kevgam]

hi people I'm new here,
i have a 2016 pcx 125 it just stopped running yesterday as i was riding along. i got it taken home and have had a look today. its got a spark and the fuel pump primes but then the spark goes and the fuel stops pumping.

i have removed the fuel pump and that runs and works. now when I'm cranking the engine i have no earth to the fuel pump the power side is fine, checked all the fuses and easy things.

does this bike have a crank shaft sensor? thanks kevin

[superandyp]

That is a pain. You say checked easy things, have you checked the battery. My thoughts were battery or alternator. Hoping it is the battery or something else simple

[aguim]

Like other FI Hondas, it should have a Crank Position Sensor (Forza's is 110 ohms, 1.6 Vac @ cranking
speed, easy to check with a multitester). They're all +/- built the same, so should have similar specs.

With this sensor defective, there's no spark, no fuel injection (yet it may work for a few seconds
before giving up). Initial pump action is pre-programmed in the ECU and lasts about 2 secs. You'd
need a wiring diagram to see clear through this, but it's fairly easy to locate the sensor's wiring
and test it.

[aguim]

UPDATE

If it has the Stop/Start system, its Crank Pos. Sensor is one complicated, multi-wire gimmick,
much more sophisticated in operation (just had a look at the corresponding diagram, available
online by googling 'pcx 125 wiring diagram'. Looks like this thing can't be tested without a
factory shop manual...

Does it show any fault code ?

[kevgam]

On the fault codes im getting one long blink then to fast ones after it. Yes i would say it has stop start. So is the prankshaft sensor apart of the start motor charging system system?

[kevgam]

Is there anyway i can do a diagnostics check on this bike where is the connector

[aguim]

Fault code #12 refers to INJECTOR, on both Hondas I own ( Giorno + Forza ).

- ECU can't diagnose a fuel pump problem.
- CKP problem may or may not have a code #, depending on year/model. If not, shop manual should
indicate resistance/Vac output specs.

You need a shop manual, or a competent dealer...

[rvkssl]

Hi,

According to the workshop manual you're having a fuel injector circuit malfunction, for troubleshooting send me a PM

[WhiteNoise]

Howdy kevgam, welcome aboard! Glad our mechanical tooling members have come along to help you get things sorted. I'd also try to get my hands on a shop manual - they are invaluable - best tool in the house!