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kuga 1 U=15,3V

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kuga 1 U=15,3V

Mesajde miculas » 21 Mar 2020, 23:28

Buna! Din nou cu vechea problema nerezolvata.
Dupa pornire (de obicei prima a zilei, dar nu e regula), dupa cca 30sec de rulare, toate calculatoarele masinii intra in protectie de supratensiune pe rand. Tensiunea afisata 15,3v. Fenomenul apare cand decelerez. Ca sa pot circula trebuie sa pornesc toti consumatorii mari(faruri,a/c, rezistentele din parbriz si luneta). Dupa un timp cca 5 min functioneaza impecabil. Am schimbat alternator, bordul, computerul ambiental in garantie si recent PCM-ul pe cont propriu. Totul a inceput la 2 ani (Am avut garantie extinsa). Tot au lalait-o pana am iesit din garantie cu problemele nerezolvate, nu-i intereseaza efectiv. Am pus baterie AGM (are voltaj mai mare),care a redus putin intensitetea crizelor. Sunt perioade de ordinul lunilor cand nu are nici un simptom. Are cineva idee ce ar putea fi?
In ce masura e implicat PCM-ul in reglarea tensiunii pe alternator?
miculas
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Membru din: 26 Dec 2013, 07:40
Maşina: Ford

Re: kuga 1 U=15,3V

Mesajde jeffe » 22 Mar 2020, 02:24

Greu de diagnosticat. PCM-ul comanda alternatorul, dar si GEM-ul este important, mai ales cand el nu comanda automat consumatorii mari pentru a proteja calculatoarele.
Ai masurat tensiunea de alimentare de pe GEM?
Masina ta este echipata cu BMS? Ce an e?

Description and Operation
General information

The powertrain control module (PCM) controls the alternator charging voltage. The connection between the PCM and the generator is made via the control module subnetwork (LIN) bus.
If the load on the alternator is high, the PCM can increase the idle speed.
The alternator is temporarily deactivated during engine starting so that the engine drag moment is minimized and it is reactivated again after the starting procedure.
The PCM controls the charge control lamp in the instrument cluster via the controller area network (CAN) bus.

Smart Charge system
In addition to the familiar functions, the Smart Charge system also performs the following functions:
- Automatic deactivation of non-critical high power electrical consumers when the battery voltage is low in order to reduce the level of current drawn.
- Automatic activation of non-critical high power electrical consumers when the battery voltage is excessively high in order to protect components which are sensitive to increased voltages.
The battery charging current is optimized through continuous calculation of the battery temperature and monitoring of the alternator output voltage.
By receiving the forwarded alternator load signal, the PCM is given early warning whenever an electric consumer is switched on or off. This means that the PCM receives information about imminent changes in the torque drawn by the alternator. By evaluating this information the PCM can provide a higher level of idling stability.

The two remaining functions of the Smart Charge System are controlled by the GEM.

Electrical consumers are switched off due to low voltage when the GEM determines (on the basis of the message received from the PCM on the CAN bus via the instrument cluster) that the battery voltage has dropped below the threshold.

When the threshold for low battery voltage is reached the GEM automatically deactivates the following consumers - in this order and with a gap of 5 seconds between each:
- Electric booster heater (vehicles with diesel engines)
- Heated exterior mirrors
- Heated rear window
- Heated windscreen

If the battery voltage rises back above the lower threshold then the GEM re-enables all of the electrical consumers which were previously disabled. They then have switched off status and must be switched back on by the driver.

Electrical consumers are switched on due to excessively high voltage if the GEM determines that the battery voltage is above the threshold for overvoltage and the charge control lamp has been switched on.
When the threshold is reached the GEM automatically activates the following consumers - in this order and with a gap of 5 seconds between each:
- Heated rear window
- Heated exterior mirrors
- Electric booster heater (vehicles with diesel engines)
- Blower motor
If the battery voltage drops back below the threshold then the GEM automatically deactivates any consumers that were switched on. However, if they were switched on by the driver before the automatic activation, they will then be switched on again in turn with a 5-second time interval.
2016 Mondeo Mk5, Titanium, 2.0L Duratorq-TDCi (180CP), PowerShift, Deep Impact Blue (Metallic)
2015 Mondeo Mk5, Titanium, 2.0L Duratorq-TDCi (180CP), PowerShift, Frozen White
2015 Kuga Mk2, Titanium, 2.0L Duratorq-TDCi (180CP), PowerShift, White Platinum
2009 Mondeo Mk4, Titanium S, Break, 2.2L Duratorq-TDCi (175CP), M66, Sea Grey (Metallic)
2006 Focus Mk2, Trend+++, 3 doors HB, 2.0L Duratec-HE (145CP), AT 4F27E, Panther Black (Metallic)
Mondeo Mk3 2007, Mondeo Mk4 2010, Mondeo Mk3 2001, Mondeo Mk4.5 2011, Kuga Mk1 2011
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jeffe
 
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Maşina: Mondeo Mk5 2015, 2.0 TDCi 150CP, Titanium
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