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19th December 2019, 17:52 | #281 | |
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6th January 2020, 15:32 | #282 |
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Back again..
So I am still fighting with the same issue, glow plug shorted to ground. Bought a working (tested) glow pin, and the problem remains. So as advised, measured every resistor and all are ok, so if anyone can help with the information how the measurement is provided from the BTS141 to IC, would be happy camper again. Datasheet explains how the short is detected within the BTS141, cutting the voltage down if a high current is measured, but still no idea how to approach this problem. There are few diodes from I pin that might be the cause, but still even with a schematic in hand, I need some help.. Measured also all 4 diodes, they are all fine.. all in the close area of the BTS.. Getting new BTS141 tomorrow, so lets see if that fixes the issue.. No go, new in place, still in WTT the value is 0.0005 in test mode, never changes BR Pete Last edited by Pete73; 8th January 2020 at 12:57.. |
8th January 2020, 14:27 | #283 |
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Ok, more info.
The CPU pin 19 is the one that measures voltage provided to this pin, this is the value that indicated the resistance of the glow pin, so a little closer now.. I think there is some component now that can not provide the proper voltage to this pin and as so the PWM value is not in range. Tolerance must be very small. If the WTT is in test mode and I run the test with glow plug, the resistance is at 0.005 without its 1.xx+ ohms, so it looks like a problem outside the ECU, and this is good news.. Fight continues.. |
12th January 2020, 12:37 | #284 |
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Ok, problem solved.
There was a cold joint on few resistors, so the values measured ok from top, but the connection to the circuit was lost. Ended up replacing several resistors + BTS141, now can enjoy a warm car again. Thank you FrenchMike!!! BR Pete |
17th January 2020, 16:09 | #285 | |
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Can you send me the rest of the schematic, please? I have already 2 boards with same error: Glow plug / flame monitor interruption. First is original from my car, second i bought from scrap. So now i have 2 defective controllers, none is working. Already tested al components i could see. Nothin wrong... Last edited by cosmin; 17th January 2020 at 17:14.. |
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17th January 2020, 18:26 | #286 | |
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Secondly, how did you post this from a Turkish prison.
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18th January 2020, 08:43 | #287 | |
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Mine had no contact to the circuit and after soldering it, dead, must had a crack in it... I used common THT resistors 1/4w, works like a charm. PM me your email, I have it. |
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18th January 2020, 08:46 | #288 |
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18th January 2020, 10:34 | #289 | |
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PM sent to you. Last edited by cosmin; 18th January 2020 at 15:10.. |
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19th January 2020, 07:52 | #290 |
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