12-11-2023, 07:31 AM | #1 |
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F30 330E No 5v reference from ECU
Good Afternoon,
a little bit of a longshot and I don't usually ask for help with motors but i feel i may have hit a little bit of a dead end and would like any suggestions please? Background: BMW 330E 2017 F30 Starts but no response to accelerator, drive-train fault on dash, EML. Fault codes: 100211 Throttle valve adaption lower limit not learned 103002 Accelerator pedal module, pedal sensor 1 signal short to ground 103008 Accelerator pedal module, sensor 1 signal low 10890D Intake air temperature sensor signal short to ground 108B0B Charge-air temp sensor signal short circuit to ground 10C152 CYL head temp sensor and crankcase signal: temp too high or short to ground 121002 Charge pressure sensor signal short to ground 1b7202 Brake vacuum sensor Short to ground 1c3002 Oil pressure sensor signal: short to ground 1F1A95 DME Supply 1 sensors/actuators 5v: Voltage too low These are all the faults I have present. I understand that a sensor has potentially pulled down the 5v circuit, however i have disconnected all sensors on the Supply 5v 1 and i still get the same faults without change. the pins for the sensors were also disconnected from the harness at the DME and it made no difference, I suspected that meant the DME was at fault as I was still getting readings on live readings for the disconnected sensors which should be impossible. The DME was replaced with new from BMW, however the faults all remain. I have again disconnected each sensor to try identify what was causing the circuit to fail and unfortunatly came up with nothing. When disconnecting only plug A46*2B which supplys the Charge pressure sensor, Oil pressure sensor and Map/Temp sensor I do not have any 5V coming from the ECU on pin 53, 27 and 28. I would have thought to see a voltage at least if even it was not the correct one but instead get an earth which is why i assume all the fault codes are saying short to ground. Any suggestions would greatly be appreciated. I also am qualified to work on EV/Hybrid systems before anyone suggests i should not be touching this ![]() Cheers, |
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