[xjackhunter]

I posted about this about a week ago but got no replies so I figure I'll try again lol.
I replaced the valve cover on my e93 335i. After buttoning everything up, I turned the car on and noticed that the radiator fan was on full blast. I have no idea what could be causing this, and any input would be appreciated. Thankfully though, I haven't needed the car lately due to COVID-19.
Thanks,
Jack.

[mainbearing]

Maybe a connector was left disconnected?

[gbalthrop]

Originally Posted by xjackhunter

I posted about this about a week ago but got no replies so I figure I'll try again lol. I replaced the valve cover on my e93 335i. After buttoning everything up, I turned the car on and noticed that the radiator fan was on full blast...

"Fault Codes After Valve Cover Replacement (N54)" was the Caption of your thread on 3/22, BUT NO FAULT CODES were provided.

Perhaps others on this Forum have the ability to "divine" fault codes from hundreds/thousands of miles away, but I don't.

If you have, or can borrow, a scan tool, please read fault codes and post code(s) & definition(s) provided by Tool. Advance Auto/Autozone can read free if still open. If Scan Tool has ability to display Freeze Frame Data that shows basic engine Parameters at time Fault Code saved in DME Memory, please provide FF Data as well.

E-Fan or Electric Radiator Fan control by the DME is based primarily on ECTS (Engine Coolant Temp Sensor) Signal to the DME, so the first thing to check is to see if that Sensor Connector is properly installed, and its wiring is intact. Here is the Bentley description of the Inputs to the DME for E-fan Control, 170-3, p.356 of pdf:

Electric fan activation is based on the following inputs to the ECM:
• Radiator outlet temperature [ECTS Signal if NO ROTS on Lower Rad Hose]
• Calculated catalytic converter temperature
• Vehicle speed
• Battery voltage
• Calculated refrigerant pressure

Any cheap Scan Tool can read ECTS Signal as received by the DME (Engine Temp) as a Parameter. INPA can read Refrigerant Pressure signal from the Refrigerant Pressure Sensor, located on Right Side of Engine near the Washer Filler Tube. Make sure that Connector is also connected properly. INPA can also Activate the E-Fan at different speeds and show you its ACTUAL speed, to test the Fan Electronics and DME PWM Signal to Fan Unit.

Test Fan Speed, BOTH with A/C & Compressor ON/OFF.

Please provide some data. Telepathy ain't cuttin' it.

George

[xjackhunter]

Originally Posted by gbalthrop

"Fault Codes After Valve Cover Replacement (N54)" was the Caption of your thread on 3/22, BUT NO FAULT CODES were provided.

Perhaps others on this Forum have the ability to "divine" fault codes from hundreds/thousands of miles away, but I don't.

If you have, or can borrow, a scan tool, please read fault codes and post code(s) & definition(s) provided by Tool. Advance Auto/Autozone can read free if still open. If Scan Tool has ability to display Freeze Frame Data that shows basic engine Parameters at time Fault Code saved in DME Memory, please provide FF Data as well.

E-Fan or Electric Radiator Fan control by the DME is based primarily on ECTS (Engine Coolant Temp Sensor) Signal to the DME, so the first thing to check is to see if that Sensor Connector is properly installed, and its wiring is intact. Here is the Bentley description of the Inputs to the DME for E-fan Control, 170-3, p.356 of pdf:

Electric fan activation is based on the following inputs to the ECM:
• Radiator outlet temperature [ECTS Signal if NO ROTS on Lower Rad Hose]
• Calculated catalytic converter temperature
• Vehicle speed
• Battery voltage
• Calculated refrigerant pressure

Any cheap Scan Tool can read ECTS Signal as received by the DME (Engine Temp) as a Parameter. INPA can read Refrigerant Pressure signal from the Refrigerant Pressure Sensor, located on Right Side of Engine near the Washer Filler Tube. Make sure that Connector is also connected properly. INPA can also Activate the E-Fan at different speeds and show you its ACTUAL speed, to test the Fan Electronics and DME PWM Signal to Fan Unit.

Test Fan Speed, BOTH with A/C & Compressor ON/OFF.

Please provide some data. Telepathy ain't cuttin' it.

George

There was no code for the rad fan, only for the active steering. This thread, was specifically about the rad fan. Shall I pull an imaginary code out of my ass? If your plan was to be a dick, you shouldn't have even replied lol.