BMW DTC P0694 – Fan 2 Control Circuit High
DTC P0694 meaning on BMW
The Diagnostic Trouble Code (DTC) P0694 for BMW indicates a fault in the Fan 2 Control Circuit, specifically a high voltage condition. This code is triggered when the Engine Control Module (ECM) detects that the voltage signal from the Fan 2 control circuit is higher than the specified range.
BMW DTC P0694 symptoms
Symptoms associated with DTC P0694 on a BMW may include:
- Engine overheating
- Malfunctioning cooling fan
- Check Engine Light (CEL) illuminated on the dashboard
BMW DTC P0694 causes
The common causes of DTC P0694 on a BMW are:
- Defective cooling fan relay
- Short circuit or open circuit in the cooling fan wiring
- Faulty Engine Control Module (ECM)
BMW DTC P0694 seriousness
Ignoring DTC P0694 on a BMW can lead to serious consequences such as engine overheating, which can result in engine damage or failure. It is important to address this issue promptly to prevent further damage to the vehicle.
How to diagnose DTC P0694 on BMW
To diagnose DTC P0694 on a BMW, you can follow these steps:
- Use a diagnostic scanner to retrieve the fault codes stored in the ECM.
- Inspect the cooling fan relay and wiring for any visible damage or corrosion.
- Check the voltage signal from the Fan 2 control circuit using a multimeter.
- If necessary, perform a continuity test on the wiring to identify any open or short circuits.
How to fix DTC P0694 on BMW
To fix DTC P0694 on a BMW, you can try the following solutions:
- Replace the cooling fan relay if it is found to be defective.
- Repair any damaged or corroded wiring in the cooling fan circuit.
- If the ECM is faulty, consider replacing it with a new one.
How to erase DTC P0694 on BMW
To erase DTC P0694 on a BMW, you can use a diagnostic scanner to clear the fault codes stored in the ECM. After fixing the underlying issue that triggered the code, you can then reset the ECM to remove the DTC P0694 from the system.
Recommended tools & DTC Scanners for BMW
Best Diagnostic App for modern BMWs: BimmerLink
Recommended Bluetooth adapter for Bimmerlink: OBDLink CX
Cable adapter for Bimmerlink: Enet Cable USB Type C
For older BMWs we recommend: Autel AutoLink AL319 (2024 version)
Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter
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