Experiencing radiator fan problems in your 2009 Dodge Journey can be concerning. If your fan isn’t engaging properly, especially when the AC is on, it could lead to engine overheating. While the original discussion points to relay issues and scan tool diagnostics via the OBD II port, let’s consider another crucial component in your vehicle’s electrical system: fuses, specifically the 2009 Dodge Journey Obd2 Fuse and those related to the radiator fan.
The OBD2 port is essential for diagnostics, and it relies on a fuse to function. While there isn’t typically a direct “OBD2 fuse” that solely controls the radiator fan, fuses protect various circuits, including those for the PCM (Powertrain Control Module) and TIPM (Totally Integrated Power Module). These modules are integral to managing the radiator fan operation. The PCM, based on engine and transmission temperatures, signals the TIPM to activate the fan relays – low speed then high speed as needed.
If you’re facing fan issues, checking the fuses related to the PCM, TIPM, and radiator fan relays is a fundamental step, even before using a scan tool. Consulting your 2009 Dodge Journey’s fuse box diagram will pinpoint the relevant fuses. A blown fuse in one of these circuits could disrupt the signal path to the fan relays, preventing proper fan operation.
Using a bidirectional scan tool via the OBD2 port, as mentioned, is an effective way to test the fan circuits. However, ensure your OBD2 port is functioning correctly first, and a blown 2009 Dodge Journey OBD2 fuse (or a fuse affecting its operation) could hinder this. If the OBD2 port is dead, check its fuse.
Before assuming complex relay or module failures, a simple fuse check can save time and effort. While diagnosing without a scan tool, consider the ambient temperature and driving conditions when overheating occurs. Does it happen in slow city driving or at highway speeds? Observe your temperature gauge. If overheating is suspected, verifying fuse integrity is a logical starting point in your troubleshooting process for your 2009 Dodge Journey’s radiator fan system.
