Possible Causes
WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
Possible causes are:
- Fan control module malfunction
- Connector or terminal malfunction
- Open circuit in Red/Black wire between fan control module 3-pin harness connector terminal "1B" and PCM 104-pin harness connector terminal No. 44
- Short to power circuit in Red/Black wire between fan control module 3-pin harness connector terminal "1B" and PCM 104-pin harness connector terminal No. 44
- Short to ground circuit in Red/Black wire between fan control module 3-pin harness connector terminal "1B" and PCM 104-pin harness connector terminal No. 44
- PCM malfunction