DTC U0164-68; Communication Error With Climate Control Unit: Notes
WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSE
| Description |
Communication error with climate control unit |
| Detection condition |
- Front body control module (FBCM) could not receive signals from the climate control unit for 5 s or more with the ignition switched ON (engine off or on).
|
| Fail-safe function |
Not applicable |
| Possible cause |
- Climate control unit connector or terminal malfunction
- Front body control module (FBCM) connector or terminal malfunction
- Short to ground in wiring harness between climate control unit terminal B and front body control module (FBCM) terminal 2J
- Short to power supply in wiring harness between climate control unit terminal B and front body control module (FBCM) terminal 2J
- Open circuit in wiring harness between climate control unit terminal B and front body control module (FBCM) terminal 2J
- Climate control unit malfunction
- Front body control module (FBCM) malfunction
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