DTC B1C84-14; Rear Window Defogger Relay Circuit Malfunction: 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 |
Rear window defogger relay circuit malfunction |
| Detection condition |
- Front body control module (FBCM) detects an open circuit or short to ground in the rear window defogger relay circuit with the ignition switched ON (engine off or on).
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| Fail-safe function |
Not applicable |
| Possible cause |
- Rear window defogger relay malfunction
- Front body control module (FBCM) connector or terminal malfunction
- Short to ground in wiring harness between rear window defogger relay terminal E and front body control module (FBCM) terminal 1P
- Open circuit in wiring harness between rear window defogger relay terminal E and front body control module (FBCM) terminal 1P
- Front body control module (FBCM) malfunction
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