DTC B1087-87: Communication Error With Commander Switch: Notes
WARNING: This page is about a different car, the 2018 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1087:87 (CONNECTIVITY MASTER UNIT) DETECTION CONDITION AND POSSIBLE CAUSE
| Description |
Communication Error With Commander Switch |
| Detection condition |
- The connectivity master unit (CMU) cannot receive a LIN signal from the commander switch for 5 s or more with the ignition switched ACC or ON (engine off or on).
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| Fail-safe |
Not applicable |
| Possible cause |
- Commander switch connector or terminal malfunction
- Connectivity master unit (CMU) connector or terminal malfunction
- Short to ground in wiring harness between connectivity master unit (CMU) terminal 2K and commander switch terminal E
- Short to power supply in wiring harness between connectivity master unit (CMU) terminal 2K and commander switch terminal E
- Open circuit in wiring harness between connectivity master unit (CMU) terminal 2K and commander switch terminal E
- Commander switch malfunction
- Connectivity master unit (CMU) malfunction
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