Circuit description
WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
When the collation ECM (smart key ECM ASSY) detects the input signal that indicates that the ID code box is installed on the vehicle even when ID code box is not registered, the collation ECM (smart key ECM ASSY) outputs this DTC.
| Diagnostic codes | Detecting conditions | Faulty part | Diagnostic code output check operation |
|---|---|---|---|
| B278D | Even without installation of the wire harness that judges whether the ID code box is installed on the vehicle or not, the collation ECM (smart key ECM ASSY) receives the LIN signal from the ID code box. | There are not the communication failure without ID code box. | Always |
| *: Output only when a failure is noted. | |||
VEHICLE STATUS AND FAILSAFE UPON FAILURE DETECTION
| Vehicle status when a problem is detected | Failsafe function when a problem is detected |
|---|---|
| Key registration is prohibited. | - |
CURRENT DATA DISPLAY & SAVE / SYSTEM OPERATION CHECK MODE
| Diagnostic codes | [Current Data Display & Save]/[System Operation Check Mode] |
|---|---|
| B278D | - |