DTC B278A: Short to GND in Immobilizer System Power Source Circuit [10/2014 - ]: Description
When there is a short to GND in the power supply for the transponder key amplifier of the engine switch, the certification ECU (smart key ECU assembly) stores this DTC.
| DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B278A | A short to GND in the power supply of the transponder key amplifier of the engine switch (VC5 - VC5) (1 trip detection logic*). |
|
With the shift lever in P and the key held near the engine switch, an engine start operation is performed by pressing and holding the engine switch when the key battery is depleted. |
- *: Only output while a malfunction is present.
VEHICLE CONDITION AND FAIL-SAFE OPERATION WHEN MALFUNCTION DETECTED
| Vehicle Condition when Malfunction Detected | Fail-safe Operation when Malfunction Detected |
|---|---|
| Engine cannot be started when key battery is depleted by holding key near engine switch and pressing and holding engine switch with shift lever in P. | - |
RELATED DATA LIST AND ACTIVE TEST
| DTC Code | Data List and Active Test |
|---|---|
| B278A | - |