DTC B2271: Ignition Hold Monitor Malfunction: Description
This DTC is stored when a malfunction in the IG1 drive circuit, IG2 drive circuit or IG hold circuit in the power management control ECU is detected.
HINT:
- When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode changes to on (IG).
- When the battery cable is disconnected and reconnected, the power source returns to the mode it was in before the battery cable was disconnected.
| DTC Code | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
|---|---|---|---|
| B2271 | Either condition is met (1-trip detection logic*):
|
|
Turn the engine switch on (IG). HINT: To turn the engine switch on (IG), carry the key and press the engine switch twice with the shift lever in P and the brake pedal released. |
- *: Only output while a malfunction is present and the engine switch is on (IG)
HINT:
- The IG1 and IG2 drive circuits activate the IG1 and IG2 relays.
- After the IG1 and IG2 drive circuits turn on, even if the power management control ECU operates incorrectly, the IG hold circuit maintains the engine switch on (IG) state.
VEHICLE CONDITION AND FAIL-SAFE FUNCTION WHEN MALFUNCTION DETECTED
| Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
|---|---|
| The power source mode is not allowed to change to on (IG) (the engine cannot be started). | The power source mode cannot be changed to on (IG). |