Circuit description

This DTC is output when a problem is detected in the IG1 drive circuit, the IG2 drive circuit, or the IG hold circuit in the collation ECM (smart key ECM ASSY).

NOTE: If you remove and then reconnect the battery cable, the power returns to the mode it was before you removed the cable.

DTC No.

DTC detection status

Faulty part

DTC Output Confirmation Operation

B2271

Meet any of the conditions (1-trip detection logic⁽¹⁾):

There is a problem in the IG1 or IG2 drive of the collation ECM (smart key ECM ASSY).
There is a problem in the 1G hold circuit of the collation ECM (smart key ECM ASSY).

AM2 No. 2 fuse
Collation ECM (smart key ECM ASSY)
Wiring harness or connector

Turn the ignition switch to ON.

NOTE: To turn the engine switch to on (IG), hold the key, move the shift lever into P or N ⁽²⁾, remove your foot from the brake pedal ⁽²⁾ or the clutch ⁽³⁾, and press the engine switch 2 times.

⁽¹⁾	The code is output only when the problem is found and the engine switch is on (IG).

⁽²⁾	With automatic transmission

⁽³⁾	With manual transmission

NOTE:

The IG1 and IG2 drive circuits drive the IG1 and IG2 relays.
Even if the collation ECM (smart key ECM ASSY) performs an inaccurate operation, if the IG1 drive circuit and the IG2 drive circuit are on, the IG hold circuit will hold the engine switch in an on (IG) status.

VEHICLE STATUS AND FAIL-SAFE FUNCTION DESCRIPTION

Vehicle status when a problem is detected	Fail-safe function when a problem is detected
The power mode cannot be changed to on (IG). (the engine does not start)	The power mode does not change to on (IG).

DATA MONITOR AND ACTIVE TEST

DTC No.	[Data monitor] item	[Active Test] item
B2271	Power supply [IG1 relay monitor (outside)] [IG2 relay monitor (outside)] Engine [Ignition]	-