DTC B2271: Ignition Hold Monitor Malfunction: Procedure

WARNING: This page is about a different car, the 2012 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTC
1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
2. After all DTCs are cleared, check if the trouble occurs again 6 seconds after the engine switch is turned on (IG).
3. Check for DTCs again.
  OK
  
  DTC is not output.
NG → See step 2

OK → See step 3

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK) - BATTERY)

Disconnect the E50 and E51 ECU connectors.

Fig 1: Identifying E50 And E51 ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
E51-1 (AM1) - Body ground	Always	11 to 14 V
E50-6 (AM2) - Body ground	Always	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR, OR FUSE

OK → REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

USE SYMPTOM METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING