Dtc B2271 Ignition Hold Monitor Malfunction. Corolla Auris

Двигатель. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
Система Запуска 2Zr-Fe. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC OUTPUT

INSPECT FUSE (AM2 NO. 2)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY)

DTC B2271 Ignition Hold Monitor Malfunction


DESCRIPTION

This DTC is output when a problem such as an open in the AM2 NO. 2 fuse, an open or short in the wire harness between the fuse and main body ECU, a short in the IG output circuit inside the main body ECU, a short between the main body ECU and relay, and a short in the relay is detected.
УКАЗАНИЕ:
When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
After the main body ECU is replaced, perform the registration procedures for the engine immobiliser system.

DTC No.
DTC Detection Condition
Trouble Area
B2271
Hold circuit, IG1 relay actuation circuit or IG2 relay actuation circuit inside main body ECU is open or shorted
  1. AM2 NO. 2 fuse
  2. Main body ECU
  3. Wire harness or connector

WIRING DIAGRAM


COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Запуска 2Zr-Fe.Система Запуска. Dtc B2271 Ignition Hold Monitor Malfunction


INSPECTION PROCEDURE

1.CHECK DTC OUTPUT

  1. Delete the DTCs (See page Нажмите здесь).

    УКАЗАНИЕ:
    After all DTCs are cleared, check if the trouble occurs again 6 seconds after the engine switch is turned on (IG).

  1. Check for DTCs again.

    OK:
    No DTC is output.


NG
Перейдите к шагу 2
OK

CHECK INTERMITTENT PROBLEMS

2.INSPECT FUSE (AM2 NO. 2)

  1. Remove the AM2 NO. 2 fuse from the engine room junction block.

  1. Measure the resistance of the fuse.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


3.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Запуска 2Zr-Fe.Система Запуска. Dtc B2271 Ignition Hold Monitor Malfunction

  1. Disconnect the E50 and E51 ECU connectors.

  1. 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
OK

REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)