Dtc B2271 Ignition Hold Monitor Malfunction

Engine. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
2Az-Fe Starting. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK WHETHER DTC OUTPUT RECURS

INSPECT FUSE (AM2-2)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BATTERY AND BODY GROUND)

DTC B2271 Ignition Hold Monitor Malfunction


DESCRIPTION

This DTC is stored when the IG output circuits inside the main body ECU are open or shorted.

DTC Code
DTC Detection Condition
Trouble Area
B2271
IG1 relay actuation circuit or IG2 relay actuation circuit inside the main body ECU is abnormal.
  1. Main body ECU
  2. AM2-2 fuse
  3. Harness or connector

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Az-Fe Starting.Starting System (W/ Entry And Start System). Dtc B2271 Ignition Hold Monitor Malfunction


INSPECTION PROCEDURE

1.CHECK WHETHER DTC OUTPUT RECURS

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and turn the intelligent tester on.

  1. Clear the DTCs.

  1. Start the engine.

  1. Allow the engine to idle for 1 minute or more.

  1. Enter the following menus: Body / Main Body / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    B2271
    		A
    No DTC output
    		B


B
USE SIMULATION METHOD TO CHECK (RAV4_ACA30 RM000000UZ306OX.html)
A


2.INSPECT FUSE (AM2-2)

  1. Remove the AM2-2 fuse from the engine room No. 1 relay block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    AM2-2 fuse
    		Always
    		Below 1 Ω


NG
REPLACE FUSE
OK


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


    Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.2Az-Fe Starting.Starting System (W/ Entry And Start System). Dtc B2271 Ignition Hold Monitor Malfunction

  1. Disconnect the E18 and E19 main body ECU connectors.

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E19-1 (AM1) - Body ground
    		Always
    		11 to 14 V
    E18-6 (AM2) - Body ground
    		Always
    		11 to 14 V
    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E19-4 (GND2) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)