Dtc B2272 Ignition 1 Monitor Malfunction

Vehicle Interior. Corolla. Zre142 Aze141
Theft Deterrent Keyless Entry. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM

CHECK FOR DTC

INSPECT RELAY (IG1 RELAY)

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

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

DTC B2272 Ignition 1 Monitor Malfunction


DESCRIPTION

This DTC is output when there is a problem in the IG1D output circuit, which is from the inside of the main body ECU (instrument panel junction block) to the IG1 relay.
HINT:
When the main body ECU (instrument panel junction block) is replaced with a new one and the cable from 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 (instrument panel junction block) is replaced, perform the registration procedures for the engine immobiliser system (COROLLA_ZRE142 RM000000QYF05AX.html).

DTC No.
DTC Detection Condition
Trouble Area
B2272
IG1 relay actuation circuit inside main body ECU (instrument panel junction block) or other related circuit is malfunctioning
  1. Main body ECU (instrument panel junction block)
  2. IG1 relay
  3. Wire harness or connector

WIRING DIAGRAM


Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2272 Ignition 1 Monitor Malfunction


INSPECTION PROCEDURE

1.READ VALUE USING TECHSTREAM

  1. Connect the Techstream to the DLC3.

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

  1. Select the item below in the Data List, and read the display on the Techstream.

    HINT:
    When using the Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the Techstream and vehicle starts.

    Main Body
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    IG1 Relay Monitor (Outside)
    		Status of IG1 relay monitor (outer) / ON or OFF
    		ON: Engine switch on (IG) (IG1 relay is ON)
    OFF: Engine switch off (IG1 relay is OFF)
    		-
    OK:
    "ON" (engine switch on (IG)) appears on the screen.


NG
Go to step 3
OK


2.CHECK FOR DTC

  1. Clear the DTC (COROLLA_ZRE142 RM000000YEH0CGX.html).

  1. Turn the engine switch on (IG).

  1. After 10 seconds have elapsed, check if the trouble occurs again.

    OK:
    DTC B2272 is not output.


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

USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000UZ108OX.html)

3.INSPECT RELAY (IG1 RELAY)


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2272 Ignition 1 Monitor Malfunction

  1. Remove the IG1 relay from the instrument panel junction block.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    3 - 5
    		When battery voltage is not applied to terminals 1 and 2
    		10 kΩ or higher
    3 - 5
    		When battery voltage is applied to terminals 1 and 2
    		Below 1 Ω


NG
REPLACE IG1 RELAY
OK


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


  1. Disconnect the 2F junction block connector.


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2272 Ignition 1 Monitor Malfunction

  1. Disconnect the E51 ECU connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2F-3 - E51-6 (IG1D)
    		Always
    		Below 1 Ω
    E51-6 (IG1D) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - MAIN BODY ECU)
OK


5.CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BATTERY AND BODY GROUND)


  1. Disconnect the 2E and 2G junction block connectors.


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B2272 Ignition 1 Monitor Malfunction

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    2E-17 - Body ground
    		Always
    		Below 1 Ω

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    2G-1 - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK - BATTERY AND BODY GROUND)
OK

REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)