Dtc B1269 Theft Deterrent Ecu Communication Stop

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE)

CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU ASSEMBLY - MAIN BODY ECU)

CONFIRM DTC

REPLACE THEFT WARNING ECU ASSEMBLY

CONFIRM DTC

DTC B1269 Theft Deterrent ECU Communication Stop


DESCRIPTION

DTC B1269 is stored when the communication between the theft warning ECU assembly and the main body ECU stops for more than 10 seconds.

DTC No.
DTC Detection Condition
Trouble Area
B1269
No communication from theft warning ECU assembly for more than 10 seconds.
  1. Wire harness and connector
  2. Theft warning ECU assembly
  3. Main body ECU (instrument panel junction block)

WIRING DIAGRAM


Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B1269 Theft Deterrent Ecu Communication Stop


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
1.CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE)

  1. Disconnect the E110 theft warning ECU assembly connector.



    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B1269 Theft Deterrent Ecu Communication Stop

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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    E110-11 (+B1) - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (THEFT WARNING ECU ASSEMBLY - MAIN BODY ECU)


  1. Disconnect the E61 main body ECU connector.


    Corolla. Zre142 Aze141.Theft Deterrent Keyless Entry.Smart Key System (For Entry Function). Dtc B1269 Theft Deterrent Ecu Communication Stop

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E110-24 (BRK+) - E61-18 (SRX)
    		Always
    		Below 1 Ω
    E110-25 (BRK-) - E61-19 (STX)
    		Always
    		Below 1 Ω
    E110-24 (BRK+) - Body ground
    		Always
    		10 kΩ or higher
    E110-25 (BRK-) - Body ground
    		Always
    		10 kΩ or higher
    E110-16 (E) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CONFIRM DTC

  1. Clear the DTC (COROLLA_ZRE142 RM000001NN603AX.html).

  1. Check if the same DTC is detected.

    HINT:
    Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.
    Result:
    Result
    		Proceed to
    DTC is output
    		A
    DTC is not output
    		B


B
USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000UZ108OX.html)
A


4.REPLACE THEFT WARNING ECU ASSEMBLY

  1. Replace the theft warning ECU assembly (COROLLA_ZRE142 RM00000342K00IX.html)


NEXT


5.CONFIRM DTC

  1. Clear the DTC (COROLLA_ZRE142 RM000001NN603AX.html).

  1. Check if the same DTC is detected.

    HINT:
    Reinstall the sensors, connectors, etc. and restore the previous vehicle conditions before rechecking for DTCs.
    Result:
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output
    		B


B
REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)
A

END