Dtc B1269 Theft Deterrent Ecu Communication Stop

Vehicle Interior. Yaris. Ncp93, 131
Theft Deterrent Keyless Entry. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

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

CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE)

DTC B1269 Theft Deterrent ECU Communication Stop


DESCRIPTION

DTC B1269 is output when the communication between the theft warning ECU (theft deterrent ECU) and the main body ECU stops for more than 10 seconds.

DTC Code.
DTC Detection Condition
Trouble Area
B1269
No communication from theft warning ECU for more than 10 seconds.
  1. Theft warning ECU assembly
  2. Wire harness and connector

WIRING DIAGRAM


Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan). Dtc B1269 Theft Deterrent Ecu Communication Stop


INSPECTION PROCEDURE

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


    Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan). Dtc B1269 Theft Deterrent Ecu Communication Stop

  1. Disconnect the D26 theft warning ECU and D33 main body ECU connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    D26-24 (BRK+) - D33-18 (SRX)
    		Below 1 Ω
    D26-25 (BRK-) - D33-19 (STX)
    		Below 1 Ω
    D26-24 (BRK+) or D33-18 (SRX) - Body ground
    		10 kΩ or higher
    D26-25 (BRK-) or D33-19 (STX) - Body ground
    		10 kΩ or higher
    D26-16 (E) - Body ground
    		Below 1 Ω

  1. Reconnect the theft warning ECU and main body ECU connectors.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE)
Yaris. Ncp93, 131.Theft Deterrent Keyless Entry.Engine Immobiliser System (For Sedan). Dtc B1269 Theft Deterrent Ecu Communication Stop

  1. Disconnect the D26 theft warning ECU connector.

  1. Check the voltage between the wire harness side connector and body ground.

    Standard voltage:
    Tester Connection
    		Specified Condition
    D26-11 (+B1) - Body ground
    		11 to 14 V
    D26-13 (+B2) - Body ground
    		11 to 14 V

  1. Reconnect the theft warning ECU connector.



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE THEFT WARNING ECU ASSEMBLY (YARIS_NCP93 RM0000033J4009X.html)