Inspection Procedure

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

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

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

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

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

Reconnect the theft warning ECU and main body ECU connectors.

Fig 1: Checking ECU Harness & Connector (Theft Warning ECU Assembly - Main Body ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (BATTERY VOLTAGE)

Disconnect the D26 theft warning ECU connector.

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

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION

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

Reconnect the theft warning ECU connector.

Fig 2: Checking Harness & Connector (Battery Voltage)

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: REPLACE THEFT WARNING ECU ASSEMBLY