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.

INSPECT BACK DOOR LOCK ASSEMBLY

Apply the battery voltage to the door lock motor and check the operation of the door lock motor.

CONNECTOR TERMINAL VOLTAGE REFERENCE CHART

Measurement Condition	Specified Condition
Battery position (+) --> Terminal 1 Battery negative (-) --> Terminal 2	Lock
Battery position (+) --> Terminal 2 Battery negative (-) --> Terminal 1	Unlock

Fig 1: Inspecting Back Door Lock Assembly

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE BACK DOOR LOCK ASSEMBLY

OK: GO TO NEXT STEP

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - BACK DOOR LOCK ASSEMBLY)

Disconnect the 4A main body ECU connector.
Disconnect the N3 door lock connector.

Measure the resistance.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection	Specified Condition
4A-3 (ACT+) - N3-1	Below 1 Ω
4A-4 (ACT-) - N3-2	Below 1 Ω

Reconnect the main body ECU connector.
Reconnect the door lock connector.

Fig 2: Identifying 4A Main Body ECU Connector And N3 Door Lock Connector

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE MAIN BODY ECU