Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch ON.
3. Turn the tester on.
4. Select the item below in the Data List and read the display on tester.

   Theft Warning ECU 

   THEFT WARNING ECU TABLE
   
   

   Item	Test Details
   Back Door Lock	Back door unlock detection switch signal OFF

   OK: When the back door is locked, "ON" appears on the screen. 

   Theft Warning ECU 

   THEFT WARNING ECU TABLE
   
   

   Item	Test Details
   Back Door Unlock	Back door unlock detection switch signal ON

   OK: When the back door is unlocked, "ON" appears on the screen. 

   HINT:

   The theft warning ECU detects the back door lock condition using signals from the back door unlock detection switch. The condition can be displayed as Back Door Lock or Back Door Unlock on the Techstream by the theft warning ECU.

NG: Go to step   2 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

1. Disconnect the N4 unlock detection switch connector.
2. Measure the resistance.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   1-2	The back door is locked	10 kΩ or higher
   1-2	The back door is unlocked	Below 1 Ω

3. Reconnect the unlock detection switch connector.
Fig 1: Identifying N4 Unlock Detection Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE BACK DOOR LOCK ACTUATOR ASSEMBLY 

OK: GO TO NEXT STEP 

1. Disconnect the D26 theft warning ECU and the N4 unlock detection switch connectors.
2. Measure the resistance.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   D26-6 (LSR) - N4-2	Below 1 Ω
   N4-2 - Body ground	10 kΩ or higher

3. Reconnect the theft warning ECU and the unlock detection switch connectors.
Fig 2: Checking Harness & Connector (Theft Warning ECU Assembly - Back Door Lock Actuator Assy)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Disconnect the N4 unlock detection switch connector.
2. Measure the resistance.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   N4-1 - Body ground	Below 1 Ω

3. Reconnect the unlock detection switch connector.
Fig 3: Checking Harness & Connector (Back Door Lock Actuator Assembly Body Ground)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE THEFT WARNING ECU ASSEMBLY