Power Door Lock Control System (For Hatchback) Only Back Door Cannot Be Opened

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING TECHSTREAM (DOOR LOCK STATUS)

PERFORM ACTIVE TEST USING TECHSTREAM

READ VALUE USING TECHSTREAM

INSPECT BACK DOOR LOCK ASSEMBLY

CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

INSPECT BACK DOOR OPENER SWITCH ASSEMBLY

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Unlock all doors.
   

2. Connect the Techstream to the DLC3.
   

3. Turn the ignition switch to ON.
   

4. Turn the Techstream on.
   

5. Enter the following menus: Body Electrical / Main Body / Data List.
   

6. According to the display on the Techstream, read the Data List.
   

OK:

The Techstream indicates Permit according to the door lock operation shown in the table.

1. Connect the Techstream to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the Techstream on.
   

4. Enter the following menus: Body Electrical / Main Body / Active Test.
   

5. According to the display on the Techstream, perform the Active Test.
   
   

   Main Body

   Tester Display	Test Part	Control Range	Diagnostic Note
   Trunk and Back-Door Open	Back door lock motor	OFF / ON	-

   OK:

   The back door lock assembly unlatches when ON is selected.
   

1. Connect the Techstream to the DLC3.
   

2. Turn the ignition switch to ON.
   

3. Turn the Techstream on.
   

4. Enter the following menus: Body Electrical / Main Body / Data List.
   

5. According to the display on the Techstream, read the Data List.
   
   

   Main Body

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Back Door Open Handle SW	Back door opener switch signal / OFF or ON	OFF: Back door opener switch not pushed ON: Back door opener switch pushed	-

   OK:

   The Techstream indicates ON or OFF according to the switch operation shown in the table.
   

1. Inspect the back door lock assembly (YARIS_NCP93 RM000001Y80035X.html).
   

1. Disconnect the T5 back door lock assembly connector.
   

2. Disconnect the 3D instrument panel junction block assembly connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   T5-1 (ACT+) - 3D-9	Always	Below 1 Ω
   T5-2 (ACT-) - Body ground	Always	Below 1 Ω
   T5-1 (ACT+) - Body ground	Always	10 kΩ or higher

1. Remove the instrument panel junction block assembly (YARIS_NCP93 RM000003TOE00CX.html).
   

2. Remove the main body ECU (YARIS_NCP93 RM000003TOE00CX.html).
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   3E-1 - 3D-9	Always	10 kΩ or higher
   3E-1 - MB-6 (TR+)	Always	Below 1 Ω

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

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   3D-9 - Body ground	Battery positive (+) → 3E-1 Battery negative (-) → MB-6	11 to 14 V

1. Inspect the back door opener switch assembly (YARIS_NCP93 RM000002QPK01LX.html).
   

1. Disconnect the D143 main body ECU connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   D143-23 (BDSU) - T6-3 (B)	Always	Below 1 Ω
   T6-2 (L) - Body ground	Always	Below 1 Ω
   T6-3 (B) - Body ground	Always	10 kΩ or higher