Power Door Lock Control System: Pre-Check

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSIS SYSTEM

Inspect the DLC3.

HINT:

The vehicle's ECM uses ISO 9141-2 for communication. The terminal arrangement of DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.

Fig 1: Identifying DLC3 Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DLC3 CONNECTOR - SPECIFIED CONDITION

Terminal No.	Condition	Specified Condition
7 (Bus + line) - 5 (Signal ground)	During communication	Pulse generation
4 (Chassis ground) - Body ground	Constant	Below 1 Ω
5 (Signal ground) - Body ground	Constant	Below 1 Ω
16 (B+) - Body ground	Constant	9 to 14 V

HINT:

If the screen displays UNABLE TO CONNECT TO VEHICLE after you have connected the cable of the hand-held tester to the DLC3, turned the ignition switch ON and used the hand-held tester, there is a problem on the vehicle side or tester side.

If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
If communication is still impossible when the tester is connected to another vehicle, the problem is probably in the tester itself, so consult the Service Department listed in the tester's manual.

CHECK DTC (USING HAND-HELD TESTER)
1. Checking DTCs.
  1. Connect the hand-held tester to the DLC3.
    
    Fig 2: Connecting Hand-Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Turn the ignition switch ON.
  3. Read DTCs by following the prompts on the tester screen.
HINT:

Refer to the hand-held tester operator's manual for further details.
CLEAR DTC (USING HAND-HELD TESTER)
1. Clearing the DTCs from memory.
  1. Connect the hand-held tester to the DLC3.
  2. Turn the ignition switch ON.
  3. Erase the DTCs following the prompts on the tester screen.
HINT:

Refer to the hand-held tester operator's manual for further details.
DATA LIST
HINT:

Using the DATA LIST displayed on the hand-held tester, you can read the value of the switch, sensor, actuator, etc. without parts removal. Reading the DATA LIST as the first step of troubleshooting is one way to shorten the labor time.
1. Connect the hand-held tester to the DLC3.
2. Turn the ignition switch ON.
3. Read the DATA LIST according to the display on the tester.
  Standard (Multiplex network body ECU):
Fig 3: Standard (Multiplex Network Body ECU) Data List Table (1 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Standard (Multiplex Network Body ECU) Data List Table (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

ACTIVE TEST

HINT:

Performing the ACTIVE TEST using the hand-held tester allows you to operate the relay, VSV, actuator, etc. without parts removal. Performing the ACTIVE TEST as the first step of troubleshooting is one way to shorten the labor time. It is possible to display the DATA LIST during the ACTIVE TEST.

Connect the hand-held tester to the DLC3.
Turn the ignition switch ON.
Perform the ACTIVE TEST according to the display on the tester.
Standard (Multiplex network body ECU):

STANDARD (MULTIPLEX NETWORK BODY ECU) ACTIVE TEST SPECIFICATION

Item	Test Details	Diagnostic Note
TRUNK/BDOR OPEN	Open back door OFF/ON	-
DOOR LOCK	Operate door lock motor for all doors OFF/LOCK/UNLOCK	-

BACK DOOR LOCK
1. When the battery is reconnected:
  The back door is locked and therefore cannot be opened. Therefore, it is necessary to unlock the back door using the door control switch or transmitter switch.