Toyota Sienna Service Manual: PBD Pulse Sensor Malfunction

DTC B2222 PBD Pulse Sensor Malfunction

DESCRIPTION

• A pulse sensor is built into the back door for a jam and foreign object detection and for back door position detection. The jam and foreign object detection feature of the pulse sensor monitors the operating speed of the back door while the power back door is in operation. The back door position detection feature of the pulse sensor monitors the back door location. If the back door position detection feature outputs a pulse signal that is out of the normal range, the power back door ECU will set DTC B2222.
• If DTC B2222 sets, the power back door system will be turned off. Thus, the back door can be moved freely and will be switched to manual operation mode (not electrically controlled).
• In order to restore the power back door system to normal operation mode, first solve the problem indicated by DTC B2222 and then manually close the back door fully (reset operation).

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK WIRE HARNESS (POWER BACK DOOR DRIVE UNIT - POWER BACK DOOR ECU)

1. Disconnect the P12 unit and P13 ECU connectors.
2. Check the resistance between the wire harness side connectors.

Resistance (Check for open circuit)

2 INSPECT POWER BACK DOOR DRIVE UNIT

1. Remove the unit.
2. Connect the battery positive (+) lead to terminal 3 and battery negative (-) terminal lead to terminal 9.
3. Apply battery voltage to the terminals and check the motor operation.

OK

4. Check the resistance of the clutch terminals.

Resistance

5. Reinstall the unit with the connector connected.

6. Check the pulse of the pulse sensor.

1. Using an oscilloscope, check the pulse generated when the door is manually opened and closed.

Reference

HINT: A cycle of the pulse changes between approx. 10 to 20 msec. according to the speeds that the slide door is moving.

NOTICE: When disconnecting the drive unit, initialize the power back door system

REPLACE POWER BACK DOOR ECU