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).
DTC No. |
DTC Detection Condition |
Trouble Area |
B2222 |
Power back door does not operate |
- Wire harness
- Power back door drive unit
- Power back door ECU
|
WIRING DIAGRAM

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

- Disconnect the P12 unit and P13 ECU connectors.
- Check the resistance between the wire harness side
connectors.
Resistance (Check for open circuit)

2 INSPECT POWER BACK DOOR DRIVE UNIT

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

- Check the resistance of the clutch terminals.
Resistance

- Reinstall the unit with the connector connected.

- Check the pulse of the pulse sensor.
- 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
If a malfunction code is displayed during the DTC check,
check the circuit listed for that code in the table below.
(Proceed to the page given for that circuit.)
POWER BACK DOOR SYSTEM
...
DESCRIPTION
The power back door operates only when the power back door main
switch is ON. The power back
door ECU controls the power back door by activating the back door motor
(built into ...
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INSPECTION
1. INSPECT SLIDE DOOR HALF OPEN STOPPER CONTROL ASSEMBLY
Inspect the resistance of the switch.
Resistance
If the result is not as specified, replace the control
sub-assembly. ...