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Section 485 (Back Door Power Window Control System - Diagnostics): Pre-Check

WARNING: This page is about a different car, the 2004 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK WINDOW LOCK SWITCH 
    1. Check that operation of the door glasses except for the driver side door glass, the back door glass and the roof glass is disabled when the window lock switch of the power window master switch is pressed.
    2. Check that the door glasses, the back door glass and the roof glass can be operated when the window lock switch is pressed again.
    Fig 1: Checking Window Lock Switch
    G02835341Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. CHECK MANUAL UP/DOWN FUNCTION 
    1. Check that the back door glass can be operated using the back power window switch as follows.
    Fig 2: Standard: Manual Up/Down Function
    G02835342Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. CHECK AUTO UP/DOWN FUNCTION 
    1. Check that the back door glass can be operated using the back power window switch as follows.
    Fig 3: Standard: Auto Up/Down Function
    G02835343Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. CHECK MANUAL UP/DOWN FUNCTION VIA BACK DOOR LOCK KEY CYLINDER 
    1. Check that the back door glass operates when the back door lock key cylinder is operated using the key as follows.
    Fig 4: Standard: Manual Up/Down Function Via Back Door Lock Key Cylinder
    G02835344Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. CHECK MANUAL DOWN FUNCTION VIA TRANSMITTER 
    1. Check that the back door glass keeps opening while the back door power window switch on the transmitter is pressed with the rear wiper in the retract position.
  6. CHECK POWER WINDOW OPERATION FUNCTION AFTER IGNITION OFF 
    1. Under both of the following conditions, check that the door glasses, the back door glass and the roof glass can be operated even after the ignition switch is turned OFF:
      • Within 45 seconds after the ignition switch is turned OFF
      • The driver side door is closed
  7. CHECK JAM PROTECTION FUNCTION 

    HINT:

    The jam protection function prevents any part of your body from getting caught by accident between the door frame and the door glass during power window operation.

    1. Check that the door glass goes down by 50 mm (2.0 in.) right when something gets caught between the door frame and door glass during power window operation. However, when the opening amount between the vehicle body and the door glass is less than 200 mm (7.9 in.), the door glass keeps going down until the opening amount reaches 200 mm (7.9 in.) and stops there.

    Operative condition: 

    • AUTO UP via the back door power window switch
    • AUTO/MANUAL UP operation after ignition OFF
    • MANUAL UP via the back door lock key cylinder
  8. CHECK FAIL-SAFE FUNCTION 
    1. If the pulse sensor in the back door power window motor malfunctions (DTC B2221 is output), the power window functions will be restricted:
      • The AUTO UP/DOWN function is disabled.
      • The MANUAL DOWN function via the transmitter is disabled.
      • The MANUAL UP/DOWN function via the back door power window switch can be performed (the ignition switch ON).
      • The MANUAL UP/DOWN function via the back door lock key cylinder can be performed (the ignition switch ON).
  9. CHECK DATA LIST WITH HAND-HELD TESTER 
    1. According to the data list displayed by the hand-held tester, you can read the value of the switch, sensor, actuator without parts removal. Reading the data list as a first step of troubleshooting is one of the method to shorten the labor time.
    BACK DOOR ECU DATA LIST

    Measurement Item Label Parameter
    Rear wiper retract switch WIPER RTRCTSW ON/OFF
    Rear door lock key switch at LOCK position KEY SW (UNLK) ON/OFF
    Rear door lock key switch at UNLOCK position KEY SW (LOCK) ON/OFF
    Back door glass position P/W POSITION CLOSE/OPEN
    Back door glass position (Fully closed - 1/4) GLASS POS - 1/4 CAUTION/OK(1)
    Back door glass position (1/4- 2/4) GLASS POS - 2/4 CAUTION/OK(1)
    Back door glass position (2/4 - 3/4) GLASS POS - 3/4 CAUTION/OK(1)
    Back door glass position (3/4 - Fully opened) GLASS POS - OPEN CAUTION/OK(1)
    (1) If CAUTION is displayed even when no resistance is applied in each range, there must be a caught somewhere in that range.
  10. USING HAND-HELD TESTER, CHECK SWITCH CONDITION BY DTC 
    1. DTC B1241 is output when the back door power window switch, the defogger switch and the rear power window switch are on. When these switches are off, this DTC is not output.

    Using this DTC, you can check whether these switches are normal or not.

  11. PERFORM ACTIVE TEST WITH HAND-HELD TESTER 
    1. The active test will indicate if the part is normal or malfunctioning.
    BACK DOOR ECU ACTIVE TEST

    Operation Item Label Operation
    Operate back door power window UP/DOWN P/W UP/DOWN Close/Open
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