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One Rear Window Does Not Work

  1. Testing Rear Power Window Switch & Circuit

    Remove power window switch from rear door. Disconnect harness connector. Using DVOM, check for continuity between specified terminals. See Fig 1. See Rear Passenger Power Window Switch Continuity Check  table. If continuity is not as specified, replace power window switch. If continuity is as specified, go to next step.
    Fig 1: Identifying Rear Passenger's Power Window Switch Terminals
    G00018639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Rear Passenger Power Window Switch Continuity Check

    Switch Position Terminals No. Continuity
    UP 5 & 4; 2 & 6 Yes
    OFF 4 & 6; 2 & 6 No
    DOWN 2 & 5; 4 & 6 Yes
  2. For left rear window problems, check continuity in following circuits:
    • Between power window switch harness connector terminal No. 1 (Red/Yellow wire) and body control ECU harness connector terminal B4-8 (Yellow/Red wire).
    • On Green/Yellow wire between power window switch harness connector terminal No. 6 and body control ECU harness connector terminal B4-22.
    • On Blue/Yellow wire between power window switch harness connector terminal No. 4 and RL P/W (20-amp) fuse located in instrument panel junction block.
    For right rear window problems, check continuity in following circuits:
    • On Red/Brown wire between power window switch harness connector terminal No. 1 and body control ECU harness connector terminal B5-22.
    • On Green/Black wire between power window switch harness connector terminal No. 6 and body control ECU harness connector terminal B5-10.
    • On Blue/White wire between power window switch harness connector terminal No. 4 and RR P/W (20-amp) fuse located in instrument panel junction block.
    If any circuit does not have continuity, locate and repair open/short in affected circuit as necessary. If continuity exists on all circuits, go to next step.

  3. Testing Body Control ECU

    Check all voltage inputs to body control ECU. See BODY CONTROL ECU  under PIN VOLTAGE TESTS. If any voltage inputs are not as specified, repair affected circuit and retest system. See WIRING DIAGRAMS . If all voltage inputs are as specified, substitute known-good body control ECU and retest system. If system now works properly, replace body control ECU. If system still does not work, recheck all related system wiring and connections.
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