Test No. 50: Jam Protection Function & Auto Up Or Down Function Does Not Operate On Power Window
NOTE:
Jam protection function causes power window to stop and open half way if something becomes caught between window and window frame during power window auto up (automatic closing) operation. Auto up or down function controls automatic operation of power window. When power window switch is pushed completely downward and then released, or pulled completely upward and then released, the power window will fully open or close.
- Check jam protection limit switch on driver's door power window motor. See JAM PROTECTION LIMIT SWITCH under COMPONENT TESTS. If jam protection limit switch is okay, go to next step. If jam protection limit switch is defective, replace power window motor assembly and recheck power window operation.
- Check wiring harness and electrical connectors between jam protection limit switch on driver's door power window motor and driver's door Electronic Control Unit (ECU). See WIRING DIAGRAMS in POWER WINDOWS - CARS article. Driver's door ECU is located on the driver's door s incorporated into the power window switch assembly. See Figure. If wiring harness and electrical connector are okay, go to next step. If wiring harness or electrical connector are defective, repair as necessary and recheck power window operation.
- Check jam protection pulse switch on driver's door power window motor. See JAM PROTECTION PULSE SWITCH under COMPONENT TESTS. If jam protection pulse switch is okay, go to next step. If jam protection pulse switch is defective, replace power window motor assembly and recheck power window operation.
- Check wiring harness and electrical connectors between jam protection pulse switch on driver's door power window motor and driver's door Electronic Control Unit (ECU). Jam protection pulse switch may also be referred to as jam protection pulse sensor or pulse sensor. See WIRING DIAGRAMS in POWER WINDOWS - CARS article. If wiring harness and electrical connector are okay, go to next step. If wiring harness or electrical connector are defective, repair as necessary and recheck power window operation.
- Replace driver's door ECU with a known-good ECU and recheck power window operation. If power windows operate properly, original driver's door ECU was defective. If power windows still do not operate properly, check wiring harness and electrical connectors for driver's door ECU and power windows for an intermittent problem. See WIRING DIAGRAMS in POWER WINDOWS - CARS article. Repair wiring harness or electrical connector as necessary.