Power Windows: Diagnosis Honda Pilot I

Control Unit Input Test

Passenger's Unit

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1. Before testing the power window control functions, troubleshoot the multiplex control system (see «TROUBLESHOOTING»(ref-174054-S13252150322005051900000) ).
2. Remove the passenger's multiplex control unit from the passenger's under-dash fuse/relay box, and disconnect its connector.
3. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to step 4.
4. With the passenger's multiplex control unit still disconnected, make these input tests at the passenger's under-dash fuse/relay box socket. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to step 5. Driver's Unit
5. Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box.
6. Inspect all connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to step 7.
7. With the driver's multiplex control unit still disconnected, make these input tests at the driver's under-dash fuse/relay box socket. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to step 8.
8. With the driver's multiplex control unit still disconnected, make these input tests at the driver's under-dash fuse/relay box socket.
9. Remove the passenger's multiplex control unit from the passenger's under-dash fuse/relay box and connect fuse/relay box socket terminal A12 to battery voltage. This turns the power window relay on. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to step 10. Door Unit
10. Remove the door multiplex control unit from the driver's door, and disconnect its connectors.
11. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to step 12.
12. With the door multiplex control unit still disconnected, make these input tests at the connectors. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to step 13.
13. If all the input tests prove OK, one of the control units must be faulty. Substitute a known-good control unit for the one that is most likely at fault using the chart below, then check the system. If the system works properly, the original control unit is faulty; replace it. If there is still a malfunction, substitute a known-good control unit for the next most likely unit to be at fault, and recheck. If the system works properly, the original unit is faulty; replace it.

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1. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(ref-174027-S15016844332005051300000) ), but leave the driver's door sub-harness connector connected to the driver's door wire harness.
2. Disconnect the 18P connector (A) from the power window control unit (B).
3. Inspect the connector and socket terminals to be sure they are all making good contact. If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to step 4.
4. With the connector still disconnected, make these input tests at the connectors. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, go to step 5.
5. Reconnect the 18P connector to the power window control unit and reconnect the passenger's multiplex control unit, then make these input tests at the connector. If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the control unit must be faulty; replace it.

Driver's Window Motor Test

Motor Test

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1. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(ref-174027-S15016844332005051300000) ).
2. Disconnect the 6P connector (A) from the window motor.
3. Test the motor in each direction by connecting battery power and ground according to the table. When the motor stops running, disconnect one lead immediately.
4. If the motor does not run or does not run smoothly, replace it. Pulser Test
5. Reconnect the 6P connector to the window motor.
6. Check for voltage between the terminals. There should be battery voltage between the No. 6 (+) and No.4 (-) terminals when the ignition switch is ON (II). Connect an analog voltmeter between the No. 5 (+) and No. 4 (-) terminals, and run the window motor at down or up. The voltmeter needle should move back and forth alternately (a digital voltmeter should show the average voltage between 0-5 V). Connect an analog voltmeter between the No. 3 (+) and No. 4 (-) terminals, and run the window motor at down or up. The voltmeter needle should move back and forth alternately (a digital voltmeter should show the average voltage between 0-5 V).

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1. Remove the passenger's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(ref-174027-S15016844332005051300000) ).
2. Disconnect the 2P connector from the window motor.
3. Test the motor by connecting battery power and ground according to the table. When the motor stops running, disconnect one lead immediately.
4. If the motor does not run or fails to run smoothly, replace it.

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1. Carefully pry off the driver's door switch trim (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(ref-174027-S15016844332005051300000) ).
2. Disconnect the power mirror and power window switch connectors (A).
3. Remove the four mounting screws, then remove the master switch (A) from the panel (B).

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1. Carefully pry off the door switch trim (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(ref-174027-S15016844332005051300000) ).
2. Disconnect the 6P connector (A) from the power window switch (B), then remove the three mounting screws and the power window switch from the switch trim (C).
3. Swap the window switch with another known-good switch and test. If the original window switch is faulty, replace it.