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Power Moonroof Acura MDX II

Sun Roof/t-Top/convertible Top 6 illustrations ~942 words

Scheme 33

Scheme 33: Component Location Index
Scheme 33: Component Location Index

Symptom Troubleshooting Index

SymptomDiagnostic procedure
Water leaks from moonroofCheck for a clogged drain tube. Check for a gap between the glass weatherstrip and the roof panel. Check for a defective or an improperly installed glass weatherstrip or drain channel. Check for a gap between the drain seal and the roof panel.
Wind noise from moonroofCheck for excessive clearance between the glass weatherstrip and the roof panel.
Motor noise from moonroofCheck for a loose motor. Check for a worn gear or bearing. Check for a deformed cable assembly.
Moonroof glass does not move, but motor turnsCheck for a defective gear or inner cable. Check for foreign matter stuck between the guide rail and the slider. Check for a loose inner cable. Make sure the cable assembly is attached properly.
Moonroof glass does not move and motor does not turn (glass can be moved with 5 mm hexagonal wrench)Check for a blown fuse. Check for a faulty moonroof switch. Check for a run down battery. Reset the moonroof control unit (see RESETTING THE MOONROOF CONTROL UNIT ). Check for a defective motor control unit.
Moonroof glass does not stop at proper flush closed position.Reset the moonroof control unit (see RESETTING THE MOONROOF CONTROL UNIT ). Check glass position adjustment.
Moonroof glass moves in a jerking motion (moves 40mm (1.57 in.), stops for 0.4 seconds, and repeats)Reset the moonroof control unit (see RESETTING THE MOONROOF CONTROL UNIT ).
During auto close operation, moonroof glass reverses when no object is trappedCheck for dirt and debris in the track. Reset the moonroof control unit (see RESETTING THE MOONROOF CONTROL UNIT ).
Moonroof glass moves, but there is no AUTO functionReset the moonroof control unit (see RESETTING THE MOONROOF CONTROL UNIT )

CAVITY AND TEST CONDITION CHART

Scheme 34

Scheme 34: Circuit Diagram
Scheme 34: Circuit Diagram

Scheme 35

Scheme 35
Scheme 35

Moonroof Control Unit Input Test

Note. Before testing the moonroof control unit, troubleshoot the multiplex integrated control unit first, using B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ). If the moonroof works OK manually, but will not work in AUTO, or reverses frequently (pinch detection) do the moonroof calibration (see RESETTING THE MOONROOF CONTROL UNIT ) before proceeding with the input test.

Scheme 36

Scheme 36: Moonroof Control Unit Input Test
Scheme 36: Moonroof Control Unit Input Test
  1. Remove the headliner (see «HEADLINER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__headliner-removalinstallation) ).
  2. Close the driver's door, and keep it closed until the procedure is complete.
  3. Turn the ignition switch to LOCK (0).
  4. Disconnect the 10P connector (A) from the moonroof control unit (B).
  5. 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 6.
  6. With the connector still disconnected, 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, go to step 7. CAVITY AND TEST CONDITION CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 4 GRY Under all conditions Check for continuity between the No. 4 terminal and the under-dash fuse/relay box connector X (39P) No. 15 terminal, and the No. 4 terminal and the front passenger's MPCS unit connector A (28P) No. 4 terminal: There should be continuity. An open in the wire
  7. Reconnect the connector, and 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, go to step 8. CAVITY AND TEST CONDITION CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 10 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground (G501) An open in the wire 1 GRN Under all conditions Measure the voltage to ground: There should be battery voltage. Blown No. 2 (OP1) (40 A) fuse in the main under-hood fuse box Blown No. 3 (1) fuse in the under-dash fuse/relay box An open in the wire 6 LT GRN Moon roof switch in AUTO OPEN or AUTO CLOSE position Measure the voltage to ground: There should be battery voltage. Blown No. 4 (40 A) fuse in the main under-hood fuse box Blown No. 6 (7.5 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box Faulty moonroof switch An open in the wire 7 ORN Moon roof switch in TILT position Measure the voltage to ground: There should be battery voltage. 8 PNK Moon roof switch in CLOSE position Measure the voltage to ground: There should be battery voltage. 9 LT BLU Moonroof switch in OPEN position Measure the voltage to ground: There should be battery voltage. (1) No. 3 (10 A): '07 model No. 3 (15 A): '08 model
  8. If all the input tests are OK and multiple failures are found, replace the moonroof control unit/motor assembly. If the problem is related to the key-off operation, go to the driver's MPCS unit input test (see «DRIVER'S MPCS UNIT INPUT TEST»(/acura/mdx/ii-2006-2010/remont/windows/#power-windows) ), and front passenger's MPCS unit input test (see «FRONT PASSENGER'S MPCS UNIT INPUT TEST»(/acura/mdx/ii-2006-2010/remont/windows/#power-windows) ).

Moonroof Switch Test/Replacement

Special Tools required

KTC trim tool set SOJATP2014

Note. Use the appropriate tool from the KTC trim tool set to avoid damaging components. Take care not to scratch the roof console and related parts. The moonroof can still be operated for about 10 minutes after the ignition switch is turned from the "II" to the "I" or "0" positions, as long as none of the doors have been opened. This provides a convenience to parked occupants while offering a degree of security against unwanted or accidental moonroof operation.

Scheme 37

Scheme 37: Moonroof Switch Test/Replacement
Scheme 37: Moonroof Switch Test/Replacement

Scheme 38

Scheme 38
Scheme 38
  1. Carefully pry the moonroof switch (A) out of the roof console.
  2. Disconnect the 7P connector (B) from the moonroof switch.
  3. Check for continuity between the terminals in each switch position according to (Scheme 38).
  4. If the continuity is not as specified, replace the illumination bulb (C) or the switch.
  5. Install in the reverse order of removal.

Resetting the Moonroof Control Unit

Note. Do the moonroof control unit reset with all the doors and tailgate closed. Resetting the moonroof is required when any of the following have occurred.

  1. The moonroof was moved manually with the battery dead or disconnected.
  2. The moonroof motor was replaced with a new one.
  3. Any components related to the moonroof were replaced. -Wind deflector Moonroof glass Moonroof seal Moonroof glass bracket Moonroof cables, etc.

To reset the moonroof control unit, do these steps

  1. Close all the doors and the tailgate.
  2. Turn the ignition switch to LOCK (0).
  3. Press and hold the center of the moonroof switch (tilt), and turn the ignition switch ON (II).
  4. Release the moonroof switch and turn the ignition switch to LOCK (0).
  5. Repeat steps 3 and 4 an additional four times.
  6. Pull and hold the moonroof switch (open) an additional 3 seconds after the moonroof is fully opened.
  7. Press and hold the moonroof switch (close) an additional 3 seconds after the moonroof is fully closed.
  8. Confirm that the moonroof control unit is reset by using the moonroof AUTO OPEN and AUTO CLOSE function.

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