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Wiper System & Washer System Acura MDX II

Wiper/washer Systems 38 illustrations ~3078 words

Scheme 1

Scheme 1: Component Location Index
Scheme 1: Component Location Index

Scheme 2

Scheme 2
Scheme 2

Scheme 3

Scheme 3: Circuit Diagram - Windshield
Scheme 3: Circuit Diagram - Windshield

Scheme 4

Scheme 4
Scheme 4

Scheme 5

Scheme 5: Circuit Diagram - Headlight Washer
Scheme 5: Circuit Diagram - Headlight Washer

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7: Circuit Diagram - Rear Window
Scheme 7: Circuit Diagram - Rear Window

Scheme 8

Scheme 8
Scheme 8

DTC B1076: Windshield Wiper Switch Backup Circuit Malfunction

Note. If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

  1. Clear the DTCs with the HDS.
  2. Turn the ignition switch to LOCK (0), and then back ON (II).
  3. Turn the windshield wiper switch ON for 5 seconds and OFF.
  4. Check for DTCs with the HDS. Is DTC B1076 indicated? YES - Go to step 5. NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections.
  5. Select BODY ELECTRICAL system select menu, then enter the DATA LIST menu.
  6. Check the ON/OFF information of the FR WIPER BACK-UP with the HDS. Is OFF indicated? YES - Go to step 7. NO - Check for a short in the wire between the combination switch control unit and the relay control module (WIPER BACK-UP line), if the harness is OK, replace the combination switch control unit (see «WIPER/WASHER SWITCH REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/wiperwasher-systems/#wiper-system-washer-system__wiperwasher-switch-replacement) ).
  7. Turn the windshield wiper switch ON.
  8. Check the ON/OFF information of the FR WIPER BACK-UP with the HDS. Is ON indicated? YES - Go to the relay control module input test (see «RELAY CONTROL MODULE INPUT TEST»(/acura/mdx/ii-2006-2010/remont/communication-devices/#multiplex-integrated-control-system__relay-control-module-input-test) ) and check for a poor ground, if the GND line is OK, replace the under-hood fuse/ relay box (see «REMOVAL AND INSTALLATION»(/acura/mdx/ii-2006-2010/remont/body-electrical/#under-hood-fuserelay-box) ). NO - Check for an open in the wire between the combination switch control unit and the relay control module (WIPER BACK-UP line), if the wire is OK, replace the combination switch control unit (see «WIPER/WASHER SWITCH REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/wiperwasher-systems/#wiper-system-washer-system__wiperwasher-switch-replacement) ).

Scheme 9

Scheme 9: DTC B1077: Windshield Wiper Auto Switch Circuit Malfunction
Scheme 9: DTC B1077: Windshield Wiper Auto Switch Circuit Malfunction

Scheme 10

Scheme 10
Scheme 10

Scheme 11

Scheme 11
Scheme 11
  1. Turn the ignition switch ON (II), and the windshield wiper switch ON.
  2. Check the windshield wiper operation. Does the wiper work? YES - Go to step 3. NO - Go to step 13 .
  3. Clear the DTC with the HDS.
  4. Turn the ignition switch to LOCK (0), and then back ON (II).
  5. Turn the windshield wiper switch ON, and then OFF.
  6. Check for DTCs with the HDS. Is DTC B1077 indicated? YES - Go to step 7. NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections.
  7. Select BODY ELECTRICAL system select menu, then enter the DATA LIST menu.
  8. Check the ON/OFF information of the FR WIPER AS with the HDS. Is OFF indicated when the motor is stopped, and ON intermittently indicated when the motor runs? YES - Faulty relay control module, replace the under-hood fuse/relay box (see «REMOVAL AND INSTALLATION»(/acura/mdx/ii-2006-2010/remont/body-electrical/#under-hood-fuserelay-box) ). NO - Go to step 9.
  9. Turn the ignition switch to LOCK (0).
  10. Disconnect the windshield wiper motor 5P connector.
  11. Disconnect under-hood fuse/relay box connector A (4P).
  12. Check for continuity between the windshield wiper motor 5P connector No. 4 terminal and the under-hood fuse/relay box connector A (4P) No. 2 terminal. Is there continuity? YES - Faulty relay control module, replace the under-hood fuse/relay box (see «REMOVAL AND INSTALLATION»(/acura/mdx/ii-2006-2010/remont/body-electrical/#under-hood-fuserelay-box) ). NO - Repair open in the wire.
  13. Check the No. 11 (30 A) and No. 31 (15 A) fuses in the under-dash fuse/relay box. Are the fuses OK? YES - Go to step 12 . NO - Replace the fuse(s) and recheck the system.
  14. Turn the ignition switch to LOCK (0).
  15. Check the No. 11 (30 A) and No. 31 (15 A) fuses in the under-dash fuse/relay box. Are the fuses OK? YES - Go to step 16. NO - Replace the fuse and recheck the system.
  16. Do the wiper motor test (see «WIPER MOTOR TEST»(/acura/mdx/ii-2006-2010/remont/wiperwasher-systems/#wiper-system-washer-system) ). Does the wiper motor run normally? YES - Go to step 17. NO - Replace the windshield wiper motor and recheck.
  17. Disconnect the windshield wiper motor 5P connector.
  18. Disconnect under-hood fuse/relay box connector A (4P).
  19. Check for continuity between the windshield wiper motor 5P connector No. 3 and No. 5 terminals and the under-hood fuse/relay box connector A (4P) No. 3 and No. 4 terminals. Is there continuity? YES - Go to step 20. NO - Repair open in the wire.
  20. Check for continuity between the windshield wiper motor 5P connector No. 2 terminal and body ground. Is there continuity? YES - Faulty relay control module, replace the under-hood fuse/relay box (see «REMOVAL AND INSTALLATION»(/acura/mdx/ii-2006-2010/remont/body-electrical/#under-hood-fuserelay-box) ). NO - Repair open in the wire or poor ground (G401).

DTC B1281: Windshield Wiper Switch MIST Position Circuit Malfunction; DTC B1282: Windshield Wiper Switch INT (AUTO) Position Circuit Malfunction; DTC B1283: Windshield Wiper Switch LOW Position Circuit Malfunction; DTC B1284: Windshield Wiper Switch HIGH Position Circuit Malfunction

Note. If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).

  1. Clear the DTCs with the HDS.
  2. Turn the ignition switch to LOCK (0), and then back ON (II).
  3. Turn the windshield wiper switch to MIST, and wait for 2 seconds.
  4. Turn the windshield wiper switch OFF, and wait for 2 seconds.
  5. Turn the windshield wiper switch to INT (AUTO), and wait for 2 seconds.
  6. Turn the windshield wiper switch to LOW, and wait for 2 seconds.
  7. Turn the windshield wiper switch in HIGH, and wait for 2 seconds.
  8. Check for DTCs with the HDS. Is DTC B1281, B1282, B1283, and/or B1284 indicated? YES - Replace the wiper/washer switch. NO - Intermittent failure, the wiper/washer switch and the combination switch control unit are OK at this time. Check for loose or poor connections.

Wiper/Washer Switch (Combination Switch Control Unit) Input Test

Note. Before testing the combination switch 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 ).

Scheme 12

Scheme 12: Wiper/Washer Switch (Combination Switch Control Unit) Input Test
Scheme 12: Wiper/Washer Switch (Combination Switch Control Unit) Input Test
  1. Remove the dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#dashboard) ).
  2. Remove the steering column covers (see «COLUMN COVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#dashboard__column-cover-removalinstallation) ).
  3. Disconnect the 8P connector (A) from the wiper/washer switch (B).
  4. 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 5.
  5. 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 6. CAVITY AND TEST CONDITION CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 1 WHT Under all conditions Check for continuity between the No. 1 terminal and the under-hood fuse/relay box connector E (14P) No. 11 terminal: There should be continuity. An open in the wire Disconnect under-hood fuse/relay box connector E (14P) and the under-dash fuse/relay box connector P (30P) Check for continuity to ground: There should be no continuity. A short to ground in the wire 2 LT BLU Under all conditions Check for continuity between the No. 2 terminal of the combination switch control unit and the headlight leveling control unit No. 16 terminal: There should be continuity. An open in the wire 4 LT GRN Under all conditions Check for continuity between the No. 4 terminal and under-dash fuse/relay box connector N (45P) No. 28 terminal: There should be continuity. An open in the wire Disconnect under-dash fuse/relay box connector N (45P) Check for continuity to ground: There should be no continuity. A short to ground in the wire 5 PNK Under all conditions Check for continuity between the No. 5 terminal and the under-hood fuse/relay box connector E (14P) No. 12 terminal: There should be continuity. An open in the wire Disconnect under-hood fuse/relay box connector E (14P) Check for continuity to ground: There should be no continuity. A short to ground in the wire
  6. Reconnect the 8P connector to the wiper/washer switch, 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, replace the wiper/washer switch (combination switch control unit). CAVITY AND TEST CONDITION CHART Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained 3 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground (G601) An open in the wire 8 WHT Under all conditions 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. 7 (10 A) fuse in the under-dash fuse/relay box Faulty under-dash fuse/relay box An open in the wire 7 YEL Ignition switch ON (II) Measure the voltage to ground: There should be battery voltage. Blown No. 21 (7.5 A) fuse in the under-dash fuse/relay box An open in the wire

Wiper/Washer Switch Replacement

Note. The wiper/washer switch is built into the combination switch control unit. For the wiper/washer test, refer to the COMBINATION SWITCH CONTROL UNIT INPUT TEST (see ).

Scheme 13

Scheme 13: Wiper/Washer Switch Replacement
Scheme 13: Wiper/Washer Switch Replacement
  1. Remove the dashboard lower cover (see «DRIVER'S DASHBOARD LOWER COVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#dashboard) ).
  2. Remove the steering column covers (see «COLUMN COVER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#dashboard__column-cover-removalinstallation) ).
  3. Disconnect the combination light switch 20P connector (A), and dashboard wire harness 8P connector (B) from the wiper/washer switch (C).
  4. Remove the two screws, then slide out the wiper/washer switch.

Scheme 14

Scheme 14: Canada models
Scheme 14: Canada models

Scheme 15

Scheme 15
Scheme 15

Scheme 16

Scheme 16
Scheme 16
  1. Carefully pry the switch out from the dashboard.
  2. Disconnect the 5P connector (A) from the headlight washer switch (B).
  3. Check for continuity between the terminals in each switch position according to the table.
  4. If the continuity is not as specified, replace the bulb (C) or the headlight washer switch.
  5. Install the switch in the reverse order of removal.

Scheme 17

Scheme 17: Windshield
Scheme 17: Windshield
  1. Open the hood, and remove the wiper arms (see «WIPER MOTOR REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/wiperwasher-systems/#wiper-system-washer-system) ). NOTE: Carefully remove the wiper arms so that they do not touch the hood.
  2. Remove the cowl covers (see «COWL COVER REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#exterior-trim__cowl-cover-replacement) ).
  3. Disconnect the 5P connector (A) from the windshield wiper motor (B).
  4. Test the motor by connecting battery power to the windshield wiper motor 5P connector No. 3 terminal and ground to the No. 2 terminal. The motor should run at low speed. If the motor does not run or fails to run smoothly, replace the motor.
  5. Test the motor by connecting battery power to the windshield wiper motor 5P connector No. 5 terminal and ground to the No. 2 terminal. The motor should run at high speed. If the motor does not run or fails to run smoothly, replace the motor (see «WIPER MOTOR REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/wiperwasher-systems/#wiper-system-washer-system) ).
  6. Connect an analog ohmmeter between the windshield wiper motor 5P connector No. 1 and No. 4 terminals, and run the motor at low or high speed. The ohmmeter should indicate continuity and no continuity alternately. If it does not, replace the motor.

Scheme 18

Scheme 18: Rear Window
Scheme 18: Rear Window
  1. Open the tailgate, and remove the tailgate lower panel (see «TRIM REMOVAL/INSTALLATION - TAILGATE AREA»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-tailgate-area) ).
  2. Disconnect the 4P connector (A) from the rear window wiper motor (B).
  3. Test the motor by connecting battery power to the rear window wiper motor 4P connector No. 1 terminal and ground to the No. 2 terminal. The motor should run. If the motor does not run or fails to run smoothly, replace the motor (see «REAR WINDOW WIPER MOTOR REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/wiperwasher-systems/#wiper-system-washer-system) ).
  4. Connect an analog ohmmeter between the rear window wiper motor 4P connector No. 2 and No. 3 terminals. The ohmmeter should indicate continuity and no continuity alternately. If it does not, replace the motor.

Scheme 19

Scheme 19: Washer Motor Test
Scheme 19: Washer Motor Test
  1. Remove the right inner fender (see «FRONT INNER FENDER REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#fenderwell__front-inner-fender-replacement) ).
  2. Disconnect the 2P connector (A) from the washer motor (B).
  3. Test the motor by connecting battery power to the No. 2 (No. 1) terminal and ground the No. 1 (No. 2) terminal of the washer motor. The motor should run. ( ): Rear window washer direction. If the motor does not run or fails to run smoothly, replace it. If the motor runs smoothly, but little or no washer fluid is pumped, check for a disconnected or blocked washer hose, or a clogged washer motor outlet.

Scheme 20

Scheme 20: Washer Fluid Level Switch Test
Scheme 20: Washer Fluid Level Switch Test
  1. Remove the right inner fender (see «FRONT INNER FENDER REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#fenderwell__front-inner-fender-replacement) ).
  2. Disconnect the 2P connector (A) from the washer fluid level switch.
  3. Remove the washer fluid level switch from the washer reservoir. NOTE: Fluid may flow out of the opening.
  4. Check for continuity between the No. 1 and No. 2 terminals in each float position. There should be continuity when the float is down. There should be no continuity when the float is up.
  5. If the continuity is not as specified, replace the switch.

Scheme 21

Scheme 21: Wiper Motor Replacement
Scheme 21: Wiper Motor Replacement

Scheme 22

Scheme 22
Scheme 22

Scheme 23

Scheme 23
Scheme 23
  1. Open the hood. Remove the caps, nuts (A), and the windshield wiper arms (B).
  2. Remove the cowl covers (see «COWL COVER REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#exterior-trim__cowl-cover-replacement) ).
  3. Disconnect the 5P connector (A) from the wiper motor.
  4. Remove the three bolts (B) and the wiper linkage assembly (C).
  5. Make sure the mark of the link to show the original adjustment. Separate the windshield wiper linkage (B) from the wiper motor (C).
  6. Install in the reverse order of removal, and note these items: Align the marks of the link and the linkage to install the linkage with the original adjustment. Apply multipurpose grease to the moving parts. Before installing the wiper arms, turn the wiper switch ON, then OFF to return the shafts to the park position. If necessary, replace any damaged clips.
  7. After installation, adjust the wiper arms (see «WIPER ARM/NOZZLE ADJUSTMENT»(/acura/mdx/ii-2006-2010/remont/wiperwasher-systems/#wiper-system-washer-system) ).

Scheme 24

Scheme 24: Rear Window Wiper Motor Replacement
Scheme 24: Rear Window Wiper Motor Replacement

Scheme 25

Scheme 25
Scheme 25
  1. Open the tailgate, and remove the tailgate lower trim panel (see «TRIM REMOVAL/INSTALLATION - TAILGATE AREA»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-tailgate-area) ).
  2. Remove the mounting nut (A), the wiper arm (B) and the special nut (C).
  3. Disconnect the 4P connector (A) and remove the three mounting bolts (B), then remove the rear window wiper motor (C).
  4. Install in the reverse order of removal.

Scheme 26

Scheme 26: Washer Reservoir Replacement
Scheme 26: Washer Reservoir Replacement

Scheme 27

Scheme 27
Scheme 27
  1. Remove the right inner fender (see «FRONT INNER FENDER REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#fenderwell__front-inner-fender-replacement) ).
  2. Disconnect the 2P connector (A) from the washer motor(s) (B) and the washer fluid level switch (C).
  3. Disconnect the washer tubes.
  4. Remove the bolts and the washer reservoir.
  5. Install in the reverse order of removal. Check the washer motor operation.

Scheme 28

Scheme 28: Canada models
Scheme 28: Canada models
  1. Remove the right inner fender (see «FRONT INNER FENDER REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#fenderwell__front-inner-fender-replacement) ).
  2. Disconnect the 2P connector (A) from the washer motor (B).
  3. Test the motor by connecting battery power to the headlight washer motor 2P connector No. 1 terminal and ground to the No. 2 terminal. The motor should run. If the motor does not run or fails to run smoothly, replace it. If the motor runs smoothly, but little or no washer fluid is pumped, check for a disconnected or blocked washer hose, or a clogged washer motor outlet.
  4. Install the washer motor in the reverse order of removal.

Scheme 29

Scheme 29: Canada models
Scheme 29: Canada models
  1. Remove the front bumper (see «FRONT BUMPER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#bumpers__front-bumper-removalinstallation) ), and disconnect the headlight washer tubes from the washer motor.
  2. Disconnect the headlight washer tube (A) from the headlight washer nozzle (B).
  3. Remove the headlight washer nozzle cover (C).
  4. Remove the two screws and the headlight washer nozzle.
  5. Install the nozzle in the reverse order of removal. After installation, check the headlight washer operation.

Scheme 30

Scheme 30: Windshield
Scheme 30: Windshield

Scheme 31

Scheme 31
Scheme 31
  1. Lift the wiper arms from the windshield. NOTE: Lift the driver's side first.
  2. Press and hold the tab (A) and slide the wiper blade (B) toward the tab to release it from the wiper arm.
  3. Slide the rubber (A) out from the wiper blade (B).
  4. Install a new rubber to the wiper blade in the reverse order of removal.
  5. Install the wiper blades onto the wiper arms in the reverse order of removal.
  6. Check the wiper operation, if the blades slip, turn the wiper switch OFF, and reinstall the wiper blades securely.

Scheme 32

Scheme 32: Rear Window
Scheme 32: Rear Window

Scheme 33

Scheme 33
Scheme 33
  1. Lift the wiper arm from the rear window.
  2. Turn the rear wiper blade (A), release the lock, and then remove the wiper blade from the rear wiper arm (B).
  3. Raise the old rubber (A), and remove it from the wiper blade (B).
  4. Install the new rubber and the wiper blade in the reverse order of removal. NOTE: After installation, confirm that the wiper arm works smoothly.

Windshield

Wiper arms park position

Scheme 34

Scheme 34: Windshield
Scheme 34: Windshield
  1. When the wiper arms stop at the park (automatic stop) position, confirm that they are at the standard position. a: Position at about 1.6 in. (40.7 mm) from the top of cowl cover (A) b: Position at about 2.1 in. (54.3 mm) from the top of cowl cover (A) Washer nozzle position
  2. When you turn on the washers, confirm 50 % or more of the washer fluid lands within the spray area. If the spray area is not within the standard positions, adjust the nozzles. c: Position at about 6.2 in. (157.3 mm) from the top of the black ceramic area (B) at the lower windshield d: Position at about 6.2 in. (157.3 mm) from the top of the black ceramic area (B) at the lower windshield e: Position at about 11.8 in. (300 mm) from the windshield center line (C) f: Position at about 11.8 in. (300 mm) from the windshield center line (C)

Rear Window

Wiper arm park position

Scheme 35

Scheme 35: Rear Window
Scheme 35: Rear Window
  1. When the wiper arm stops at the park position, confirm that it is at the standard position. a. Position at about 0.4 in. (11.2 mm) from the black ceramic area (A) Washer nozzle position
  2. When you turn on the washers, confirm 50 % or more of the washer fluid lands within the spray area. If the spray area is not within the standard positions, adjust the nozzles. b: Position at about 5.1 in. (130.2 mm) from the rear washer nozzle (B)

Scheme 36

Scheme 36: Washer Tube Replacement
Scheme 36: Washer Tube Replacement

Scheme 37

Scheme 37
Scheme 37

Scheme 38

Scheme 38
Scheme 38
  1. Remove the washer nozzles and clips, then remove the washer tubes. Windshield/Rear Window Washers Headlight Washer (Canada models)
  2. Install the parts in the reverse order of removal. Take care not to pinch the washer tubes. Check the washer operation.