Keyless/power Door Locks/security System Acura MDX I

Scheme 15

Scheme 16

Security Alarm System

The security alarm system is armed automatically after the doors, hood, and tailgate are closed and locked. For the system to arm, the ignition switch must be off, the key must be removed, and the security control unit must receive signals that the doors, hood, and tailgate are closed and locked. The alarm can be disarmed at any time by unlocking either door with the key or the remote transmitter.

When everything is closed and locked, the only control unit inputs that are grounded, and have 0 V, are the driver's door lock knob switch, the audio unit, DVD player, rear controller and screen, and the navigation display. In other words, all of the other switches are open, including the key cylinder switches, and they have about 10 V. 10 seconds after the doors and tailgate are locked with the key or the lock knob (with the door open), or immediately after the doors are locked with the LOCK button on the remote transmitter, the security system arms, and the security indicator on the door flashes. If the security indicator does not flash, the system is not arming. Check the doors, hood, and tailgate to see if they are closed. A beep to confirm the security alarm system is armed will sound if the LOCK button is pressed a second time within 5 seconds.

If one of the switches is misadjusted or there is a short in the system, the system will not arm. As long as the control unit continues to receive a ground signal, it senses that the vehicle is not closed and locked, and the system will not arm. Conversely, a switch that is slightly misadjusted can sound an alarm for no apparent reason. In this case, a significant change in outside temperature, the vibration of a passing truck, or someone bumping into the vehicle could cause the alarm to sound. There is no glass breakage or motion detector feature.

If anything is opened or improperly unlocked after the system is armed, the control unit receives a ground signal from that switch, and the 10 V reference drops to 0 V. If the audio unit, navigation display, DVD player, or rear controller and screen is disconnected, the input loses its ground, and the input voltage goes to 10 V. The system sounds the alarm when any of these things occur

1. The ignition switch is turned ON (II)
2. A door or tailgate is forced open
3. A door is unlocked without using the key or the remote transmitter
4. The hood is opened
5. The audio unit, navigation display, DVD player, or rear controller and screen is disconnected
6. The panic mode is activated When the system sounds the alarm, the horns sound and the exterior lights flash for 2 minutes. The alarm can be stopped at any time by unlocking either door with the key or by pressing any button on the remote transmitter.

Panic Mode

The panic mode allows the security system to sound the alarm with the remote transmitter in order to attract attention. When the PANIC button is pressed and held for 2 seconds, the alarm will sound and the exterior lights will flash for about 30 seconds.

The panic mode can be canceled at anytime by pressing any button on the remote transmitter or by turning the ignition switch ON (II). The panic mode will not function if the ignition switch is ON (II).

Keyless Entry System

The security alarm system is integrated with the keyless entry and multiplex systems. The passenger's multiplex control unit receives LOCK (arm) and UNLOCK (disarm), and Panic signals from the keyless entry control unit. The keyless entry system allows you to lock and unlock the vehicle with the remote transmitter. When you press the LOCK button, all doors lock. When you press the UNLOCK button once, only the driver's door unlocks. The other doors and the tailgate will unlock when you press the button a second time.

When the switch for the front individual light is in the center position (rear individual lights is in "door" position), they will come on when you press the UNLOCK button. If you do not open a door, the lights will go off in about 30 seconds, the doors will automatically relock, and the security system will rearm. If you relock the doors with the remote transmitter within 30 seconds, the lights will go off immediately.

You cannot lock the doors with the remote transmitter if a door or the tailgate is not fully closed, or if the key is in the ignition switch. If the tailgate or hood is not closed, the doors will lock and unlock, but the security system will not arm until the tailgate and hood are closed.

The system will signal you when the doors lock and unlock by flashing the parking lights, side marker lights, and taillights: once when they lock, and twice when they unlock.

When you press the LOCK button a second time within 5 seconds after you have locked the doors, the horns will sound once to verify that vehicle is secure and the security system is set.

If the lights do not flash, make sure the doors, the hood, and the tailgate are closed and locked. The most common failure is a door, hood, tailgate, lock knob, ignition key, or door/tailgate key cylinder input. Check that the security indicator blinks. If the security alarm system does not arm, refer to the multiplex mode or security input tests.

Recalling a Memorized Driving Position (With DPMS)

The transmitter has a function to recall a memorized driving position. There are two kinds of transmitters. One is for the driving position memory switch 1, the other is for driving position memory switch 2. When the driver's door is opened after unlocking the door with the transmitter, the beeper sounds once, and the driver's seat and mirror move to the memorized driving position. When the movement is complete, the beeper sounds twice. The instructions for turning ON and OFF this feature are on the back of the keyless transmitter or (see TRANSMITTER TEST ). For '03 model, if the seat and mirror are already in position after the door is unlocked and open, there will be no beep.

Scheme 17

Scheme 18

Scheme 19

Scheme 20

Control Unit Input Test

Note. If security system arms when locking the vehicle with the key in the driver's door, but not with the remote, go to keyless receiver unit input test (see KEYLESS RECEIVER UNIT INPUT TEST ). These tests cover the door, driver's, and passenger's multiplex control units.

1. Before testing the power door lock and security control functions, troubleshoot the multiplex control system (see «TROUBLESHOOTING»(/acura/mdx/i-2000-2006/remont/communication-devices/#multiplex-control-system__troubleshooting) ).

Scheme 21

Scheme 22

Scheme 23

Scheme 24

Scheme 25

1. Remove the driver's multiplex control unit from the driver's under-dash fuse/relay box.
2. 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 3.
3. With the driver's multiplex control unit still disconnected, make these input tests at the connector and driver's under-dash fuse/relay box sockets. 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 4.
4. Reconnect the driver's multiplex control unit to the driver's under-dash fuse/relay box, turn the ignition switch ON (II) to keep the system awake, and perform the following input tests at the appropriate connectors on the back of the driver's under-dash fuse/relay box. For driver's under-dash fuse/relay box connector socket location (see «DRIVER'S UNDER-DASH FUSE/RELAY BOX»(/acura/mdx/i-2000-2006/remont/body-electrical/#fuserelay-boxes__drivers-under-dash-fuserelay-box) ). 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 1 in «PASSENGER'S UNIT»(/acura/mdx/i-2000-2006/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system) . CONTROL UNIT INPUT TEST (DRIVER'S UNIT) Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained B6 (1) YEL Hood open Check for voltage to ground: There should be less than 1 V. Poor ground (G201) Faulty hood switch An open in the wire Hood closed Check for voltage to ground: There should be 5 V or more. Faulty hood switch A short to ground in the wire B8 (1) ORN Tailgate open Check for voltage to ground: There should be less than 1 V. Poor ground (G602) Faulty tailgate latch switch An open in the wire Tailgate closed Check for voltage to ground: There should be 5 V or more. Faulty tailgate latch switch A short to ground in the wire E3 GRN/ORN Driver's door open Check for voltage to ground: There should be less than 1 V. Faulty driver's door switch An open in the wire Driver's door closed Check for voltage to ground: There should be 5 V or more. Faulty driver's door switch A short to ground in the wire E10 LT GRN/BLK Left rear door open Check for voltage to ground: There should be less than 1 V. Faulty left rear door switch An open in the wire Left rear door closed Check for voltage to ground: There should be 5 V or more. Faulty left rear door switch A short to ground in the wire M9 BLU/WHT Ignition key is in the ignition switch Check for voltage to ground: There should be less than 1 V. Poor ground (G401) Faulty ignition key switch An open in the wire Ignition key is out of the ignition switch Check for voltage to ground: There should be 5 V or more. Faulty ignition key switch A short to ground in the wire (1) Driver's Multiplex Control Unit Connector B

Scheme 26

Scheme 27

Scheme 28

Scheme 29

1. Remove the passenger's multiplex control unit from the passenger's under-dash fuse/relay box, and disconnect its connector.
2. 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 3.
3. With the passenger's multiplex control unit still disconnected, make these input tests at the connectors and the passenger's under-dash fuse/relay box sockets. 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 4. CONTROL UNIT INPUT TEST (PASSENGER'S UNIT - 1 OF 2) Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained B22 (1) BLK Under all conditions Check for continuity to ground: There should be continuity. Poor ground (G503) Faulty passenger's fuse/relay box An open in the wire A8 Fuse/relay box socket Under all conditions Check for continuity to ground: There should be continuity. Poor ground (G651) Faulty passenger's fuse/relay box An open in the wire A9 Under all conditions Attach to ground: Horns should sound. Blown No. 47 (20 A) fuse in the under-hood fuse/relay box Faulty passenger's fuse/relay box Faulty horn relay Faulty horn An open in the wire A20 Under all conditions Attach to ground: Headlights should come on. Faulty headlight relay 1 or 2 Faulty passenger's fuse/relay box An open in the wire A22 Ignition switch ON (II) Check for voltage to ground: There should be battery voltage. Blown No. 9 (10 A) fuse in the driver's under-dash fuse/relay box Faulty driver's fuse/relay box Faulty passenger's fuse/relay box An open in the wire A23 Under all conditions Check for voltage to ground: There should be battery voltage. Blown No. 12 (20 A) fuse in the passenger's under-dash fuse/relay box Faulty passenger's fuse/relay box A24 Under all conditions Check for voltage to ground: There should be battery voltage. Blown No. 13 (7.5 A) fuse in the passenger's under-dash fuse/relay box Faulty passenger's fuse/relay box A10 Fuse/relay box socket Jump A10 to battery voltage and B11 to body ground. Check driver's door lock operation: The door should lock. Faulty driver's door lock actuator Faulty passenger's fuse/relay box An open in the wire B11 (1) YEL A10 Fuse/relay box socket Jump A10 to battery voltage and A11 to body ground. Check passenger's doors lock operation: The door should lock. Faulty passenger's door lock actuator Faulty passenger's fuse/relay box An open in the wire A11 Check tailgate lock operation: The tailgate should lock. Faulty tailgate lock actuator Faulty passenger's fuse/relay box An open in the wire A1 PNK Connect A1 terminal to A24 terminal momentarily. Check keyless buzzer operation: The buzzer should sound. Poor ground (G652 (2) or G503 (3) ) Faulty keyless buzzer Faulty passenger's fuse/relay box An open in the wire B21 (1) BLU Under all conditions Check for continuity to ground: There should be continuity. Poor ground (G502) Faulty connections at the audio unit or navigation display unit Faulty audio unit or navigation display unit Faulty passenger's fuse/relay box An open in the wire (1) Passenger's Multiplex Control Unit Connector B (2) '03 Model (3) '04-'06 Models
4. Reconnect the passenger's multiplex control unit to the passenger's under-dash fuse/relay box, turn the ignition switch ON (II) to keep the system awake, and perform the following input tests at the appropriate connectors on the passenger's under-dash fuse/relay box. For passenger's under-dash fuse/relay box connector socket location (see «PASSENGER'S UNDER-DASH FUSE/RELAY BOX»(/acura/mdx/i-2000-2006/remont/body-electrical/#fuserelay-boxes__passengers-under-dash-fuserelay-box) ). NOTE: When testing passenger's door lock knob switches, begin with all doors locked, then test one at a time. 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 1 in «DOOR UNIT»(/acura/mdx/i-2000-2006/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system) . CONTROL UNIT INPUT TEST (PASSENGER'S UNIT - 2 OF 2) Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained C16 GRN Passenger's door open Check for voltage to ground: There should be less than 1 V. Faulty passenger's door switch An open in the wire Short to ground Passenger's door closed Check for voltage to ground: There should be 5 V or more. C14 GRN/WHT Right rear door open Check for voltage to ground: There should be less than 1 V. Faulty right rear door switch An open in the wire Short to ground Right rear door closed Check for voltage to ground: There should be 5 V or more. C8 RED/BLU Wake up the multiplex system by locking all doors with the power door lock switch; Left rear door lock knob switch unlocked Check for voltage to ground: There should be less than 1 V. Poor ground (G601) Faulty left rear door lock actuator An open in the wire Short to ground Wake up the multiplex system by locking all doors with the power door lock switch; Left rear door lock knob switch locked Check for voltage to ground: There should be 5 V or more. Wake up the multiplex system by locking all doors with the power door lock switch; Right rear door lock knob switch unlocked Check for voltage to ground: There should be less than 1 V. Poor ground (G652) Faulty right rear door lock actuator An open in the wire Short to ground Wake up the multiplex system by locking all doors with the power door lock switch; Right rear door lock knob switch locked Check for voltage to ground: There should be 5 V or more. E2 GRN/BLK Wake up the multiplex system by locking all doors with the power door lock switch; Passenger's door lock knob switch unlocked Check for voltage to ground: There should be less than 1 V. Poor ground (G651) Faulty passenger's door lock actuator An open in the wire Short to ground Wake up the multiplex system by locking all doors with the power door lock switch; Passenger's door lock knob switch locked Check for voltage to ground: There should be 5 V or more. E5 BLU/ORN Passenger's door lock switch in UNLOCK Check for voltage to ground: There should be less than 1 V. Poor ground (G651) Faulty passenger's door lock switch An open in the wire Short to ground Passenger's door lock switch in neutral position Check for voltage to ground: There should be 5 V or more. E6 BLK/ORN Passenger's door lock switch in LOCK Check for voltage to ground: There should be less than 1 V. Passenger's door lock switch in neutral position Check for voltage to ground: There should be 5 V or more. B21 (1) BLU Under all conditions Check for voltage to ground: There should be less than 1 V. Poor ground (G502) Poor connection at audio unit or navigation display unit Faulty audio unit or navigation display unit. An open in the wire (1) Passenger's Multiplex Control Unit Connector B

Scheme 30

1. Remove the door multiplex control unit, and disconnect its connector.
2. Inspect the connector and socket terminals to be sure they are 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 3.
3. Reconnect the connector to the door multiplex control unit, turn the ignition switch ON (II) to keep the system awake, perform 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 4. CONTROL UNIT INPUT TEST (DOOR UNIT) Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained A1 WHT/YEL Under all conditions Check for voltage to ground: There should be battery voltage. Blown No. 13 (7.5 A) fuse in the passenger's under-dash fuse/relay box An open in the wire A12 BLK Under all conditions Check for voltage to ground: There should be less than 1 V. Poor ground (G401) An open in the wire A6 BLU/WHT Driver's door key cylinder switch in LOCK Check for voltage to ground: There should be less than 1 V. Faulty driver's door key cylinder switch Poor ground (G401) An open in the wire Short to ground Driver's door key cylinder switch in the neutral position Check for voltage to ground: There should be 5 V or more. Driver's door key cylinder switch in UNLOCK Check for voltage to ground: There should be 5 V or more. A16 BLU Driver's door key cylinder switch in UNLOCK Check for voltage to ground: There should be less than 1 V. Faulty driver's door key cylinder switch Poor ground (G401) An open in the wire Short to ground Driver's door key cylinder switch in the neutral position Check for voltage to ground: There should be 5 V or more. Driver's door key cylinder switch in LOCK Check for voltage to ground: There should be 5 V or more. A7 PNK Driver's door lock knob locked Check for voltage to ground: There should be less than 1 V. Faulty driver's door lock actuator Poor ground (G401) An open in the wire Driver's door lock knob unlocked Check for voltage to ground: There should be 5 V or more. Faulty driver's door lock actuator Short to ground in the wire A17 BLK/RED Driver's door lock knob unlocked Check for voltage to ground: There should be less than 1 V. Faulty driver's door lock actuator Poor ground (G401) An open in the wire Driver's door lock knob locked Check for voltage to ground: There should be 5 V or more. Faulty driver's door lock actuator Short to ground in the wire A8 BLK/WHT Driver's door lock switch in LOCK Check for voltage to ground: There should be less than 1 V. Faulty driver's door lock switch Poor ground (G401) An open in the wire Driver's door lock switch in the neutral position Check for voltage to ground: There should be 5 V or more. Faulty driver's door lock switch Short to ground in the wire A18 GRN/RED Driver's door lock switch in UNLOCK Check for voltage to ground: There should be less than 1 V. Faulty driver's door lock switch Poor ground (G401) An open in the wire Driver's door lock switch in the neutral position Check for voltage to ground: There should be 5 V or more. Faulty driver's door lock switch Short to ground in the wire
4. 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, then recheck 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.

Scheme 31

1. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ).
2. Disconnect the 7P connector (A) from the keyless receiver 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 are OK, go to step 4.
4. 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, replace the keyless receiver unit. KEYLESS RECEIVER UNIT INPUT TEST Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 2 PNK/BLK Under all conditions Check for continuity between the No. 2 terminal and driver's multiplex control unit B19 terminal: There should be continuity. There should be no continuity to ground. An open in the wire Short to ground 3 GRN/BLU Under all conditions Check for continuity between the No. 3 terminal and driver's multiplex control unit B18 terminal: There should be continuity. There should be no continuity to ground. An open in the wire Short to ground 6 LT BLU Under all conditions Check for continuity between the No. 6 terminal and driver's multiplex control unit B21 terminal: There should be continuity. There should be no continuity to ground. An open in the wire Short to ground 1 BLK Under all conditions Check for continuity to ground: There should be continuity. Poor ground (G503) An open in the wire 5 YEL Ignition switch ON (II) Check for voltage to ground: There should be battery voltage. Blown No. 9 (10 A) fuse in the driver's under-dash fuse/relay box An open in the wire 7 WHT/YEL Under all conditions Check for voltage to ground: There should be battery voltage. Blown No. 13 (7.5 A) fuse in the passenger's under-dash fuse/relay box An open in the wire

Scheme 32

1. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/windows/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 3P connector from the actuator.
3. Check for continuity between the terminals. There should be continuity between the No. 1 and No. 2 terminals when the door lock knob switch is in the LOCK position, and no continuity when the door lock knob switch is in the UNLOCK position. There should be continuity between the No. 2 and No. 3 terminals when the door lock knob switch is in the UNLOCK position, and no continuity when the door lock knob switch is in the LOCK position.
4. If the continuity is not as specified, replace the door lock actuator.

Scheme 33

1. Remove the front passenger's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/windows/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 3P connector from the actuator.
3. Check for continuity between the terminals. There should be continuity between the No. 1 and No. 2 terminals when the door lock knob switch is in the UNLOCK position, and no continuity when the door lock knob switch is in the LOCK position.
4. If the continuity is not as specified, replace the door lock actuator.

Scheme 34

1. Remove the left rear door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/windows/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 3P connector from the actuator.
3. Check for continuity between the terminals. There should be continuity between the No. 2 and No. 3 terminals when the door lock knob switch is in the UNLOCK position, and no continuity when the door lock knob switch is in the LOCK position.
4. If the continuity is not as specified, replace the door lock actuator.

Scheme 35

1. Remove the right rear door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/windows/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 3P connector from the actuator.
3. Check for continuity between the terminals. There should be continuity between the No. 1 and No. 2 terminals when the door lock knob switch is in the UNLOCK position, and no continuity when the door lock knob switch is in the LOCK position.
4. If the continuity is not as specified, replace the door lock actuator.

Scheme 36

Scheme 37

1. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/windows/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 2P connector from the actuator.
3. Check actuator operation by connecting power and ground according to (Scheme 37). To prevent damage to the actuator, apply battery voltage only momentarily.
4. If the actuator does not operate as specified, replace it.

Scheme 38

Scheme 39

1. Remove the passenger's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/windows/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 2P connector from the actuator.
3. Check actuator operation by connecting power and ground according to (Scheme 39). To prevent damage to the actuator, apply battery voltage only momentarily.
4. If the actuator does not operate as specified, replace it.

Scheme 40

Scheme 41

1. Remove the tailgate lining (see «TRIM REMOVAL/INSTALLATION - TAILGATE AREA»(/acura/mdx/i-2000-2006/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-tailgate-area) ).
2. Disconnect the 2P connector from the actuator.
3. Check actuator operation by connecting power and ground according to (Scheme 41). To prevent damage to the actuator, apply battery voltage only momentarily.
4. If the actuator does not operate as specified, replace it.

Scheme 42

1. Open the hood.
2. Disconnect the 2P connector from the hood switch.
3. Check for continuity between the terminals. There should be continuity between the No. 1 and No. 2 terminals when the hood is opened (lever released). There should be no continuity between the No. 1 and No. 2 terminals when the hood is closed (lever pushed down).
4. If the continuity is not as specified, replace the switch.

Scheme 43

1. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/windows/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 3P connector from the key cylinder switch.
3. Check for continuity between the terminals. There should be continuity between the No. 2 and No. 3 terminals when the door key cylinder switch is in the LOCK position. There should be no continuity between the No. 2 and No. 3 terminals when the door key cylinder switch is in the neutral position or UNLOCK position. There should be continuity between the No. 1 and No. 2 terminals when the door key cylinder switch is in the UNLOCK position. There should be no continuity between the No. 1 and No. 2 terminals when the door key cylinder switch is in the neutral position or LOCK position.
4. If the continuity is not as specified, replace the switch. NOTE: Make sure the slot in the switch is properly aligned with the tab on the key cylinder.

Scheme 44

1. Remove the door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/windows/#doors__front-door-panel-removalinstallation) ).
2. Remove the two screws, then remove the door lock switch.
3. Check for continuity between the terminals. There should be continuity between the No. 1 and No. 2 terminals when the door lock switch is in the LOCK position. There should be no continuity between the No. 1 and No. 2 terminals when the door lock switch is in the neutral position or UNLOCK position. There should be continuity between the No. 2 and No. 3 terminals when the door lock switch is in the UNLOCK position. There should be no continuity between the No. 2 and No. 3 terminals when the door lock switch is in the neutral position or LOCK position.
4. If the continuity is not as specified, replace the switch.

Scheme 45

1. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/i-2000-2006/remont/windows/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 2P connector from the security indicator.
3. Test the indicator by connecting battery power to the No. 2 terminal and grounding the No. 1 terminal. The LED should come on.
4. If the LED does not come on, replace the security indicator.

Scheme 46

Scheme 47

1. Remove the right inner fender (see «FRONT INNER FENDER REPLACEMENT»(/acura/mdx/i-2000-2006/remont/exterior-body-panels/#fenderwell__front-inner-fender-replacement) ).
2. Disconnect the 2P connector (A) from the keyless buzzer (B).
3. Test the buzzer by connecting battery power to the No. 2 terminal and grounding the No. 1 terminal. You should hear a slight chirp.
4. If the buzzer fails to sound, remove the two mounting screws, and replace the buzzer.

Transmitter Test

Note. To turn the remote DPMS feature ON or OFF, press and hold the LOCK and UNLOCK buttons of the transmitter. The transmitter LED will blink once for remote DPMS ON, and blink twice for remote DPMS OFF. If the doors unlock or lock with the transmitter, but the LED on the transmitter does not come on, the LED is faulty; replace the transmitter. If DPMS is in operable using the remote, make sure the DPMS feature is ON. If any door is open, you cannot lock the door with the transmitter. If you unlocked the doors with the transmitter, but do not open any of the doors within 30 seconds, the doors relock automatically. The doors do not lock or unlock with the transmitter if the ignition key is inserted in the ignition switch.

Scheme 48

1. Press the lock or unlock button five or six times to reset the transmitter. If the locks work, the transmitter is OK. If the locks don't work, go to step 2.
2. Open the transmitter and check for water damage. If you find any water damage, replace the transmitter. If there is no water damage, go to step 3.
3. Replace the transmitter battery (A) with a new one, and try to lock and unlock the doors with the transmitter by pressing the lock or unlock button five or six times. If the doors lock and unlock, the transmitter is OK. If the doors don't lock and unlock, go to step 4.
4. Reprogram and register the transmitter, then try to lock and unlock the doors. If the doors lock and unlock, the transmitter is OK. If the doors don't lock and unlock, replace the transmitter.

Transmitter Programming

Storing transmitter codes

The codes of up to three transmitters can be stored into the keyless receiver unit memory. (If a fourth code is stored, the code which was input first will be erased.)

Note. It is important to maintain the time limits between the steps. Make sure the doors, hood and tailgate are closed.

1. Turn the ignition switch ON (II).
2. Within 1 to 4 sec., push the transmitter lock or unlock button with the transmitter aimed at the keyless receiver unit by the steering column.
3. Within 1 to 4 sec., turn the ignition switch OFF.
4. Within 1 to 4 sec., turn the ignition switch ON (II).
5. Within 1 to 4 sec., push the transmitter lock or unlock button with the transmitter aimed at the keyless receiver unit by the steering column.
6. Within 1 to 4 sec., turn the ignition switch OFF.
7. Within 4 sec., turn the ignition switch ON (II).
8. Within 1 to 4 sec., push the transmitter lock or unlock button with the transmitter aimed at the keyless receiver unit by the steering column.
9. Within 1 to 4 sec., turn the ignition switch OFF.
10. Within 4 sec., turn the ignition switch ON (II).
11. Within 1 to 4 sec., push the transmitter lock or unlock button with the transmitter aimed at the keyless receiver unit by the steering column.
12. Confirm you can hear the sound of the door lock actuators. Within 1 to 4 sec., push the transmitter lock or unlock button again.
13. Within 10 sec., aim the transmitters (up to two additional ones) whose codes you want to store at the keyless receiver unit, and press the transmitter lock or unlock buttons. Confirm that you can hear the sound of the door lock actuators after each transmitter code is stored.
14. Turn the ignition switch OFF, and pull out the key.
15. Confirm proper operation with the new code(s).

See also:
• TROUBLESHOOTING
• DRIVER'S UNDER-DASH FUSE/RELAY BOX
• PASSENGER'S UNDER-DASH FUSE/RELAY BOX
• GLOVE BOX REMOVAL/INSTALLATION
• FRONT DOOR PANEL REMOVAL/INSTALLATION
• TRIM REMOVAL/INSTALLATION - TAILGATE AREA
• FRONT INNER FENDER REPLACEMENT
• TRANSMITTER TEST
• KEYLESS RECEIVER UNIT INPUT TEST