Keyless/power Door Locks/security System Acura MDX II

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Security Alarm System

The security alarm system is integrated with the multiplex integrated control system. For the system to arm, the ignition switch must be in the LOCK (0) position, the key must be removed, and the MICU must receive signals that the doors, hood, and tailgate are closed and locked. The alarm can be armed or disarmed at anytime by locking or unlocking the driver's door with the key or pressing the LOCK/UNLOCK button on the transmitter, the alarm can also be armed by locking (with the lock knob) then closing the driver's door.

When everything is closed and locked, the only inputs that are grounded, and have 0 V, are the driver's door lock knob switch (LOCK position), and the audio unit. In other words, all of the other switches are open, and have about 5.0 V in sleep mode or 12 V in awake mode, including the key cylinder switches. The security indicator in the gauge control module begins to flash immediately after the doors, tailgate, and hood are closed and locked, and then, after 20 seconds, the flashing intervals of the security indicator change to indicate that the alarm is fully armed. If the security indicator does not flash, the system is not arming. If the LOCK button is pressed a second time within 5 seconds (Keyless LOCK acknowledgment is turned ON) and the vehicle is completely closed and locked, a beep sounds and parking lights flash one time to confirm the security alarm system is armed.

If one of the switches is misadjusted or shorted internally (0 V), or there is a short in the circuit (0 V), the security system will not arm. A switch that is slightly misadjusted can cause the alarm to sound for no apparent reason. In this case, a significant change in outside air temperature, the vibration of a passing vehicle, or something 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, the 5-12 V reference drops to 0 V, and the system sounds the alarm. If the audio unit is disconnected, the input loses its ground, and the input voltage goes to 5-12 V, and the system sounds the alarm. The system sounds the alarm when any of following occur while the security system is armed

1. A door or the tailgate is forced open
2. A door is unlocked without using the key or the transmitter
3. The hood is opened
4. The audio unit (or navigation unit, rear controller and screen) is disconnected
5. The transmitter panic is operated
6. The ignition switch is turned ON (II)

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 the driver's door with the key or by pressing any button on the transmitter.

Panic Mode

The panic mode sounds the alarm in order to attract attention. When the PANIC button on the transmitter is pressed and held for about 2 seconds, the alarm sounds and the exterior lights flash for about 20 seconds.

The panic mode can be cancelled at anytime by pressing any button on the remote 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 keyless entry system is integrated with the multiplex integrated control system. Transmitters 1 and 2 (Identified on the back of each transmitter) are linked to the DPMS, the climate control settings, the custom memory settings (in the MID), the audio, the navigation and the illumination settings. Depending on which transmitter unlocks the vehicle, these settings are chosen.

Some functions of the security, keyless entry, and power door locks can be customized using the MID keyless memory setting. They include

1. AUTO DOOR LOCK: Door locking can be turned off, or turned on when shifting from Park or at a speed above 15mph.
2. AUTO DOOR UNLOCK: Door unlocking can be turned off, or turned on when shifting to Park or turning the ignition switch OFF.
3. WHENEVER UNLOCKING: Door unlocking can be set to unlock all doors or only the driver's door on the first push.
4. KEYLESS DOOR LOCK ACKNOWLEDGMENT: The beep and the front parking lights can be turned on or off when pressing the LOCK/UNLOCK button on the remote.
5. SECURITY RELOCK TIMER: Select the time (30,60, or 90 sec.) that the doors relock if you unlock the doors with the remote, but do not open any of them.
6. HEADLIGHT AUTO OFF TIMER: Select time (0,15,30, or 60 sec.) to turn the headlights off after removing the key from the ignition opening, then closing the driver's door.
7. AUTO LIGHT SENSITIVITY: Automatic lighting sensor sensitivity can be adjusted five steps (MIN/LOW/MID/HIGH/ MAX).
8. INTERIOR LIGHT DIMMING TIMER: Select the dimming time (15,30, or 60 sec.) of the interior lights after closing the door with the key removed from the ignition.

1. METER SETUP: Language-English/French/Espanol Outside air temperature-+5 +4 +3+2+10-1 -2 -3 -4 -5 Trip A an average Fuel Reset w/fill-ON/OFF Adjust alarm volume-HIGH/MID/LOW Elapsed time reset-manually only, IGN OFF, Trip A, Trip B Auto interior illumination-MAX MID LOW MIN OFF
2. POSITION SETUP: Memory position link ON/OFF Auto tilt telescope steering wheel ON/OFF NOTE: If either of these functions are turned off, they will not function with a linked remote.
3. LIGHTING SETUP: Interior light dimming time (15,30, 60 sec.) Headlight auto OFF timer (0,15, 30,60 sec.) Auto light sensitivity MAX HIGH MID LOW MIN
4. DOOR WINDOW SETUP: Auto door lock-Shift from park with vehicle speed ON or OFF-Driver's door/All doors Auto door unlock-Shift to park with ignition ON or OFF-Driver's door/All doors Key and remote unlock mode-Driver's door/All doors Keyless lock acknowledgement-ON/OFF Security relock timer (90,60,30, sec)
5. WIPER SETUP: Wiper action intermittent/with speed

The transmitters can be linked and unlinked to the keyless memory settings by pressing the LOCK and UNLOCK buttons at the same time for about 1 second. The LED on the transmitter blinks twice when unlinked, and once when linked.

The keyless entry system allows you to lock and unlock the vehicle with the transmitter. When you press the LOCK button, all the doors lock (unless any one of the doors is not fully closed or the key is in the ignition switch).

When you press the UNLOCK button the first time, only the driver's door unlocks, if keyless memory setting "WHENEVER UNLOCKING" is set to Driver's Door. The other doors unlock when you press the UNLOCK button a second time. All the doors unlock when you press the UNLOCK button the first time if keyless memory setting "WHENEVER UNLOCKING" is set to All Doors.

Note. The doors will not lock with the transmitter if a door is not fully closed, or if the ignition key is in the ignition switch.

If the UNLOCK button is pressed, released, then pressed and held, the windows and the moonroof begin to open. The windows and the moonroof stop if the button is released. The windows and moonroof cannot be closed with the remote. See power windows for more information and troubleshooting.

When the interior lights switch is in the "DOOR" position, the individual map lights will come on when the UNLOCK button is pressed. If a door is not opened, the lights will go off in about 30,60, or 90 seconds (depending on the keyless memory setting "SECURITY RELOCK TIMER"), and the doors will relock. If the doors are locked with the transmitter within 30 seconds, the lights will go off immediately.

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DTC B2179: Driver's Door Key Cylinder Switch LOCK/UNLOCK Signal Error

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 ).

Scheme 33

1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back ON (II).
3. Turn the driver's door key cylinder to the LOCK and UNLOCK positions with the ignition key.
4. Check for DTCs with the HDS. Is DTC B2179 indicated? YES - Go to step 5. NO - Intermittent failure, the driver's door key cylinder switch system is OK at this time. Check for loose or poor connections.
5. With the driver's door key cylinder switch in neutral position, select DOOR LOCK from the BODY ELECTRICAL system select menu, and enter the DATA LIST.
6. Check the ON/OFF Information of the Driver's Door Key Cylinder Switch (LOCK) and Driver's Door Key Cylinder Switch (UNLOCK) in the DATA LIST. Are both information indicators OFF? YES - Go to step 7. NO - Go to step 8 .
7. Turn the driver's door key cylinder to the LOCK and UNLOCK positions with the ignition key, and check the ON/OFF information of the Driver's Door Key Cylinder Switch (LOCK) and Driver's Door Key Cylinder Switch (UNLOCK) in the DATA LIST. Are both Driver's Door Key Cylinder Switch (LOCK) and Driver's Door Key Cylinder Switch (UNLOCK) information indicators ON at the same time with the door key cylinder switch in the LOCK or UNLOCK position? YES - Test the key cylinder switch (see «DOOR KEY CYLINDER SWITCH TEST»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system) ). If it is OK, repair the short between the No. 8 BLU and No. 9 LT BLU wires. NO - Replace the driver's MPCS unit.
8. Disconnect the driver's door lock actuator 10P connector.
9. Check the ON/OFF information of the Driver's Door Key Cylinder Switch (LOCK) and Driver's Door Key Cylinder Switch (UNLOCK) in the DATA LIST. Are both information indicators OFF? YES - Faulty driver's door key cylinder switch; replace the driver's door lock actuator assembly. NO - Go to step 10.
10. Turn the ignition switch to LOCK (0).
11. Disconnect driver's MPCS unit connector A (40P).
12. Check for continuity between body ground and the driver's door lock actuator 10P connector No. 8 and No. 9 terminals individually. Is there continuity? YES - Repair short to ground in the wire. NO - Replace the driver's MPCS unit.

DTC B2180: Driver's Door Lock Switch LOCK/ UNLOCK Signal Error

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 ).

Scheme 34

1. Clear the DTCs with the HDS.
2. Lock and unlock the driver's door with the driver's door lock switch.
3. Check for DTCs with the HDS. Is DTC B2180 indicated? YES - Go to step 4. NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections between the driver's MPCS unit and the driver's door lock switch.
4. With the driver's door lock switch in the neutral position, select the DOOR LOCK from the BODY ELECTRICAL system select menu, and enter the DATA LIST.
5. Check the ON/OFF Information of the Driver's Door Lock Switch (LOCK) and Driver's Door Lock Switch (UNLOCK). Are both information indicators OFF? YES - Go to step 6. NO - Go to step 7 .
6. Operate the driver's door lock switch in the LOCK and UNLOCK positions, and check the ON/OFF information of the Driver's Door Lock Switch (LOCK) and Driver's Door LOCK Switch (UNLOCK). Are both Driver's Door LOCK Switch (LOCK) and Driver's Door LOCK Switch (UNLOCK) information indicators ON at the same time when the door lock switch is in the LOCK or UNLOCK position? YES - Repair short between the wires. NO - Replace the driver's MPCS unit.
7. Disconnect the driver's door lock switch 5P connector.
8. Check the ON/OFF information of the Driver's Door Lock Switch (LOCK) and Driver's Door Lock Switch (UNLOCK). Are both information indicators OFF? YES - Faulty driver's door lock switch. NO - Go to step 9.
9. Disconnect driver's MPCS unit connector A (40P).
10. Check for continuity between body ground and the driver's door lock switch 5P connector No. 3 and No. 4 terminals individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Replace the driver's MPCS unit.

DTC B2181: Driver's Door Lock Knob Switch LOCK/UNLOCK Signal Error

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 ).

Scheme 35

1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back ON (II).
3. Lock and unlock the driver's door with the door lock knob switch.
4. Check for DTCs with the HDS. Is DTC B2181 indicated? YES - Go to step 5. NO - Intermittent failure, the driver's door lock knob switch system is OK at this time. Check for loose or poor connections.
5. Select DOOR LOCK from the BODY ELECTRICAL system select menu, and enter the DATA LIST.
6. Check the ON/OFF information of the Driver's Door Lock Knob Switch (LOCK) and Driver's Door Lock Knob Switch (UNLOCK) in the DATA LIST. Does the Driver's Door Lock Knob Switch (LOCK) information indicate ON and Driver's Door Lock Knob Switch (UNLOCK) information indicate OFF with the door lock knob switch is in the LOCK position, and does the Driver's Door Lock Knob Switch (LOCK) information indicate OFF and Driver's Doer Lock Knob Switch (UNLOCK) information indicate ON with the door lock knob switch is in the UNLOCK position? YES - Replace the driver's MPCS unit. NO - Go to step 7.
7. Disconnect the driver's door lock actuator 10P connector.
8. Check the ON/OFF information of the Driver's Door Knob Switch (LOCK) and Driver's Door Lock Knob Switch (UNLOCK) in the DATA LIST. Are both information indicators OFF? YES - Faulty driver's door lock knob switch; replace the driver's door lock actuator assembly. NO - Go to step 9.
9. Turn the ignition switch to LOCK (0).
10. Disconnect driver's MPCS unit connector A (40P).
11. Check for continuity between body ground and the driver's door lock actuator 10P connector No. 6 and No. 7 terminals individually, individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Replace the driver's MPCS unit.

DTC B2186: Front Passenger's Door Lock Switch LOCK/UNLOCK Signal Error

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 ).

Scheme 36

1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0), and then back ON (II).
3. Lock and unlock the front passenger's door with the door lock switch.
4. Check for DTCs with the HDS. Is DTC B2186 indicated? YES - Go to step 5. NO - Intermittent failure, the front passenger's door lock switch system is OK at this time. Check for loose or poor connections.
5. With the front passenger's door lock switch in the neutral position, select the DOOR LOCK from the BODY ELECTRICAL system select menu, and enter the DATA LIST.
6. Check the ON/OFF information of the Front Passenger's Door Lock Switch (LOCK) and Front Passenger's Door Lock Switch (UNLOCK). Are both information indicators OFF? YES - Go to step 7. NO - Go to step 8 .
7. Operate the front passenger's door lock switch in the LOCK and UNLOCK positions, and check the ON/OFF information of the Front Passenger's Door Lock Switch (LOCK) and Front Passenger's Door Lock Switch (UNLOCK). Are both the Front Passenger's Door Lock Switch (LOCK) and Front passenger's Door Lock Switch (UNLOCK) information indicators ON at the same time when the door lock switch is in the LOCK or UNLOCK position? YES - Repair short between the wires. NO - Replace the front passenger's MPCS unit.
8. Disconnect the front passenger's door lock switch 5P connector.
9. Check the ON/OFF information of the Front Passenger's Door Lock Switch (LOCK) and Front Passenger's Door Lock Switch (UNLOCK). Are both information indicators OFF? YES - Faulty front passenger's door lock switch; replace it. NO - Go to step 10.
10. Turn the ignition switch to LOCK (0).
11. Disconnect front passenger's MPCS unit connector A (28P).
12. Check for continuity between body ground and the front passenger's door lock switch 5P connector No. 3 and No. 4 terminals individually. Is there continuity? YES - Repair a short to ground in the wire. NO - Replace the front passenger's MPCS unit.

Power Door Locks/Keyless

1. If the door lock system works properly, but the vehicle does not start, refer to the immobilizer-keyless control unit symptom troubleshooting information (see «SYMPTOM TROUBLESHOOTING INFORMATION»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#immobilizer-system) ). NOTE: All functions work with the key out of the ignition switch. Only the panic function will work with the key in the ignition switch and in the LOCK (0) position. There is no keyless function with the ignition turned ON (II). POWER DOOR LOCKS/KEYLESS SYMPTOM TROUBLESHOOTING CHART No. Symptom Check Items 1 The: doors will not lock or unlock. (1) MICU input test (see «CONTROL UNIT INPUT TEST»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system__control-unit-input-test) ) Driver's door key cylinder switch test (see «DOOR KEY CYLINDER SWITCH TEST»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system) ) Door lock switch test (see «DOOR LOCK SWITCH TEST»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system) ) Door lock knob switch test (see «DOOR LOCK KNOB SWITCH TEST»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system) ) 2 The doors will not lock. (1) MICU input test (see «CONTROL UNIT INPUT TEST»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system__control-unit-input-test) ) Door lock knob switch test (see «DOOR LOCK KNOB SWITCH TEST»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system) ) Driver's door switch test (check the door switch ON/OFF information with the HDS) 3 The doors will not unlock. (1) MICU input test (see «CONTROL UNIT INPUT TEST»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system__control-unit-input-test) ) Driver's door lock knob switch test (see «DOOR LOCK KNOB SWITCH TEST»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system) ) 4 Keyless operation does not work (LOCK, UNLOCK, PANIC). Symptom troubleshooting (see «KEYLESS OPERATION DOES NOT WORK (LOCK, UNLOCK, PANIC)»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system__keyless-operation-does-not-work-lock) ). 5 Doors will not unlock with the transmitter, but will unlock with the door switch. Symptom troubleshooting (see «DOORS WILL NOT UNLOCK (OR LOCK) WITH THE TRANSMITTER, BUT WILL UNLOCK (LOCK) WITH THE DOOR SWITCH»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system__doors-will-not-unlock-or-lock) ). 6 Doors will not lock with the transmitter, but will lock with the door switch. Symptom troubleshooting (see «DOORS WILL NOT UNLOCK (OR LOCK) WITH THE TRANSMITTER, BUT WILL UNLOCK (LOCK) WITH THE DOOR SWITCH»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system__doors-will-not-unlock-or-lock) ). 7 Doors automatically relock 30,60, or 90 seconds after being unlocked with the transmitter even though a door has been opened. Driver's door switch test. Symptom troubleshooting (see «DOORS AUTOMATICALLY RELOCK 30,60, OR 90 SECONDS AFTER BEING UNLOCKED WITH THE TRANSMITTER EVEN THOUGH A DOOR HAS BEEN OPENED»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system__doors-automatically-relock-3060-or-90) ). 8 The horn does not sound and/or the headlights do not flash when PANIC button on the transmitter pressed. Symptom troubleshooting (see «THE HORN DOES NOT SOUND AND/OR THE HEADLIGHTS DO NOT FLASH WHEN THE PANIC BUTTON ON THE TRANSMITTER IS PRESSED»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system__the-horn-does-not-sound-andor) ). 9 Keyless lock or unlock operation will work even though the ignition key is in the ignition switch. Ignition key switch test (see «TEST»(/acura/mdx/ii-2006-2010/remont/ignition-switchsteering-lock/#ignition-switch__test) ). (1) If only one door is not working properly, check that door's lock actuator first, then check the other items listed in this table.

Keyless operation does not work (LOCK, UNLOCK, PANIC)

Note. Before troubleshooting, check the B-CAN DTCs. If any DTC is indicated, troubleshoot the indicated DTC first. Before troubleshooting, do the keyless transmitter test (see TRANSMITTER TEST/REPLACEMENT ).

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1. Turn the ignition switch ON (II).
2. Try to start the engine. Does the engine start? YES - The immobilizer system is OK, go to step 3. NO - Go to the immobilizer symptom troubleshooting (see «SYMPTOM TROUBLESHOOTING INDEX»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#immobilizer-system__symptom-troubleshooting-index) ).
3. Turn the ignition switch to LOCK (0).
4. Connect the HDS to the data link connector.
5. Close all doors, then turn the ignition switch ON (II).
6. Enter the BODY ELECTRICAL menu, and check the door switch parameters. Do all door switches indicate OFF? YES - Go to step 7. NO - Faulty door switch, or shorted door switch wire. Repair as necessary.
7. Remove the ignition key from the ignition switch.
8. Measure the voltage between the immobilizer-keyless control unit 7P connector No. 1 terminal and body ground. Is there battery voltage? YES - Go to step 9. NO - Check the No. 7 (10 A) fuse in the under-dash fuse/relay box. If the fuse is blown, replace the fuse and repair a short to ground in the wire. If the fuse is OK, repair open in the wire.
9. Disconnect the ignition key switch 6P connector.
10. At the ignition key switch side, check for continuity between the ignition key switch 6P connector No. 1 and No. 2 terminals. Is there continuity? YES - Faulty ignition key switch or short to ground, replace the steering lock assembly. NO - Go to step 11.
11. Insert the ignition key into the ignition switch.
12. At the ignition key switch side, check for continuity between the ignition key switch 6P connector No. 1 and No. 2 terminals. Is there continuity? YES - Go to step 13. NO - Faulty ignition key switch, replace the steering lock assembly.
13. Disconnect the immobilizer-keyless control unit 7P connector.
14. Check for continuity between the immobilizer-keyless control unit 7P connector No. 6 terminal and the ignition key switch 6P connector No. 1 terminal. is there continuity? YES - Go to step 15. NO - Repair an open in the wire.
15. Check for continuity between the immobilizer-keyless control unit 7P connector No. 6 terminal and body ground. Is there continuity? YES - Repair a short to ground in the wire. NO - Replace the immobilizer-keyless control unit.

Doors will not unlock (or lock) with the transmitter, but will unlock (lock) with the door switch

Note. Before troubleshooting, check the B-CAN DTCs. If any DTC is indicated, troubleshoot the indicated DTC first.

1. Turn the ignition switch to LOCK (0).
2. Remove the ignition key from the ignition switch.
3. Close and lock the doors.
4. Try to lock/unlock the doors with the keyless transmitter. Do the door lock actuators work normally? YES - Intermittent failure, the system is OK at this time. NO - Go to step 5.
5. Open the driver's door. Does the key-in reminder chime sound? YES - Faulty ignition key switch, or short to ground on the ignition key switch PNK wire. Repair as necessary. NO - Go to step 6.
6. Do the transmitter test (see «TRANSMITTER TEST/REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system__transmitter-testreplacement) ). Is the transmitter OK? YES - Substitute a known-good MICU and recheck. NO - Replace the transmitter.

The horn does not sound and/or the headlights do not flash when the PANIC button on the transmitter is pressed

Note. Before troubleshooting, check the B-CAN DTCs. If any DTC is indicated, troubleshoot the indicated DTC first.

1. Press the PANIC button. Does the horn sound? YES - Go to step 3 . NO - Go to step 2.
2. Press the horn button. Do the horns sound? YES - Go to step 3. NO - Check the horn circuit.
3. Turn the headlight switch ON. Do the headlights come on? YES - Go to step 4. NO - Check the lighting circuit.
4. Do the transmitter test (see «TRANSMITTER TEST/REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#keylesspower-door-lockssecurity-system__transmitter-testreplacement) ). Is the transmitter OK? YES - Substitute a known-good MICU and recheck. NO - Replace the transmitter.

Doors automatically relock 30,60, or 90 seconds after being unlocked with the transmitter even though a door has been opened

1. Turn the ceiling light switch to the DOOR position.
2. Turn the ignition switch ON (II).
3. Close all doors.
4. Watch the ceiling light and the door indicator on the gauge control module. Does the ceiling light and door indicator go off? YES - Go to step 5. NO - Repair short to ground in the wire between the MICU and door switch.
5. Open and close each door one at a time.
6. Watch the ceiling light and the door indicator on the gauge control module. Does the ceiling light and door indicator come on when the door is open, and go off when the door is closed? YES - Substitute a known-good MICU and recheck. If the symptom goes away, replace the original MICU. NO - Check for open in the wire between the MICU and the door switch. If the wire is OK, replace the door switch.

Control Unit Input Test

Note. Before testing the keyless/power door locks/security system 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 ).

MICU

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1. Turn the ignition switch to LOCK (0).
2. Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ).
3. Disconnect under-dash fuse/relay box connectors E, F, H, K, N, Q, and P. NOTE: All connector views are wire side of female terminals.
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 connectors 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 6. CONTROL INPUT TEST REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained E2 BRN Connect battery power to the E2 (E8) terminal, and the E8(E2) terminal to body ground. Check actuator operation: The left and right rear door lock actuators should LOCK (UNLOCK). Faulty left rear door lock actuator Faulty right rear door lock actuator An open in the wire E8 GRY K2 GRY Connect battery power to the K12 (K2) terminal, and the K2 (K12) terminal to body ground. Check actuator operation: The driver's door lock actuator should LOCK (UNLOCK). Faulty driver's door lock actuator An open in the wire K12 BRN N7 BRN Connect battery power to the N7 (N9) terminal, and the N9 (N7) terminal to body ground. Check actuator operation: The front passenger's door lock actuator should LOCK (UNLOCK). Faulty front passenger's door lock actuator An open in the wire N9 GRY F5 (1) PNK Connect battery power to the F5 terminal. Check tailgate release actuator operation: The tailgate should open. Faulty tailgate release actuator Poor ground(G701) Faulty rear fuse/relay box An open in the wire (1) Without power tailgate
6. Reconnect the connectors, then turn the ignition switch ON (II), and 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 7. CONTROL INPUT TEST REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained P1 BRN Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground(G502) An open in the wire E9 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 H9 Q4 E15 GRN Driver's door open Measure the voltage to ground: There should be less than 1 V. Faulty driver's door switch An open in the wire Driver's door closed Measure the voltage to ground: There should be more than 5 V. Faulty driver's door switch A short to ground in the wire H12 LT GRN Front passenger's door open Measure the voltage to ground: There should be less than 1 V. Faulty front passenger's door switch An open in the wire Front passenger's door closed Measure the voltage to ground: There should be more than 5 V. Faulty front passenger's door switch A short to ground in the wire Q2 GRY Right rear door open Measure the voltage to ground: There should be less than 1 V. Faulty right rear door switch An open in the wire Right rear door closed Measure the voltage to ground: There should be more than 5 V. Faulty right rear door switch A short to ground in the wire Q8 GRN Left rear door open Measure the voltage to ground: There should be less than 1 V. Faulty left rear door switch An open in the wire Left rear door closed Measure the voltage to ground: There should be more than 5 V. Faulty left rear door switch A short to ground in the wire P12 RED Under all conditions Measure the voltage to ground: There should be less than 1 V. Faulty connection at the audio unit, navigation unit, and/or rear controller and screen Faulty audio unit Faulty navigation unit Faulty rear controller and screen An open in the wire Poor ground (G504) P16 GRN Transmission range switch in P position Measure the voltage to ground: There should be less than 1 V. Faulty transmission range switch An open in the wire Poor ground(G101) Transmission range switch in any other position than P Measure the voltage to ground: There should be more than 5 V. Faulty transmission range switch A short to ground in the wire Rear Fuse/Relay Box
7. Turn the ignition switch to LOCK (0).
8. Remove the le ft rear trim (see «TRIM REMOVAL/INSTALLATION - REAR SIDE AREA»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-rear-side-area) ).
9. Disconnect rear fuse/relay box connectors B (34P) and C (42P).
10. 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 11.
11. With the connectors 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 12. CONTROL INPUT TEST REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained C23 (1) PNK Connect battery power to the C23 terminal momentarily. Check tailgate release actuator operation: The tailgate should open. Poor ground(G701) Faulty tailgate release actuator An open in the wire C37 ORN Connect battery power to the C37 terminal momentarily. Check keyless buzzer operation: The keyless buzzer should sound. Faulty keyless buzzer Poor ground (G702) (2) (G603) (3) An open in the wire (1) Without power tailgate (2) '07 model (3) '08 model
12. Reconnect the connectors, then turn the ignition switch ON (II), and 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. CONTROL INPUT TEST REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained B4 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 An open in the wire C6 LT GRN Tailgate open Measure the voltage to ground: There should be less than 1 V. Poor ground(G702) Faulty tailgate latch switch An open in the wire Tailgate closed Measure the voltage to ground: There should be more than 5 V. Faulty tailgate latch switch A short to ground in the wire C7 (1) ORN Tailgate outer handle pulled Measure the voltage to ground: There should be less than 1 V. Poor ground(G702) Faulty tailgate outer handle switch An open in the wire Tailgate outer handle released Measure the voltage to ground: There should be more than 5 V. Faulty tailgate outer handle switch A short to ground in the wire (1) Without power tailgate Driver's MPCS Unit
13. Turn the ignition switch to LOCK (0).
14. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
15. Disconnect driver's MPCS unit connectors A(40P) and B (14P).
16. 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 17.
17. With the connectors 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 18. CONTROL INPUT TEST REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A8 GRY Under all conditions Check for continuity between the A8 terminal and the front passenger's MPCS unit connector A (28P) No. 4 terminal: There should be continuity. Faulty under-dash fuse/relay box An open in the wire Check for continuity to ground: There should be no continuity. Faulty under-dash fuse/relay box A short to ground in the wire A23 • A27 PNK • BRN Driver's door lock switch in UNLOCK Check for continuity between the terminals: There should be continuity. Faulty driver's door lock switch An open in the wire Driver's door lock switch in neutral or LOCK Check for continuity between the terminals: There should be no continuity. Faulty driver's door lock switch A short to ground in the wire A24 • A27 RED • BRN Driver's door lock switch in LOCK Check for continuity between the terminals: There should be continuity. Faulty driver's door lock switch An open in the wire Driver's door lock switch in neutral or UNLOCK Check for continuity between the terminals: There should be no continuity. Faulty driver's door lock switch A short to ground in the wire. A27 • A4 BRN • GRY Connect the A7 and A27 terminals, and A4 and A5 terminals with jumper wires Check the driver's door lock switch lights: The switch light should come on. Faulty driver's door lock switch Blown bulb An open in the wire
18. Reconnect the connectors, then turn the ignition switch ON (II), and 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 19. CONTROL INPUT TEST REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A5 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 B14 A7 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 A27 BRN A25 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 Faulty under-dash fuse/relay box An open in the wire A1 GRN Driver's door lock knob switch in UNLOCK Measure the voltage to ground: There should be less than 1 V. Poor ground (G601) Faulty driver's door lock knob switch An open in the wire Driver's door lock knob switch in LOCK Measure the voltage to ground: There should be battery voltage. Faulty driver's door lock knob switch A short to ground in the wire A2 PUR Driver's door lock knob switch in LOCK Measure the voltage to ground: There should be less than 1 V. Poor ground (G601) Faulty driver's door lock knob switch An open in the wire Driver's door lock knob switch in UNLOCK Measure the voltage to ground: There should be battery voltage. Faulty driver's door lock knob switch A short to ground in the wire A21 BLU Driver's door key cylinder switch in UNLOCK Measure the voltage to ground: There should be less than 1 V. Poor ground (G601) Faulty driver's door key cylinder switch ? An open in the wire Driver's door key cylinder switch in neutral or LOCK Measure the voltage to ground: There should be battery voltage. Faulty driver's door key cylinder switch A short to ground in the wire A22 LT BLU Driver's door key cylinder switch in LOCK Measure the voltage to ground: There should be less than 1 V. Poor ground (G601) Faulty driver's door key cylinder switch An open in the wire Driver's door key cylinder switch in UNLOCK Measure the voltage to ground: There should be battery voltage. Faulty driver's door key cylinder switch A short to ground in the wire A6 GRN Left rear door lock knob switch in UNLOCK Measure the voltage to ground: There should be less than 1 V. Poor ground (G601) Faulty left rear door lock knob switch An open in the wire Left rear door lock knob switch in LOCK Measure the voltage to ground: There should be battery voltage. Faulty left rear door lock knob switch A short to ground in the wire Front Passenger's MPCS Unit
19. Turn the ignition switch to LOCK (0).
20. Remove the front passenger's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
21. Disconnect front passenger's MPCS unit connectors A(28P) and B (14P).
22. 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 23.
23. With the connectors 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 24. CONTROL INPUT TEST REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A4 GRY Under all conditions Check for continuity between the A4 terminal and the driver's MPCS unit connector A (40P) No. 8 terminal: There should be continuity. Faulty under-dash fuse/relay box An open in the wire Check for continuity to ground: There should be no continuity. Faulty under-dash fuse/relay box A short to ground in the wire A15 • A20 PNK • BRN Front passenger's door lock switch in LOCK Check for continuity between the terminals: There should be continuity. Faulty front passenger's door lock switch An open in the wire Front passenger's door lock switch in neutral or UNLOCK Check for continuity between the terminals: There should be no continuity. Faulty front passenger's door lock switch A short to ground in the wire A16 • A20 ORN • BRN Front passenger's door lock switch in UNLOCK Check for continuity between the terminals: There should be continuity. Faulty front passenger's door lock switch An open in the wire Front passenger's door lock switch in neutral or LOCK Check for continuity between the terminals: There should be no continuity. Faulty front passenger's door lock switch A short to ground in the wire. A20 • A1 BRN • GRY Connect the A2 and A20 terminals, and A1 and A7 terminals with jumper wires Check the front passenger's door lock switch lights: The switch light should come on. Faulty front passenger's door lock switch Blown bulb An open in the wire
24. Reconnect the connectors, then turn the ignition switch ON (II), and 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 25. CONTROL INPUT TEST REFERENCE Cavity Wire Test condition Test: Desired result Possible cause if desired result is not obtained A7 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground(G506) An open in the wire B14 BLK Under all conditions Measure the voltage to ground: There should be less than 0.5 V. Poor ground(G507) An open in the wire A2 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 A20 BRN A17 RED Front passenger's door lock knob switch in UNLOCK Measure the voltage to ground: There should be less than 1 V. Poor ground (G506) Faulty front passenger's door lock knob switch An open in the wire Front passenger's door lock knob switch in LOCK Measure the voltage to ground: There should be battery voltage. Faulty front passenger's door lock knob switch A short to ground in the wire A26 PUR Right rear door lock knob switch in UNLOCK Measure the voltage to ground: There should be less than 1 V. Poor ground(G606) Faulty right rear door lock knob switch An open in the wire Right rear door lock knob switch in LOCK Measure the voltage to ground: There should be battery voltage. Faulty right rear door lock knob switch A short to ground in the wire
25. If multiple failures are found on more than one control unit, replace the under-dash fuse/relay box (includes the MICU) (see «REMOVAL AND INSTALLATION»(/acura/mdx/ii-2006-2010/remont/body-electrical/#under-dash-fuserelay-box__removal-and-installation) ). If input failures are related to a particular control unit, replace the control unit.

Scheme 47

Scheme 48

1. Remove the door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 10P connector (A) from the actuator (B). NOTE: The illustration shows the driver's door.
3. Check actuator operation by connecting power and ground according to (Scheme 48). To prevent damage to the actuator, apply battery voltage only momentarily.
4. If the actuator does not operate as specified, replace it.

Scheme 49

Scheme 50

1. Remove the door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 10P connector (A) from the actuator (B). NOTE: The illustration shows the front passenger's door.
3. Check actuator operation by connecting power and ground according to (Scheme 50). To prevent damage to the actuator, apply battery voltage only momentarily.
4. If the actuator does not operate as specified, replace it.

Scheme 51

1. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 10P connector (A) from the actuator (B).
3. Check for continuity between the terminals. There should be continuity between the No. 6 and No. 5 terminals when the door lock knob switch is in the LOCK position and no continuity when the switch is in the UNLOCK position. There should be continuity between the No. 7 and No. 5 terminals when the door lock knob switch is in the UNLOCK position and no continuity when the switch is in the LOCK position.
4. If the continuity is not as specified, replace the door lock actuator.

Scheme 52

1. Remove the passenger's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 10P connector (A) from the actuator (B). NOTE: The illustration shows the front passenger's door.
3. Check for continuity between the terminals. There should be continuity between the No. 8 [No. 7] and No. 10 [No. 5] terminals when the door lock knob switch in the UNLOCK position and no continuity when the switch is in the LOCK position. [ ] : Left rear door
4. If the continuity is not specified, replace the door lock actuator.

Scheme 53

1. Remove the door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 5P connector (A), remove the two screws, then remove the door lock switch (B).
3. Check for continuity between the terminals. There should be continuity between the No. 5 and No. 4 terminals when the door lock switch is in the LOCK position. There should be no continuity between the No. 5 and No. 4 terminals when the door lock switch is in the neutral position or UNLOCK position. There should be continuity between the No. 5 and No. 3 terminals when the door lock switch is in the UNLOCK position. There should be no continuity between the No. 5 and No. 3 terminals when the door lock switch is in the neutral position or LOCK position. There should be continuity between the No. 2 (+) and No. 1 (-) terminals (bulb check).
4. If the continuity is not as specified, replace the bulb or switch.

Scheme 54

1. Remove the driver's door panel (see «FRONT DOOR PANEL REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__front-door-panel-removalinstallation) ).
2. Disconnect the 10P connector (A) from the key cylinder switch (B).
3. Check for continuity between the terminals. There should be continuity between the No. 9 and No. 5 terminals when the door key cylinder switch is in LOCK position. There should be no continuity between the No. 9 and No. 5 terminals when the door key cylinder switch is in the neutral or UNLOCK position. There should be continuity between the No. 8 and No. 5 terminals when the door key cylinder switch is in UNLOCK position. There should be no continuity between the No. 8 and No. 5 terminals when the door key cylinder switch is in the neutral or LOCK position.
4. If the continuity is not as specified, replace the door key cylinder assembly (see «FRONT DOOR OUTER HANDLE REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#doors__front-door-outer-handle-replacement) ).

Scheme 55

1. Open the hood.
2. Disconnect the 2P connector (A) from the hood switch (B).
3. Check for continuity between the terminals. There should be continuity between the No. 1 and No. 2 terminals when the hood is opened (latch released). There should be no continuity between the No. 1 and No. 2 terminals when the hood is closed (latch pushed down).
4. If the continuity is not as specified, replace the hood latch (see «HOOD LATCH REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#openers) ).

Scheme 56

1. Remove the rear bumper (see «REAR BUMPER REMOVAL/INSTALLATION»(/acura/mdx/ii-2006-2010/remont/exterior-body-panels/#bumpers__rear-bumper-removalinstallation) ).
2. Disconnect the 2P connector (A) from the keyless buzzer (B).
3. Test the buzzer by connecting battery power to the No. 1 terminal and ground to the No. 2 terminal. The buzzer should sound.
4. If the buzzer does not sound, replace it.
5. Install the buzzer in the reverse order of removal.

Scheme 57

1. Remove the tailgate trim panel (see «TRIM REMOVAL/INSTALLATION - TAILGATE AREA»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-tailgate-area) ).
2. Disconnect the 2P connector (A) from the tailgate release actuator (B).
3. Check the actuator by connecting battery power to the No. 2 terminal and ground to the No. 1 terminal. To prevent damage to the actuator, apply battery voltage only momentarily. The actuator should work.
4. If the actuator does not work, replace the tailgate latch assembly (see «TAILGATE LATCH REPLACEMENT»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#openers) ).

Scheme 58

Scheme 59

1. Remove the tailgate trim panel (see «TRIM REMOVAL/INSTALLATION - TAILGATE AREA»(/acura/mdx/ii-2006-2010/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-tailgate-area) ).
2. Disconnect the 3P connector (A) from the tailgate outer handle switch (B).
3. Check for continuity between the tailgate outer handle switch 3P connector No. 2 and No. 3 terminals. There should be continuity when the tailgate outer handle is pulled. There should be no continuity when the tailgate outer handle is released.
4. If the continuity is not as specified, remove the two bolts and the tailgate outer handle switch (A).
5. Install the switch in the reverse order of removal.

Transmitter Test/Replacement

Note. 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 any door is open, you cannot lock the doors with the transmitter. If you unlocked the doors with the transmitter, but do not open any of the doors within 30,60, or 90 seconds, the doors relock automatically. The lock or unlock does not work with the transmitter if the ignition key is inserted in the ignition switch.

Scheme 60

Scheme 61

1. Press the lock or unlock button five or six times to reset the transmitter. If the locks work, the transmitter is OK. If any of the transmitter buttons does not work, replace the transmitter, then register the transmitter (see «IMMOBILIZER KEY REGISTRATION»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#immobilizer-system__immobilizer-key-registration) ). If the locks don't work, go to step 2.
2. Connect the HDS to the data link connector.
3. Select KEYLESS from the BODY ELECTRICAL menu, then enter the KEYLESS CHECK.
4. Press lock, unlock, trunk, or panic button and check the response on the screen of the HDS. NOTE: The door lock actuators may or may not cycle when receiving input from the transmitter. If KEYLESS ENTRY TRANSMITTER CODE IS RECEIVED is indicated, the transmitter is OK. If DIFFERENT KEYLESS ENTRY TRANSMITTER CODE IS RECEIVED is indicated, the transmitter is not registered to the vehicle, if necessary, manually reprogram the transmitter (see «IMMOBILIZER KEY REGISTRATION»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#immobilizer-system__immobilizer-key-registration) ). If KEYLESS ENTRY TRANSMITTER CODE IS NOT RECEIVED is indicated, go to step 5.
5. Remove the transmitter cover (A) from the transmitter (B), and check for water damage. If you find any water damage, replace the transmitter, then manually reprogram the transmitter (see «IMMOBILIZER KEY REGISTRATION»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#immobilizer-system__immobilizer-key-registration) ). If there is no water damage, go to step 6.
6. Replace the transmitter battery (A) with a new one, and press lock or unlock button and check the receive condition on the screen of the HDS. If KEYLESS ENTRY TRANSMITTER CODE IS RECEIVED is indicated, the transmitter is OK. If KEYLESS ENTRY TRANSMITTER CODE IS NOT RECEIVED is indicated, go to step 7.
7. Use a different known-good keyless transmitter assembly and repeat steps 3 and 4 . NOTE: The keyless transmitter does not need to be programmed to the vehicle for this test. If DIFFERENT KEYLESS ENTRY TRANSMITTER CODE IS RECEIVED is indicated, replace the keyless transmitter and manually reprogram the transmitter (see «IMMOBILIZER KEY REGISTRATION»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#immobilizer-system__immobilizer-key-registration) ). If KEYLESS ENTRY TRANSMITTER CODE IS NOT RECEIVED is indicated, the immobilizer-keyless control unit is faulty, replace it and do the immobilizer system registration (see «IMMOBILIZER KEY REGISTRATION»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#immobilizer-system__immobilizer-key-registration) ).

Scheme 62

Scheme 63

1. Start the engine. If the engine does not start, go to the immobilizer system troubleshooting (see «SYMPTOM TROUBLESHOOTING»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#immobilizer-system) ). If the engine starts, go to step 2.
2. 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 3.
3. Manually program the transmitter (see «IMMOBILIZER KEY REGISTRATION»(/acura/mdx/ii-2006-2010/remont/door-locks-anti-theft-systems/#immobilizer-system__immobilizer-key-registration) ). If the transmitter does not program, go to step 4.
4. Manually program a known-good transmitter. If you can program the transmitter, replace the original transmitter. If you can not program the transmitter, replace the original transmitter, go to step 5.
5. Remove the transmitter cover (A) from the transmitter (B), and check for water damage. If you find any water damage, replace the transmitter. If there is no water damage, go to step 6.
6. 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, the HDS will be required for further diagnosis.

See also:
• TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A
• SYMPTOM TROUBLESHOOTING INFORMATION
• TEST
• SYMPTOM TROUBLESHOOTING INDEX
• TRIM REMOVAL/INSTALLATION - DOOR AREAS
• TRIM REMOVAL/INSTALLATION - REAR SIDE AREA
• FRONT DOOR PANEL REMOVAL/INSTALLATION
• REMOVAL AND INSTALLATION
• FRONT DOOR OUTER HANDLE REPLACEMENT
• HOOD LATCH REPLACEMENT
• REAR BUMPER REMOVAL/INSTALLATION
• TRIM REMOVAL/INSTALLATION - TAILGATE AREA
• IMMOBILIZER KEY REGISTRATION
• DOOR KEY CYLINDER SWITCH TEST
• CONTROL UNIT INPUT TEST
• KEYLESS OPERATION DOES NOT WORK (LOCK, UNLOCK, PANIC)
• DOORS WILL NOT UNLOCK (OR LOCK) WITH THE TRANSMITTER, BUT WILL UNLOCK (LOCK) WITH THE DOOR SWITCH
• DOORS AUTOMATICALLY RELOCK 30,60, OR 90 SECONDS AFTER BEING UNLOCKED WITH THE TRANSMITTER EVEN THOUGH A DOOR HAS BEEN OPENED
• THE HORN DOES NOT SOUND AND/OR THE HEADLIGHTS DO NOT FLASH WHEN THE PANIC BUTTON ON THE TRANSMITTER IS PRESSED
• TRANSMITTER TEST/REPLACEMENT