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Automatic door-lock/unlock  

CX-9 /2007    Version 1.0 

Page 14 

 

 

Check that the grey wire is correctly connected to black/violet wire 

 

When you connect the grey wire to ground with a test wire, the doors should 
lock. 

 

2.

 

If you

 hear

 the door-locks do make a clicking sound when move the parking-brake between 

pressed and released, it could mean they are activated but either: 
 

o

 

Check whether you can lock/unlock manual. If 

NOT

 

One of the doors is still open. Check the doors and your internal lights; if they 
are on, a door is still open. 

 

Pulse Relay-B might be in constant on. Check whether Relay-B is only one during 
the pulse for ~1.5 seconds.  

 

Disconnect grey wire and see whether manual switch now works, if so: 

o

 

Check your circuit (Maybe capacitor C2 is defect or wrongly 
connected (watch the polarization of the capacitors !) 

 

o

 

Maybe the door-locks try to unlock, instead of lock, or opposite. 

 

To check whether the door-locks try to LOCK instead of Unlock, unlock the doors 
manual and repeat the test step B. If the doors now lock, you have reversed the 
resistor R2 connection on the relay.  (we are only human) 
 

o

 

Don’t hold the UNLOCK door switch pressed at the same time as pressing and releasing 
the parking-brake. It would harm, but it does not help either. 
 

o

 

Test whether grey wire is correctly connected. 

 

With a test wire connect grey wire to ground. Door should UNLOCK. 

 

With a test wire connect grey wire to resistor of 1K (1000 Ohm) and connect 
other side of resistor to ground. Door should LOCK. 
 

o

 

Disconnect grey wire from V/W wire and with an ohm meter check that the grey wire is 
NOT making connection constant to ground. With the ignition key in ON, wait 3 seconds,  
press and release parking brake couple of times.  You should see the meter do a short 

detection

 before showing open circuit again (detection is the right word, the needle will 

move only shortly) 

 

If either is not working remove the circuit (e.g. disconnect grey wire from V/W 
wire and double check you component connections.  

 

o

 

The pulse time is too short. Increase the value of capacitor C2, but don’t make it more 
than three-quarter the value of C1. If longer time is needed increase C1 value 
accordingly. (This step is very unusual to be needed, but MAYBE you are unlucky…) 

 

 

Содержание CX-9

Страница 1: ...d to find that there is NO automatic door lock I have searched Internet and many people had the same surprise It was confirmed by Mazda that the CX9 does not have automatic door lock either Time for a...

Страница 2: ...will built and install I wish you a TON of pleasure with the descriptions below I tried to be complete and as helpful as possible Take time to read the document maybe 2 times before you start It can...

Страница 3: ...spikes to the capacitor C3 Don t be a wise guy and a put a diode over the relay B and relay C the circuit will not work Pulse When contact C closes e g relay A is on because the parking brake is on r...

Страница 4: ...a door lock signal is sent to the contact D Contact D is in NO and the ground signal is sent directly to the car computer This indicates an unlock signal and the doors will unlock After 1 5 seconds th...

Страница 5: ...itor C1 will be discharged and relay C will activate Contact A is set to NO preventing a door lock signal to be sent to the contact D When relay A is dropping off it will activate relay B through cont...

Страница 6: ...once it is installed and wonder how you could have lived without it In case you want unlock sometimes but not all of the time you can consider an extra switch on the dashboard to allow unlock when yo...

Страница 7: ...ed With a little bit of patience and good looking checking it was an easy job in 1 hour and performed the in house test chapter 5 I used a battery charger for the 12V I have drilled a hole in the plas...

Страница 8: ...ted to the MIN o Take the Red wire from the 12V and hold to MIN to discharge Capacitors C1 o Locate Relay C and make sure you can see it well o Reconnect Red wire to 12V and watch relay C It should ac...

Страница 9: ...o times the capacitor C2 1000uF this should not be a problem but if you have old capacitors they tend to dry out and lose their power o Make sure black wire is connected to MIN o Make sure the white w...

Страница 10: ...precaution See Appendix C a Disconnection with clear radio channels and seat memory Remove the panels See Appendix C Appendix C shows the Body Control Module BCM It is located at the front behind the...

Страница 11: ...ated so far If that did happen however go to chapter 9 diagnose step 1 B Press and release the parking brake off to remove the parking brake The doors should lock If that does not happen go to chapter...

Страница 12: ...dashboard You will find a good place high up under the dashboard Also use tire wraps tie wire to make sure that the wires are secured and not in the way Replace the panels Appendix D Last but not lea...

Страница 13: ...e than half the value of C2 this is unusual action to take as the change is less than 0 001 that this is the cause but you never know Step 2 The doors won t lock or unlock 1 If you don t hear a clicki...

Страница 14: ...w lock you have reversed the resistor R2 connection on the relay we are only human o Don t hold the UNLOCK door switch pressed at the same time as pressing and releasing the parking brake It would har...

Страница 15: ...Power on off Reset Relay A Relay B Relay C Contact B Contact A Contact C Contact D NO NO NO NO C3 100uF 25V D2 1N4001 The circuit has 3 major parts build around 3 separate relays 1 Activator Triggere...

Страница 16: ...s good as well e g 6V 30V A 12V DPDT Relay Double Pole Double Throw relay B 12V SPDT Relay Single Pole Double Throw relay C 12V SPDT Relay Single Pole Double Throw relay Wire 0 75 mm2 18 Gauge Availab...

Страница 17: ...Automatic door lock unlock CX 9 2007 Version 1 0 Page 17 Appendix C Remove panels and dis connect battery...

Страница 18: ...CX 9 2007 Version 1 0 Page 18 BCM Reconnect the battery a Verify that all connections are secure b Turn the ignition switch to RUN position c Reconnect the negative battery cable d Turn the ignition...

Страница 19: ...Automatic door lock unlock CX 9 2007 Version 1 0 Page 19 Appendix D Re installing panels...

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