Automatic door-lock/unlock
CX-9 /2007 Version 1.0
Page 13
9.
Diagnose errors
Step 1: If door-locks are activated either during power-on or power-off, it means that relay-A is
activating or de-activating before Relay-C can prevent a door-lock signal to be sent.
a.
Check that relay-C is activated and de-activated after ~3 seconds at power-on or Power-
off. If NOT.
i.
Check the components are correct and correctly connected.
ii.
Check your circuit (Maybe capacitor C1 is defect or wrongly connected (watch
the polarization of the capacitors!)
b.
If Relay-C does activate and de-activate (as check in step 1.a),
i.
Check that contact-A is correctly connected with contact-B to prevent door-lock
signal at power-on/off.
ii.
Check that the circuit around Relay- , especially C3 is correctly connected
iii.
Otherwise try to increase the C3 value, e.g. double to 200uF. This will increase
the time for activation/de-activation of Relay-A. The relay-C might be slow. C3
should NOT be more 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 clicking sound from the door-locks when move the parking-brake between
pressed and released;
o
Check that the doors lock/unlock with the manually. If NOT :
Check the fuse D/L : 25A in the engine area is not broken (see owner’s manual)
o
Check that you have 12V power on the relay circuit with a meter. If no power :
Make sure the ignition switch is in the correct position (ON)
Check the red and black wire connections
Check fuse 4 (Meter 10A) in the glove fuse box is not broken. (see owner’s
manual)
o
Check that parking brake-switch activator is correctly working:
With the ignition switch in ON the red brake-light on the dashboard should
switch on/off with the parking brake between released and pressed. Make sure
it is fully released and pressed!
Check that the white wire is correctly connection to the green
Check that the white wire is connecting to ground (with an ohm-meter) when
the parking brake is pressed (on)
o
Check that the door-lock signal is correctly working :
