How to replace the door lock relay on Honda CRV 2005

Question

I have a Honda CRV 2005 with the driver door power lock not working.

Here are the symptoms:

1. Power lock driver side doesn't work, but all other doors work fine,
2. I can lock and unlock the driver door manually with the key,
3. but can't unluck it either with the door switch or the keyless button,
4. If I power lock the car with the key (or the driver switch), all doors lock but the driver's door.
5. Everytime I do so, I hear a clicking noise in the fuse panel under the driving wheel.

I have check online and found that most of the time, it's the actuator that is faulty. I've then bought a new one, replaced it, but it didn't help. I've then tested both my old and new actuator on an other door and they both work find. So my problem isn't the actuator. More search online led to a door lock relay problem. I would like to test that, but I can't find anywhere information on are to change it and what part is necessary.

I've found the fuse and relay diagram online (http://fusesdiagram.com/honda/fuses-and-relay-honda-cr-v-2002-2006.html) but can figure what relay controls the door locks.

So the summary of my question:

1. Where is the door lock relay on a Honda CRV 2005?
2. How do I replace it and what part is needed?
3. Will I have to reprogram my keys after doing so and if yes, is it easy?

Thanks

Answer 1

The door lock/unlock relays are built into the multiplex unit on that year CR-V and are not serviceable (See Figs. 1 & 2). To replace it you'd either have to replace the whole multiplex unit or crack it open, trace out the board and solder in a new relay.

To test the relay you would have to gain access to the back of the multiplex unit connector M (22 in Fig 2). On a lock command the driver door lock relay powers terminal 9 and there should be a ground on terminal 7. And the other way around on an unlock command.

Since you already replaced the driver door lock actuator I'd suggest you take a look at the wiring. A common failure point is in the rubber sleeve that goes from the interior to the door.

Fig 1.

Fig 2.

Socket Ref Terminal Connects to

A 2 5 Dashboard wire harness B (see DASHBOARD WIRE HARNESS B )
B 3 6 Dashboard wire harness B (see DASHBOARD WIRE HARNESS B )
C 1 14 Dashboard wire harness B (see DASHBOARD WIRE HARNESS B )
D 4 12 ECM/PCM wire harness (see ECM/PCM WIRE HARNESS )
E 5 13 ECM/PCM wire harness (see ECM/PCM WIRE HARNESS )
F 19 12 Engine compartment wire harness (see ENGINE COMPARTMENT WIRE HARNESS (DASH BRANCH) )
G 9 10 Engine compartment wire harness (see ENGINE COMPARTMENT WIRE HARNESS (DASH BRANCH) )
H 8 3 Engine compartment wire harness (see ENGINE COMPARTMENT WIRE HARNESS (DASH BRANCH) )
I 20 5 Engine compartment wire harness (see ENGINE COMPARTMENT WIRE HARNESS (DASH BRANCH) )
J 21 8 Engine compartment wire harness (see ENGINE COMPARTMENT WIRE HARNESS (DASH BRANCH) )
K 23 17 Dashboard wire harness A (see DASHBOARD WIRE HARNESS A (LEFT BRANCH) )
L 24 10 Dashboard wire harness A (see DASHBOARD WIRE HARNESS A (LEFT BRANCH) )
M 22 12 Dashboard wire harness A (see DASHBOARD WIRE HARNESS A (LEFT BRANCH) )
N 27 6 Dashboard wire harness A (see DASHBOARD WIRE HARNESS A (LEFT BRANCH) )
O 26 12 Dashboard wire harness A (see DASHBOARD WIRE HARNESS A (LEFT BRANCH) )
P 7 18 ECM/PCM wire harness (see ECM/PCM WIRE HARNESS )
Q 6 8 ECM/PCM wire harness (see ECM/PCM WIRE HARNESS )
R 10 6 ECM/PCM wire harness (see ECM/PCM WIRE HARNESS )
Power window relay 12 4
S 25 2 ECM/PCM wire harness (see ECM/PCM WIRE HARNESS )
Starter cut relay 14 4
T 18 3 Multiplex control inspection connector
Taillight relay 13 4
Turn signal/hazard relay 11 3
U 15 1 Optional connector
V 16 4 Optional connector
W (Memory erase signal (MES) connector) 17 2 ECM/PCM wire harness (see ECM/PCM WIRE HARNESS )
X 28 8 (Plugs directly into the multiplex control unit) Y 29 13 (Plugs directly into the multiplex control unit)

Answer 2

had the same problem it ended up being the connector on the motor