Remote control unit not working - 2009 Chevrolet Optra 1.6

Here are the codes you posted along with the possible issues that may have caused each code to be triggered. It's possible the circuit these switches share has a problem that needs to be diagnosed.

It could well be a problem with the wiring or a problem with the connections between the switches and the Multiplex Control Unit, or possibly with the Multiplex Control Unit itself.

B1129

• Driver Side Door Lock Knob Switch Signal Error
• Faulty Driver Side Door Lock Knob Switch
• Driver Side Door Lock Knob Switch harness is open or shorted
• Driver Side Door Lock Knob Switch circuit poor electrical connection
• Faulty Door Multiplex Control Unit

B2077

• Right Power Sliding Door Remote Control Switch 1 Signal Error
• Faulty Right Power Sliding Door Remote Control Switch 1
• Right Power Sliding Door Remote Control Switch 1 harness is open or shorted
• Right Power Sliding Door Remote Control Switch 1 circuit poor electrical connection
• Faulty Right Power Sliding Door Control Unit

B2078

• Right Power Sliding Door Remote Control Switch 2 Signal Error
• Faulty Right Power Sliding Door Remote Control Switch 2
• Right Power Sliding Door Remote Control Switch 2 harness is open or shorted
• Right Power Sliding Door Remote Control Switch 2 circuit poor electrical connection Faulty Right Power Sliding Door Control Unit

B2079

• Right Power Sliding Door Remote Control Switch 3 Signal Error
• Faulty Right Power Sliding Door Remote Control Switch 3
• Right Power Sliding Door Remote Control Switch 3 harness is open or shorted
• Right Power Sliding Door Remote Control Switch 3 circuit poor electrical connection
• Faulty Right Power Sliding Door Control Unit

Check if the batteries both are giving at least 1.5volts each. Clean the terminals of the remote control to secure proper contact with the batteries. Check if the negative terminal of the remote have enough pressure to keep the batteries firmly inside the remote control. Point the remote to the sensor of your air conditioner and press the power button. Changing direction of the remote control pointing to the air conditioner while pressing power button. If still air conditioner does not work clean the sensor eye to remove dust and switch again the unit.

It could be many reason for remote is not working ,check the battery with replacing it with fresh new one , check the antenna for remote receiver and then check the connectors to remote receiver control unit under driver sit for loos connection ,if all seems ok you might replace unit

Have you tried replacing the fuse?

Have you checked the fuse on the remote control unit or the ground wire

Hi steve
make sure the two remotes that you have, have a good battery
and do this procedure, you will be OK
Good luck

if all other doors work the door lock actuator needs replaced most likely. if door switch works the same. if not then it could be a bigger problem in the circuit or remote control module. use a meter to test for signal to lock actuator. if no signal then ck control unit. if signal replace lock actuator.

If you have the battery of the remote control changed, and still not working, check on the transceiver unit inside the car.

The door lock/unlock input from the driver's key switch goes to the Door Multiplex control unit (main switch), the Door multiplex control unit then sends a signal on the BUS (CAN) circuit to the passenger's multiplex control unit; the passenger's multiplex control unit then controls all the door locks. The passenger's door lock key switch inputs to the passenger's multiplex control unit, if the locks work from the passenger's side key switch but not the driver's side key switch, the most likely cause is the driver's multiplex control unit (main switch) not sending the signal to the passenger's side multiplex control unit. This could also be the drivers side door lock actuator. Hope this helps!

try reprograming the remote, if that doesn't work u may need a new remote these are the factory instructions.
1. Switch ignition on with a key (don’t start the engine!); leave key in the ignition.
2. Mechanically lock vehicle at left front door, using second key.
3. On remote unit, press "Open" button once. A short horn signal will sound.
he "Open" button is pressed once for programming the first, or a single,
remote unit.
�� When programming additional remote units for the second, third or fourth
memory addresses, press the "Open" button two, three or four times, in
one-second intervals.
�� Example: press the "Open" button once, wait 1 second, then press once
again to program the second remote unit.
�� After 6 seconds, press "Open" button once to activate the coding ocess.

4. The remote unit will now be coded, and it can be used to unlock the central
locking system. Switch ignition off.

The key must be removed from the ignition before the remote unit can be used to lock
the vehicle.The coding process can be repeated up to 4 times for additional remote units.
In between each remote unit coding, the ignition must be switched off.