Symptoms - remote lock control system
Important: The following steps must be completed before using the symptom tables.
There are no fault codes.
The controllers can communicate over a serial line.
View system operation to familiarize yourself with the functions of the system. See section "Description and operation of the remote lock control system".
Visual inspection / physical control
- Inspect aftermarket equipment that may affect the operation of the remote lock system.
- Inspect easily accessible and visible parts of the system for obvious signs of damage or conditions that could lead to a malfunction.
Intermittent fault
Faulty electrical connections or wiring can cause intermittent faults. See section 9A, "Checking body wiring systems for intermittent faults and contact problems".
Alarm mode not working
Step | Operation | Values | Yes | No |
1 |
Has the vehicle system diagnostic check been completed?
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-
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Go to Step 2
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Check the vehicle with a diagnostic tool.
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2 |
Try to activate the alarm function using the lock remote control.
Does the horn sound intermittently and do the headlights flash?
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-
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Go to Step 3
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|
3 |
Are any of the alarm functions working?
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-
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Go to Step 4
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Go to section "Remote lock system not working".
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4 |
Are the headlights flashing?
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-
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Remote lock system not working
Step | Operation | Values | Yes | No |
1 |
Has the vehicle system diagnostic check been completed?
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-
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Go to Step 2
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Check the vehicle with a diagnostic tool.
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2 |
Press each button on the remote control in turn.
Is the system working properly?
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-
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Go to Step 3
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|
3 |
Lock and unlock the doors using the controls inside the vehicle.
Are the locks working properly?
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-
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Go to Step 4
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Jump to Section 9P "Doors, diagnostics".
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4 |
Test the operation of the rear compartment door release using the controls inside the vehicle.
Does the rear compartment door release work properly?
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-
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Go to Step 5
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Jump to Section 9S, Rear Body, Diagnosis".
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5 |
Check the operation of the remote control in the area of the car.
Are all remote lock functions working properly?
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-
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Go to Step 19
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Go to Step 6
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6 |
Important: All remote controls that need to be recognized by the remote door lock receiver (RCDLR), must be programmed in the same programming sequence. If the system is switched to programming mode, it will delete all previously programmed remotes upon receiving a programming signal from the first remote. Carry out the programming procedure. See section "Remote control programming".
Did you hear the body controller beep (BCM), confirming the completion of the programming of the control panels?
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-
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Go to Step 19
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Go to Step 7
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7 |
Does the control lamp light up?
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-
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Go to Step 8
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Go to Step 15
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8 |
Connect a test lamp between the battery positive voltage circuit on the RCDLR and the ground circuit on the RCDLR.
Does the control lamp light up?
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-
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Go to Step 9
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Go to Step 16
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9 |
Does the multimeter show the specified value?
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B+
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Go to Step 10
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Go to Step 11
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10 |
Does the control lamp light up?
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-
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Go to Step 13
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Go to Step 14
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11 |
Check the serial data link circuit of the remote keyless entry system for the following faults:
Has the cause been found and fixed?
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-
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Go to Step 19
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Go to Step 12
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12 |
Check for a poor connection in the harness connector of the RCDLR unit.
Has the cause been found and fixed?
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-
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Go to Step 19
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Go to Step 17
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13 |
Repair the short to voltage in the serial data line circuit of the keyless entry system.
Has the repair been completed?
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-
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Go to Step 19
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Go to Step 17
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14 |
Check for a poor connection at the body controller harness connector.
Has the cause been found and fixed?
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-
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Go to Step 19
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Go to Step 18
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15 |
Repair the open, high resistance, or short to ground in the battery positive voltage circuit of the RCDLR.
Has the repair been completed?
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-
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Go to Step 19
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-
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16 |
Repair the open or high resistance in the ground circuit of the RCDLR.
Has the repair been completed?
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-
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Go to Step 19
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-
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17 |
Important: Follow the remote keyless entry programming procedure when replacing the RCDLR receiver. Replace RCDLR receiver.
Has the replacement been completed?
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-
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Go to Step 19
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-
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18 |
Important: Perform the BCM programming procedure when replacing the BCM. Replace BCM. See Section 9V, "body controller".
Has the replacement been completed?
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-
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Go to Step 19
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-
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19 |
Operate the system to check if the problem has been fixed.
Has the cause been removed?
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-
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System OK
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Go to Step 3
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An internal fault is detected inside the controller. External circuits are not affected.
The controller executes an internal fault detection routine upon receiving a power-on command. The only necessary condition is the presence of supply voltage and ground. This program is executed even if the voltage is outside the allowed operating range.
An internal fault has been detected in the controller.
The controller disables all auxiliary inputs.
The current fault code is cleared after the fault disappears.
The DTC is cleared from the log when the ignition cycle counter in the controller reaches the reset threshold of 50 without recurring the fault.
If this DTC is received as current, replace the controller that generated this DTC.
Perform a post-repair diagnostic test when the repair is complete. See Section 9A, "Body Wiring Systems". See also section "Replacing, configuring and programming the associated controller and the controller with a communication failure".
DTC B3105 is set if the remote door lock receiver (RCDLR) I didn't remember a single key fob.
Remote function activation system (RFA) must be enabled and a check must be performed every time the key is changed.
This code is issued if the RCDLR receiver does not have stored key fobs.
The RFA system is faulty.
The DTC clears as current when at least one key fob is programmed into the RCDLR receiver.
Perform a post-repair diagnostic check after completing the diagnostic procedure. See Section 9A, "Body Wiring Systems".
This DTC is set if the key fob programmed in location 1 has a low battery.
Remote function activation system (RFA) must be enabled.
This code is issued after 3 consecutive low battery signals from the same programmed remote control.
The RFA system is faulty.
The code is cleared as current when a normal remote voltage signal is received from any of the programmed remote controls.
Perform a post-repair diagnostic check after completing the diagnostic procedure. See Section 9A, "Body Wiring Systems".
This DTC is set if the key fob programmed in location 2 has a low battery.
Remote function activation system (RFA) must be enabled.
This code is issued after 3 consecutive low battery signals from the same programmed remote control.
The RFA system is faulty.
The code is cleared as current when a normal remote voltage signal is received from any of the programmed remote controls.
Perform a post-repair diagnostic check after completing the diagnostic procedure. See Section 9A, "Body Wiring Systems".
This DTC is set if the key fob programmed in location 3 has a low battery.
Remote function activation system (RFA) must be enabled.
This code is issued after 3 consecutive low battery signals from the same programmed remote control.
The RFA system is faulty.
The code is cleared as current when a normal remote voltage signal is received from any of the programmed remote controls.
Perform a post-repair diagnostic check after completing the diagnostic procedure. See Section 9A, "Body Wiring Systems".
This DTC is set if the key fob programmed in location 4 has a low battery.
Remote function activation system (RFA) must be enabled.
This code is issued after 3 consecutive low battery signals from the same programmed remote control.
The RFA system is faulty.
The code is cleared as current when a normal remote voltage signal is received from any of the programmed remote controls.
Controllers connected to the high and low speed GMLAN serial links monitor serial communications during normal vehicle operation. Between the controllers there is an exchange of operational information and commands. The controllers have pre-recorded information about what messages should be exchanged over the serial links in each virtual network. These messages are monitored and in addition certain regular messages are used by the receiving controller to determine the availability of the sending controller. Each message contains the identification number of the transmitting controller.
body controller (BCM) activates the serial line enable and auxiliary wake-up circuits for the serial line by applying voltage when the ignition switch is in the ACC, ON, or START position.
The voltage in the system is 9 - 16 V.
Serial communication is required for the vehicle power mode master to operate.
A monitored regular message indicating the availability of the transmitting controller was not received.
The controllers have never signaled, so certain subsystems will not work.
The current fault code is cleared after the fault disappears.
The DTC is cleared from the log when the ignition cycle counter in the controller reaches the reset threshold of 50 without recurring the fault.
Using the above list of DTC definitions, determine which of the controllers is out of communication.
If there are multiple non-communicating modules, select the one closest to the DLC slot.
Some modules may not have internal protection for some of the outputs, which may cause the battery positive voltage fuse or the ignition voltage fuse to blow. If the input voltage fuse is blown but no short circuit is detected on this circuit, verify that the controllers do not have a voltage output circuit shorted to ground before replacing the controller.
This diagnostic can be applied to any controller that needs to communicate over a high or low speed GMLAN serial link, provided the vehicle is equipped with the option that uses this controller.
Perform a post-repair diagnostic check after completing the diagnostic procedure. Section 9A "Body Wiring System". See also section "Replacing, configuring and programming the associated controller and the controller with a communication failure".
Controllers connected to the high and low speed GMLAN serial links monitor serial communications during normal vehicle operation. Between the controllers there is an exchange of operational information and commands. The controllers have pre-recorded information about what messages should be exchanged over the serial links in each virtual network. These messages are monitored and in addition certain regular messages are used by the receiving controller to determine the availability of the sending controller. Each message contains the identification number of the transmitting controller.
body controller (BCM) activates the serial line enable and auxiliary wake-up circuits for the serial line by applying voltage when the ignition switch is in the ACC, ON, or START position.
The ignition switch is set to the ON position.
The RCDLR has not been subjected to the tire type selection and tire pressure tuning procedure.
Driver Information Center (DIC) displays warning message SERVICE TIRE MONITOR (TIRE MONITORING SERVICE).
The current DTC will be cleared after the RCDLR goes through the setup procedure.
A freshly replaced RCDLR will result in DTC C0569 on the first ignition cycle. It is necessary to perform the tire type selection and tire pressure setting procedure. See repair manual.