Faulty Signal
Faulty signal
Erasing diagnostic trouble codes (DTCs)
- Ignition on.
Erase diagnostic trouble codes (DTCs).
Select "Continue" when the diagnostic trouble codes (DTCs) have been erased.
Continue - Reading off diagnostic trouble codes (DTCs)
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Reading off diagnostic trouble codes (DTCs)
- Remove the key from the ignition switch.
- Ensure that all doors, the hood and the trunk lid are shut.
- Lock the car with the remote control.
- Wait approximately 10 seconds.
- Unlock the car with the remote control.
- Ignition on.
Read off diagnostic trouble codes (DTCs).
Does diagnostic trouble code (DTC) GLA-451 recur?
Yes - Checking the connectors
No - Intermittent fault
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Checking the connectors
- Ignition off.
- Expose the VGLA control module according to Replacing the control module Replacing the Control Module.
- Expose the movement sensor according to Replacing the movement sensor Service and Repair.
Check the movement sensor and the VGLA control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
- Ignition on.
Erase diagnostic trouble codes (DTCs).
Select "Continue" when the diagnostic trouble codes (DTCs) have been erased.
Continue - Reading off diagnostic trouble codes (DTCs)
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Reading off diagnostic trouble codes (DTCs)
- Remove the key from the ignition switch.
- Ensure that all doors, the hood and the trunk lid are shut.
- Lock the car with the remote control.
- Wait approximately 10 seconds.
- Unlock the car with the remote control.
- Ignition on.
Read off diagnostic trouble codes (DTCs).
Does diagnostic trouble code (DTC) GLA-451 recur?
Yes - Checking the wiring
No - FAULT FOUND
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Checking the wiring
- Ignition off.
Check the cable between control module terminal #A25 and movement sensor terminal #2 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check the cable between control module terminal #B17 and movement sensor terminal #3 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault , for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check the cable between mass movement sensor terminal #5 and ground for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.
Other information:
- For further information about signals and other values, see Signal specification, lock and alarm (VGLA) Signal Specification, Lock and Alarm (VGLA).
- To connect the breakout box, see Connecting the breakout box, lock and alarm (VGLA) Connecting the Breakout Box.
Was a fault found in the wiring?
Yes - Erasing diagnostic trouble codes (DTCs)
No - Replacing component
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Replacing component
Try a new movement sensor according to Replacing the movement sensor Service and Repair.
Continue - Erasing diagnostic trouble codes (DTCs)
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Erasing diagnostic trouble codes (DTCs)
- Ignition on.
Erase diagnostic trouble codes (DTCs).
Select "Continue" when the diagnostic trouble codes (DTCs) have been erased.
Continue - Verification
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Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Ignition off.
- Reinstall the connectors, components etc.
- Remove the key.
- Ensure that all doors, the hood and the trunk lid are shut.
- Lock the car with the remote control.
- Wait approximately 10 seconds.
- Unlock the car with the remote control.
- Ignition on.
Read off diagnostic trouble codes (DTCs).
Does diagnostic trouble code (DTC) GLA-451 recur?
Yes - No Fault Found Fault-tracing information
No - FAULT FOUND
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test - Erasing diagnostic trouble codes (DTCs)
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Intermittent fault
Check the cable between control module terminal #A25 and movement sensor terminal #2 for an intermittent short-circuit to ground according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults , for an intermittent short-circuit to supply voltage according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults. Check the cable between fuse 15 and ultrasonic sensor connector #6 for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults. Check the cable between ultrasonic sensor #7 and ground for an intermittent open-circuit according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Other information:
- For further information about signals and other values, see Signal specification, lock and alarm (VGLA) Signal Specification, Lock and Alarm (VGLA).
- To connect the breakout box, see Connecting the breakout box, lock and alarm (VGLA) Connecting the Breakout Box.
Continue - Fault-tracing information
No Fault Found
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Fault-tracing information
Information
Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).
Do you want to view the information again?
Yes - Attempt New Test
No - FAULT FOUND
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Attempt New Test - Erasing diagnostic trouble codes (DTCs)
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