Internal Battery Fault
Internal battery fault
Erasing diagnostic trouble codes (DTCs)
- Ignition for 30 seconds.
Erase DTCs.
Continue - Reading off diagnostic trouble codes (DTCs)
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Reading off diagnostic trouble codes (DTCs)
- Ignition on.
- Wait for 30 seconds.
- Ignition off, remove the key from the ignition switch and close all doors, the hood, trunk lid or tailgate.
- Lock the car with the remote control.
- Wait for approximately 30 seconds.
- Unlock the car with the remote control.
- Ignition on.
- Read off diagnostic trouble codes (DTCs).
Did diagnostic trouble code (DTC) GLA-312 recur?
Yes - Erasing diagnostic trouble codes (DTCs)
No - Intermittent fault
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Checking cables
- Expose VGLA control module according to Replacing main control module Replacing Main Control Module.
- Disconnect siren according to Replacing the siren Replacing the Siren.
- Disconnect siren connector.
- Ignition on.
Check fuse 29.
Check that the cable between #4 on 15-I rail in the relay box and the siren connector #1 for open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault and a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check siren and control module connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Other information:
- The voltage between siren connector #1 and ground should be battery voltage when the ignition is on.
Remedy as necessary.
Was a fault detected?
Yes - Erasing diagnostic trouble codes (DTCs)
No - Replacing component
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Replacing component
- Ignition off.
- Siren removed.
- Try a new battery.
- Ignition on.
- Erase DTCs.
Continue - Reading off diagnostic trouble codes (DTCs)
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Reading off diagnostic trouble codes (DTCs).
- Ignition on.
- Wait at least 1 minute.
- Ignition off, remove the key from the ignition switch and close all doors, the hood, trunk lid or tailgate.
- Lock the car with the remote control.
- Wait for approximately 10 seconds.
- Unlock the car with the remote control.
- Ignition on.
- Read off diagnostic trouble codes (DTCs).
Did diagnostic trouble code (DTC) GLA-312 recur?
Yes - Replacing component
No - FAULT FOUND
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Replacing component
Try a new siren according to Replacing the siren Replacing the Siren.
Continue - Erasing diagnostic trouble codes (DTCs)
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Erasing diagnostic trouble codes (DTCs)
- Ignition on.
Erase DTCs.
Continue - Verification
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Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows.
that the fault has been corrected as follows:
- Ignition on.
- Wait for approximately 1 minute.
- Ignition off.
- Remove the key from the ignition switch and close all doors, the hood, trunk lid or tailgate.
- Lock the car with the remote control.
- Wait approximately 10 seconds.
- Unlock the car with the remote control.
- Read off diagnostic trouble codes (DTCs).
Does diagnostic trouble code (DTC) GLA-321 recur?
Yes - Fault-tracing information
No - FAULT FOUND
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Fault-tracing information
Verification indicates that the fault persists.
Do you want to repeat fault-tracing?
No - No Fault Found
Yes - Checking cables
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Intermittent fault
- Check siren and VGLA control module connectors for loose connections according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults and contact resistance and oxidation according to Checking wiring and terminals. Intermittent faults Checking Wiring and Terminals. Intermittent Faults.
Continue - Fault-tracing information
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Fault-tracing information
If the fault is intermittent do not verify fault-tracing if the fault does not recur.
as long as the fault does not appear.
Do you want to repeat fault-tracing?
No - No Fault Found
Yes - Erasing diagnostic trouble codes (DTCs)
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