A0BF
HighA0BF — CAS: Terminal 15 Output, Output 2 Not Activating
Description
What the Code Means
A0BF is logged by the Car Access System (CAS) when the second Terminal 15 output fails — the circuit that supplies “ignition” power to the car's secondary systems. Like its sibling code A0BE, it means the CAS can't properly power one of the Terminal 15 lines, so systems the car needs to run stay dead.
Symptoms
Symptoms
Electrical and starting:
- ignition comes on, but some systems get no power;
- warning lights are on;
- the engine may not start.
Fault behavior:
- intermittent electrical faults.
Causes and fixes
Diagnosis and Repair
- Run diagnostics with ISTA and read the CAS circuit parameters.
- Check the CAS module and the wiring for Terminal 15 output 2 — circuit continuity, connector condition.
- Check the fuses and relays on this circuit.
- If the CAS module is faulty, replace it. OEM part number:
61356993373.
Possible secondary damage
Secondary Damage
- Communication with the DME may fail due to unstable power.
- Power supply problems can take out other control modules.
Don't put off diagnosis: intermittent power faults can kill several electronic modules at once.