2F64 - P0703

2020 BMW 128i Coupe (E82) L6-3.0L (N51) Diagnostic Trouble Codes ( DTC ): Service instruction

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2F64

2F64 - P0703

Information saved in

DME

Fault code

2F64 - P0703

Fault text

Brake-light test switch, plausibility

Fault description

Brake Switch 'B' Circuit

Condition for fault identification

Test condition:

Brake light switch monitor Depress brake pedal repeatedly

Terminal condition: Terminal 15 ON Voltage condition:

Voltage in onboard electrical system > 10 V

Condition for fault memory entry

If the BLS is still OK, the fault will be stored immediately as soon as the brake pedal is depressed. If the plug is disconnected the BLS fault will be registered after approximately 40 sec.

Action in service

Check to determine whether foreign matter or objects (dirt) are causing the switch to hang.

Electrical check on wire

--> If not OK, repair wire.

--> If OK, replace switch.

Check by depresssing the brake pedal repeatedly. No fault should be stored.

Fault effect and breakdown warning

Driver information

Warning light:

If the switch is defective the cruise control or ACC will be deactivated.

Display:

Defective speed control or distance control failure