2010 BMW 128i Convertible (E88) L6-3.0L (N52K) P Code Charts
none
P0703
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:
189
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
1. Check to determine whether foreign matter or objects
(dirt) are causing the switch to hang.
2. Electrical check on wire
a. –> If not OK, repair wire.
b. –> If OK, replace switch.
3. 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
