Pinpoint Test F: Flash Code 2 - Brake Pedal Position Switch Circuit Failure
- F1 CHECK STOPLAMP OPERATION
- Press and release the brake pedal while observing the stoplamps.
- Do the stoplamps operate correctly?
- F2 CHECK CIRCUIT 810 (RD/LG) FOR AN OPEN
- Key in OFF position.
- Disconnect: Speed Control Servo C122.
- Measure the voltage between the speed control servo C122 pin 4, circuit 810 (RD/LG), harness side and the speed control servo C122 pin 10, circuit 57 (BK), harness side; while pressing the brake pedal.
Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes
: GO to F3.
- No
: GO to F5.
- F3 CHECK THE BRAKE CIRCUIT
- Measure the resistance between the speed control servo C122 pin 4, circuit 810 (RD/LG), harness side and the speed control servo C122 pin 10, circuit 57 (BK) harness side.
Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes
: INSTALL a new speed control servo. REFER to SPEED CONTROL SERVO in this article. REPEAT the self-test.
- No
: GO to F4.
- F4 CHECK CIRCUIT 676 (PK/OG) FOR AN OPEN
- Disconnect: Brake Pedal Position (BPP) Switch C278.
- Measure the resistance between the BPP switch C278 pin 1, circuit 676 (PK/OG), harness side and ground.
Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes
: INSTALL a new BPP switch. REFER to EXTERIOR LIGHTING
. TEST the system for normal operation.
- No
: REPAIR the circuit. TEST the system for normal operation.
- F5 CHECK THE BRAKE PEDAL POSITION (BPP) SWITCH
- Remove the BPP switch. REFER to EXTERIOR LIGHTING
.
- Carry out the BPP switch component test. Refer to COMPONENT TEST in this article.
- Is the BPP switch OK?
- Yes
: REPAIR circuit 810 (RD/LG). TEST the system for normal operation.
- No
: INSTALL a new BPP switch. TEST the system for normal operation.