Pinpoint Test H: DTC P0833 - Clutch Pedal Switch B Circuit - Diesel

WARNING: This page is about a different car, the 2006 Ford Pickup, 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

H1 CHECK THE CPP SWITCH
- Key in OFF position.
- Disconnect: PCM C1381a.
- While pressing and releasing the clutch pedal, measure the voltage between the PCM C1381a-36, circuit 306 (TN/LB), harness side and ground.
  
  Fig 1: Checking CPP Switch
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts with the clutch pedal released, and less than 1 volt with the clutch pedal pressed?
Yes : Go to H5.

No : Go to H2.
H2 CHECK CIRCUIT 306 (TN/LB) FOR A SHORT TO VOLTAGE
- Disconnect: CPP Switch C257.
- Measure the voltage between the PCM C1318a-36, circuit 306 (TN/LB), harness side and ground.
  
  Fig 2: Checking Circuit 306 (TN/LB) For Short To Voltage
  Courtesy of FORD MOTOR CO.
- Is any voltage present?
Yes : REPAIR the circuit. TEST the system for normal operation.

No : Go to H3.
H3 CHECK CIRCUIT 306 (TN/LB) FOR AN OPEN
- Disconnect: CPP Switch C257.
- Measure the resistance between the PCM C1381a-36, circuit 306 (TN/LB), harness side and the CPP switch C257-4, circuit 306 (TN/LB), harness side.
  
  Fig 3: Checking Circuit 306 (TN/LB) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : Go to H4.

No : REPAIR the circuit. TEST the system for normal operation.
H4 CHECK CIRCUIT 640 (RD/YE) FOR AN OPEN
- Measure the voltage between the CPP switch C257-3, circuit 640 (RD/YE), harness side and ground.
  
  Fig 4: Checking Circuit 640 (RD/YE) For Open
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : INSTALL a new CPP switch. TEST the system for normal operation.

No : VERIFY the central junction box (CJB) fuse 45 (10A) is OK. If OK, REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
H5 CHECK FOR CORRECT PCM OPERATION
- Disconnect all the PCM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the PCM connectors and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - GASOLINE ENGINES . CLEAR the DTCs. REPEAT the self-test.

No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.