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Pinpoint Test C: No Power In Run

WARNING: This page is about a different car, the 2012 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
  1. C1 REVIEW THE BCM DTCs 
    • Review the BCM DTCs retrieved during inspection and verification.
    • Is DTC B1310:14 present? 
  2. C2 CHECK FOR RUN VOLTAGE AT THE BCM 
    • Ignition OFF.
    • Disconnect: BCM C2280B.
    • Ignition ON.
    • Measure the voltage between BCM C2280B-29, circuit CDC34 (WH/OG), harness side and ground.
      Fig 1: Measuring Voltage Between BCM C2280B-29, Circuit CDC34 (WH/OG), Harness Side And Ground
      G07397722Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
      • Yes  : GO to  C4.
      • No  : GO to C3.
  3. C3 CHECK THE IGNITION RUN CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: Ignition Switch C250.
    • Measure the resistance between BCM C2280B-29, circuit CDC34 (WH/OG), harness side and ignition switch C250-1, circuit CDC34 (WH/OG), harness side.
      Fig 2: Measuring Resistance Between BCM C2280B-29, Circuit CDC34 (WH/OG) And Ignition Switch C250-1, Circuit CDC34 (WH/OG)
      G07397723Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      • Yes  : INSTALL a new ignition switch. REFER to IGNITION SWITCH  . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
      • No  : REPAIR open circuit CDC34 (WH/OG). TEST the system for normal operation.
  4. C4 CHECK THE RUN/START RELAY 
    • Ignition OFF.
    • Disconnect: Run/Start Relay.
    • Carry out the appropriate relay component test. Refer to OEM WIRING DIAGRAMS for component testing.
    • Is the relay OK? 
      • Yes  : GO to C5.
      • No  : INSTALL a new run/start relay. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. C5 CHECK THE VOLTAGE TO THE RUN/START RELAY COIL 
    • Measure the voltage between run/start relay cavity 1, circuit SBB31 (WH/RD) and ground.
      Fig 3: Measuring Voltage Between Run/Start Relay Cavity 1, Circuit SBB31 (WH/RD) And Ground
      G07397724Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts? 
      • Yes  : GO to C6.
      • No  : VERIFY BJB fuse 31 (15A) is OK. If OK, REPAIR circuit SBB31 (WH/RD). If not OK, REFER to the Wiring Diagrams information to identify the possible cause of the circuit short. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  6. C6 CHECK THE RUN/START RELAY CONTROL CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • Disconnect: Run/Start Relay (if not previously disconnected).
    • Disconnect: BCM C2280F.
    • Measure the resistance between run/start relay cavity 2, circuit CDC55 (BN/VT) and BCM C2280F-18, circuit CDC55 (BN/VT), harness side.
      Fig 4: Measuring Resistance Between Run/Start Relay Cavity 2, Circuit CDC55 (BN/VT) And BCM C2280F-18, Circuit CDC55 (BN/VT)
      G07397725Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
      • Yes  : GO to C7.
      • No  : REPAIR circuit CDC55 (BN/VT) for an open. CARRY OUT a self-test (required to clear certain DTCs). CORRECT any unresolved DTCs. CLEAR all DTCs. TEST the system for normal operation.
  7. C7 CHECK THE RUN/START RELAY CONTROL CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between BCM C2280F-18, circuit CDC55 (BN/VT), harness side and ground.
      Fig 5: Measuring Resistance Between BCM C2280F-18, Circuit CDC55 (BN/VT), Harness Side And Ground
      G07397726Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10, 000 ohms? 
      • Yes  : GO to C8.
      • No  : REPAIR circuit CDC55 (BN/VT) for short to ground. CARRY OUT a self-test (required to clear certain DTCs). CORRECT any unresolved DTCs. CLEAR all DTCs. TEST the system for normal operation.
  8. C8 CHECK FOR CORRECT BCM OPERATION 
    • Check BCM C2280B and C2280F for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect: BCM C2280B.
    • Connect: BCM C2280F.
    • Connect: Run/Start Relay.
    • Make sure the connectors are seated correctly, then carry out a BCM self-test.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
      • Yes  : INSTALL a new BCM. REFER to MULTIFUNCTION ELECTRONIC MODULES . 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. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
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