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Pinpoint Test At: DTC B2844

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. AT1 CHECK THE IC RUN/START VOLTAGE SUPPLY CIRCUIT FOR VOLTAGE WITH THE IGNITION SWITCH IN THE ACC POSITION 
    • Ignition OFF.
    • Disconnect: IC  C220.
    • Ignition In ACC.
    • Measure the voltage between the IC  C220-20, circuit CBP29 (WH/VT), harness side and ground.
      Fig 1: Measuring Voltage Between IC C220-20, Circuit CBP29 (WH/VT), Harness Side And Ground
      G06503553Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts with the ignition switch in the ACC position? 
  2. AT2 CHECK THE IC RUN/START VOLTAGE SUPPLY CIRCUIT FOR VOLTAGE WITH THE IGNITION SWITCH IN THE RUN OR START POSITION 
    • Disconnect: Starter Relay.
    • Place the key in the START position.
    • Measure the voltage between the IC  C220-20, circuit CBP29 (WH/VT), harness side and ground.
      Fig 2: Measuring Voltage Between IC C220-20, Circuit CBP29 (WH/VT), Harness Side And Ground
      G06503553Courtesy of FORD MOTOR CO.
    • Ignition OFF.
    • Measure the voltage between the IC  C220-20, circuit CBP29 (WH/VT), harness side and ground.
      Fig 3: Measuring Voltage Between IC C220-20, Circuit CBP29 (WH/VT), Harness Side And Ground
      G06503553Courtesy of FORD MOTOR CO.
    • Is the voltage greater than 10 volts with the ignition switch in the RUN and START positions, and does the voltage drop to 0 volts when the ignition switch is turned to the OFF position? 
  3. AT3 CHECK FOR CORRECT IC OPERATION 
    • Disconnect the IC  connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the IC  connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new IC  . REFER to INSTRUMENT CLUSTER (IC) . TEST the system for normal operation.
    • 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.
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