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Pinpoint Test A: The Powertrain Control Module (Pcm) Does Not Respond To The Scan Tool

WARNING: This page is about a different car, the 2013 Ford Focus and 2012 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Failure to disconnect the battery when instructed will result in false resistance readings.
  1. A1 VERIFY WHETHER OTHER HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) MODULES PASS THE NETWORK TEST 
    • Using a scan tool, perform the network test.

    Is the text "pass" or a DTC listed next to any of the following modules (if equipped): APIM, ABS module, BCM, OCSM, Parking Aid Module (PAM), PSCM, RCM, SASM or TCM? 

    1. Yes:  If "pass" or a DTC was listed next to the Powertrain Control Module (PCM), a network fault is not currently present. To diagnose an intermittent High Speed Controller Area Network (HS-CAN) fault condition, GO to Pinpoint Test W 

      If "pass" or a DTC was listed next to one or more modules other than the PCM, GO to A2

    2. No:  No modules are currently communicating on the High Speed Controller Area Network (HS-CAN). GO to Pinpoint Test W 
  2. A2 PINPOINT TEST QA VERIFICATION CHECK 

    Has the VREF test been performed? 

    1. Yes:  GO to A3
    2. No:  Go to A2.
  3. A3 CHECK THE HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) TERMINATION RESISTANCE 
    • Ignition OFF.
    • Measure:

    Click to display connectors

    Positive Lead Measurement / Action Negative Lead
    C251-6 Ω C251-14

    Is the resistance between 54 and 66 ohms? 

    1. Yes:  GO to  A5
    2. No:  GO to A4
  4. A4 CHECK THE HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) CIRCUITS BETWEEN THE PCM (POWERTRAIN CONTROL MODULE) AND THE DLC (DATA LINK CONNECTOR) FOR AN OPEN 
    • Disconnect: PCM C175B.
    • Measure:

    Click to display connectors

    Positive Lead Measurement / Action Negative Lead
    C175B-54 Ω C251-6
    C175B-41 Ω C251-14

    Are the resistances less than 3 ohms? 

    1. Yes:  GO to A5
    2. No:  REPAIR the circuit in question.
  5. A5 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION 
    • Ignition OFF.
    • Disconnect and inspect all the PCM connectors.
    • Repair:
      • corrosion (install new connector or terminals - clean module pins)
      • damaged or bent pins - install new terminals/pins
      • pushed-out pins - install new pins as necessary
    • Reconnect the PCM connectors. Make sure they seat and latch correctly.
    • Operate the system and determine if the concern is still present.

    Is the concern still present? 

    1. Yes:  CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new PCM.

      REFER to: POWERTRAIN CONTROL MODULE (PCM) .

    2. No:  The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
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