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Test Procedure

  1. BB1 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) 

    Are DTCs P0886, P0887, P2531, or P2533 present? 

    Yes No
    GO to BB2  . If sent to this test from Pinpoint Test BC, GO to BB2  .
    For C-MAX, GO to  BB3.
    For all others, GO to  BB5.
  2. BB2 CHECK THE BATTERY AND CHARGING SYSTEM 
    • Check the battery and charging system voltages. Refer to the appropriate article, Charging System.

    Are the battery and charging system voltages within specification? 

    Yes No
    For C-MAX, GO to BB3  .
    For all others, GO to  BB5.    		 REPAIR as necessary. REFER to the appropriate article, Charging System.
    Clear the SOBDMC DTCs. REPEAT the self-test.
  3. BB3 CHECK THE TCM POWER RELAY 
    • Carry out the TCM power relay component test. Refer to the appropriate article, Component Testing.

    Does the TCM power relay pass the component test? 

    Yes No
    GO to BB4  . INSTALL a new TCM Power relay. Clear the SOBDMC DTCs. REPEAT the self-test.
  4. BB4 CHECK THE VOLTAGE TO THE TCM POWER RELAY 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) TCM Power Relay Connector, Harness Side (-)
      B+ - Pin 1, 3 Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to BB5  . REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test.
  5. BB5 CHECK THE B+ CIRCUIT FOR VOLTAGE 
    • Ignition ON, engine OFF.
    • TCM-A connector disconnected.
    • Measure the voltage between:
      (+) TCM-A Connector, Harness Side (-)
      B+ - Pin 6 Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to BB6  . REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test.
  6. BB6 CHECK THE TCMRC CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • For C-MAX,
    • Measure the resistance between:
      (+) TCM Power Relay Connector, Harness Side (-) TCM-A Connector, Harness Side
      TCMRC - Pin 2 TCMRC - Pin 40
    • For all others,
    • BJB-B connector disconnected.
    • Measure the resistance between:
      (+) BJB-B Connector, Harness Side (-) TCM-A Connector, Harness Side
      TCMRC - Pin 39 TCMRC - Pin 40

    Is the resistance less than 5 ohms? 

    Yes No
    GO to BB7  . REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test.
  7. BB7 CHECK THE TCMRC CIRCUIT FOR A SHORT TO GROUND 
    • Measure the resistance between:
      (+) TCM-A Connector, Harness Side (-)
      TCMRC - Pin 40 Ground

    Is the resistance greater than 10K ohms? 

    Yes No
    GO to BB8  . REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test.
  8. BB8 CHECK THE TCMRC CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) TCM-A Connector, Harness Side (-)
      TCMRC - Pin 40 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test. GO to BB9  .
  9. BB9 CHECK FOR AN OPEN VPWR CIRCUIT 
    • Ignition OFF.
    • For C-MAX,
    • Measure the resistance between:
      (+) TCM Power Relay Connector, Harness Side (-) TCM-A Connector, Harness Side
      VPWR - Pin 5 VPWR - Pin 10, 9
    • For all others,
    • Measure the resistance between:
      (+) BJB-B Connector, Harness Side (-) TCM-A Connector, Harness Side
      VPWR - Pin 46 VPWR - Pin 10, 9

    Are the resistances less than 5 ohms? 

    Yes No
    GO to BB10  . REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test.
  10. BB10 CHECK THE TCM VPWR CIRCUIT FOR VOLTAGE 
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) TCM-A Connector, Harness Side (-)
      VPWR - Pin 29 Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to BB11  . REPAIR the open circuit. Clear the SOBDMC DTCs. REPEAT the self-test.
  11. BB11 CHECK THE TCM POWER RELAY VPWR CIRCUIT FOR A SHORT TO VOLTAGE 
    • Measure the voltage between:
      (+) TCM Power Relay Connector, Harness Side (-)
      VPWR - Pin 5 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test. GO to BB12  .
  12. BB12 CHECK THE TCM VPWR CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • BJB-B connector connected.
    • Measure the voltage between:
      (+) TCM-A Connector, Harness Side (-)
      VPWR - Pin 29 Ground

    Is any voltage present? 

    Yes No
    REPAIR the short circuit. Clear the SOBDMC DTCs. REPEAT the self-test. For C-MAX, GO to  BB14.
    For all others, GO to BB13  .
  13. BB13 CHECK THE VPWR CIRCUITS FOR VOLTAGE 
    • Ignition OFF.
    • BJB-B connector connected.
    • Connect a 5 amp fused jumper wire between the following:
      Point A TCM-A Connector, Harness Side Point B
      TCMRC - Pin 40 Ground
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) TCM-A Connector, Harness Side (-)
      VPWR - Pin 10, 9 Ground

    Is the voltage greater than 10.5 V? 

    Yes No
    GO to BB14  . INSTALL a new BJB.
    Clear the SOBDMC DTCs. REPEAT the self-test.
  14. BB14 CHECK FOR CORRECT TCM OPERATION 
    • Ignition OFF.
    • Disconnect all the TCM connectors.
    • Visually inspect for:
      • pushed out pins
      • corrosion
    • Connect all the TCM connectors and make sure they seat correctly.
    • Ignition ON, engine OFF.
    • Clear the SOBDMC DTCs.
    • Ignition OFF.
    • Allow the TCM to complete a normal power down sequence. Refer to HYBRID ELECTRIC CONTROL SOFTWARE , for additional information.
    • Ignition ON, engine OFF.
    • Carry out the SOBDMC self-test.
    • Verify the concern is still present.

    Is the concern still present? 

    Yes No
    INSTALL a new TCM.
    REFER to the appropriate article, Automatic Transmission. REFER to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the TRID Block for a Replacement TCM.    		 The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
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