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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1410 (Automatic Transmission - FNR5) >> Diagnostic Tests >> Pinpoint Tests - OSC Equipped Vehicle >> Pinpoint Tests >> Pinpoint Test I: TCM

Pinpoint Test I: TCM

WARNING: This page is about a different car, the 2009 Mercury Milan and 2009 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Refer to the Transmission Control Module (TCM) Connector illustration Transaxle Connector Layouts .
NOTE: Refer to the Transmission Control Module (TCM) Relay Connector illustration Transaxle Connector Layouts .
  1. I1 CHECK SJB Fuse 26 (7.5A) 
    • Key in OFF position.
    • Check fuse: Smart Junction Box (SJB) Fuse 26 (7.5A)
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I2.
    2. NO  : REPAIR circuit CBP18 (GY/OG) for a short to ground. TEST the system for normal operation.
  2. I2 CHECK CIRCUIT CBP18 (GY/OG) FOR AN OPEN 
    • Disconnect: SJB Fuse 26 (7.5A)
    • Disconnect: Transmission Control Module (TCM) Relay
      • Fig 1: Checking Circuit CBP18 (GY/OG) For An Open
      GF0029746Courtesy of FORD MOTOR CO.
    • Measure the resistance between the output side of SJB fuse 26 (7.5A) and TCM relay pin 86, circuit CBP18 (GY/OG).
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I3.
    2. NO  : REPAIR circuit CBP18 (GY/OG) for an open. TEST the system for normal operation.
  3. I3 CHECK RE406 (GY/VT) FOR AN OPEN 
      Fig 2: Checking RE406 (GY/VT) For An Open
      GF0029747Courtesy of FORD MOTOR CO.
    • Measure the resistance between TCM relay pin 85, circuit RE406 (GY/VT) and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I6.
    2. NO  : Go to  I4.
  4. I4 CHECK THE TCM GROUND CIRCUIT 
    • Disconnect: TCM C2352B
      • Fig 3: Checking TCM Ground Circuit
      GF0029748Courtesy of FORD MOTOR CO.
    • Measure the resistance between TCM relay pin 85, circuit RE406 (GY/VT) and TCM C2353B-16, circuit RE406 (GY/VT).
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I5.
    2. NO  : REPAIR circuit RE406 (GY/VT) for an open. TEST the system for normal operation.
  5. I5 CHECK THE TCM GROUND SUPPLY CIRCUIT FOR AN OPEN 
    • Disconnect: TCM C2352A
      • Fig 4: Measuring Resistance Between TCM C2352A-1, Circuit GD120 (BK/GN) & Ground
      GF0041463Courtesy of FORD MOTOR CO.
    • Measure the resistance between TCM C2352A-1, circuit GD120 (BK/GN) and ground.
      • Fig 5: Measuring Resistance Between C2352A-9, Circuit GD120 (BK/GN) & Ground
      GF0041464Courtesy of FORD MOTOR CO.
    • Measure the resistance between C2352A-9, circuit GD120 (BK/GN) and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new TCM. TEST the system for normal operation.
    2. NO  : REPAIR circuit GD120 (BK/GN) for an open. TEST the system for normal operation.
  6. I6 CHECK BJB Fuse 16 (15A) 
    • Check fuse: Battery Junction Box (BJB) Fuse 16 (15A)
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I8.
    2. NO  : Go to  I7.
  7. I7 CHECK CIRCUIT SBB16 (VT/RD) FOR A SHORT TO GROUND 
    • Disconnect: BJB Fuse 16 (15A)
      • Fig 6: Checking Circuit SBB16 (VT/RD) For A Short To Ground
      GF0029750Courtesy of FORD MOTOR CO.
    • Measure the resistance between the output side of BJB fuse 16 (15A), circuit SBB16 (VT/RD) and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  I9.
    2. NO  : REPAIR circuit SBB16 (VT/RD) for a short to ground. TEST the system for normal operation.
  8. I8 CHECK CIRCUIT SBB16 (VT/RD) FOR AN OPEN 
      Fig 7: Checking Circuit SBB16 (VT/RD) For An Open
      GF0029751Courtesy of FORD MOTOR CO.
    • Measure the resistance between the output side of BJB fuse 16 (15A), and TCM relay pin 30, circuit SBB16 (VT/RD).
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I10.
    2. NO  : REPAIR circuit SBB16 (VT/RD) for an open. TEST the system for normal operation.
  9. I9 CHECK THE TCM POWER CIRCUIT FOR A SHORT TO GROUND 
    • Disconnect: TCM C2352A
      • Fig 8: Checking TCM Power Circuit For A Short To Ground
      GF0029752Courtesy of FORD MOTOR CO.
    • Measure the resistance between TCM relay pin 87, circuit CE613 (VT/BK) and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : INSTALL a new TCM. TEST the system for normal operation.
    2. NO  : REPAIR circuit CE613 (VT/BK). TEST the system for normal operation.
  10. I10 CHECK THE TCM POWER SUPPLY FOR AN OPEN CIRCUIT 
      Fig 9: Measuring Resistance Between TCM Relay Pin 87 & TCM C2352A-2, Circuit CE613 (WH/VT)
      GF0041465Courtesy of FORD MOTOR CO.
    • Measure the resistance between TCM relay pin 87 and TCM C2352A-2, circuit CE613 (WH/VT).
      • Fig 10: Measuring Resistance Between TCM Relay Pin 87 & C2352A-10, Circuit CE613 (WH/VT)
      GF0041466Courtesy of FORD MOTOR CO.
    • Measure the resistance between TCM relay pin 87 and C2352A-10, circuit CE613 (WH/VT).
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  I11.
    2. NO  : REPAIR circuit CE613 (WH/VT) for an open. TEST the system for normal operation.
  11. I11 CHECK FOR POWER FROM THE SJB 
    • Key in ON position.
      • Fig 11: Checking Power From Smart Junction Box (SJB)
      GF0029754Courtesy of FORD MOTOR CO.
    • Measure the voltage between TCM C2352A-3 and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : INSTALL a new TCM. TEST the system for normal operation.
    2. NO  : REPAIR circuit SBP07 (WH/RD). TEST the system for normal operation.
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