Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Mercury >> 2009 >> Milan Premier, 3.0 1, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1010 (Module Communications Network) >> Diagnostic Tests >> Communications Network >> Pinpoint Tests >> Pinpoint Test B: The Transmission Control Module (TCM) Does Not Respond To The Scan Tool >> Pinpoint Test B: The Transmission Control Module (TCM) Does Not Respond To The Scan Tool

Pinpoint Test B: The Transmission Control Module (TCM) Does Not Respond To The Scan Tool

WARNING: This page is about a different car, the 2008 Mercury Milan, 2008 Lincoln MKZ, and 2008 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. B1 CHECK THE TCM VOLTAGE SUPPLY CIRCUITS FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: TCM C2352a (FNR5 Transaxle)
    • Disconnect: TCM C1533 (6-Speed Transaxle)
    • Key in ON position.
      • Fig 1: Checking Power From Smart Junction Box (SJB)
      GF0029754Courtesy of FORD MOTOR CO.
    • For FNR5 transaxles, measure the voltage between the TCM C2352a-3, circuit SBP23 (WH/RD), harness side and ground.
      • Fig 2: Checking TCM Voltage Supply Circuits For An Open (2 Of 2)
      GF0030543Courtesy of FORD MOTOR CO.
    • For 6-speed transaxles, measure the voltage between the TCM C1533-1, circuit SBB16 (VT/RD), harness side and ground; and between the TCM C1533-11, circuit CBP18 (GY/OG), harness side and ground.
    • Are the voltages greater than 10 volts? 
    1. YES  : Go to  B2.
    2. NO  : For FNR5 transaxles, VERIFY the battery junction box (BJB) fuse 23 (10A) is OK.

      For 6-speed transaxles, VERIFY the battery junction box (BJB) fuse 16 (15A) or SJB fuse 26 (7.5A), are OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.

  2. B2 CHECK THE TCM GROUND(S) 
    • Key in OFF position.
      • Fig 3: Checking TCM Ground Supply Circuit For Open
      GF0029749Courtesy of FORD MOTOR CO.
    • For FNR5 transaxles, measure the resistance between the TCM C2352a-1, circuit GD120 (BK/GN), harness side and ground; and between the TCM C2352a-9, circuit GD120 (BK/GN), harness side and ground.
      • Fig 4: Checking TCM Ground Supply Circuit For Open (2 Of 2)
      GF0030544Courtesy of FORD MOTOR CO.
    • For 6-speed transaxles, measure the resistance between TCM C1533-9, circuit GD120 (BK/GN), harness side and ground.
    • Are the resistances less than 5 ohms? 
    1. YES  : For FNR5 transaxles, go to  B3 .

      For 6-speed transaxles, go to  B4 .

    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
  3. B3 CHECK THE HS-CAN CIRCUITS BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE FNR5 TRANSAXLE TCM FOR AN OPEN 
    • Disconnect: TCM C2352b
      • Fig 5: Checking High Speed CAN Circuits Between DLC And TCM C2352B For Open (1 Of 2)
      GF0030545Courtesy of FORD MOTOR CO.
    • Measure the resistance between the TCM C2352b-1, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.
      • Fig 6: Checking High Speed CAN Circuits Between DLC And TCM C2352B For Open (2 Of 2)
      GF0030546Courtesy of FORD MOTOR CO.
    • Measure the resistance between the TCM C2352b-13, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  B5.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
  4. B4 CHECK THE HS-CAN CIRCUITS BETWEEN THE DLC AND THE 6-SPEED TRANSAXLE TCM FOR AN OPEN 
      Fig 7: Checking High Speed CAN Circuits Between DLC And TCM C1533 For Open (1 Of 2)
      GF0030547Courtesy of FORD MOTOR CO.
    • Measure the resistance between the TCM C1533-14, circuit VDB04 (WH/BU), harness side and the DLC C251-6, circuit VDB04 (WH/BU), harness side.
      • Fig 8: Checking High Speed CAN Circuits Between DLC And TCM C1533 For Open (2 Of 2)
      GF0030548Courtesy of FORD MOTOR CO.
    • Measure the resistance between the TCM C1533-6, circuit VDB05 (WH), harness side and the DLC C251-14, circuit VDB05 (WH), harness side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  B5.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
  5. B5 CHECK FOR CORRECT TCM OPERATION 
    • Disconnect the TCM connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the TCM connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new TCM. REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - AISIN AW21 article or AUTOMATIC TRANSAXLE/TRANSMISSION - FNR5 article. CLEAR the DTCs. REPEAT the network test with the scan tool.
    2. 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 network test with the scan tool.
scientia non olet · About Mike's Workshop Manuals