Normal Operation and Fault Conditions

On vehicles equipped with a 3.2L engine, the TCM is a separate module from the PCM. With the ignition ON, the TCM sends messages to the ABS module over the HS-CAN. If the ABS module does not receive these messages within the specified time frame, the ABS module sets DTCs. This can be due to a TCM failure, a circuit failure on the HS-CAN or an excessive load on the network. For information on the messages sent to the ABS module by the TCM, refer to the Description and Operation in  Anti-Lock Brake System (ABS) And Stability Control (Except Hybrid)  . 

Possible Causes 

• Network communication concern
• TCM
• ABS module

1. Q1: CHECK THE COMMUNICATION NETWORK 
   • Ignition ON, engine OFF.
   • Press the Read Vehicle Information button to view the results of the modules communicating on the network.
   • Retrieve the continuous memory DTCs.
   • Does the TCM pass the Network Test? 

     Yes	No
     Go to  Q2.	DIAGNOSE the scan tool does not communicate with the TCM. REFER to Module Communications Network (Except Hybrid) .

2. Q2: CHECK THE ABS MODULE DTCS 
   • Carry out the ABS self-test.
   • Clear the ABS DTCs.
   • Ignition OFF.
   • Ignition ON, engine OFF.
   • Carry out the ABS self-test.
   • Is DTC U0100:xx or U0402:xx retrieved again? 

     Yes	No
     Go to  Q3.	The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

3. Q3: CHECK FOR ABS MODULE DTC U3003:16 AND U3003:17 
   • Review the results from the ABS module self-test.
   • Is DTC U3003:16 or U3003:17 present? 

     Yes	No
     For DTC U3003:16, Go to PINPOINT TEST A . For DTC U3003:17, Go to PINPOINT TEST F .	Go to  Q4.

4. Q4: CHECK FOR DTCS IN THE TCM 
   • Carry out the TCM self-test.
   • Are any DTCs present? 

     Yes	No
     DIAGNOSE the TCM DTC. REFER to the appropriate Automatic Transmission article.	Go to  Q5.

5. Q5: CHECK FOR DTC U0101:XX, U0402:XX SET IN OTHER MODULES 
   • Retrieve the continuous memory DTCs.
   • Is DTC U0100:xx or U0402:xx set in any module in addition to the ABS module? 

     Yes

     No

     CHECK OASIS for any applicable Technical Service Bulletins TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new TCM. REFER to the appropriate Automatic Transmission article.

     INSTALL a new ABS module. CHECK OASIS for any applicable Technical Service Bulletins TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the TSB instructions. If no TSBs address this concern, INSTALL a new ABS module. REFER to Anti-Lock Brake System (ABS) And Stability Control (Except Hybrid) . ORDER a replacement ABS module and INCLUDE the RVC on the form. If this is a Ford paid repair, INCLUDE the RVC on the warranty claim form. When complete, SELECT the "X" in the top right corner to CLOSE this procedure.