Pinpoint Test I: DTC U0101 - Lost Communication With TCM, DTC U2511 - Can - Data Mis-Match (Receive Data Does Not Match Expected)

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: When a new IC is installed, the PATS keys must be programmed into the new IC.

NOTE: When a new IC is installed, the parameters must be reset in the IC and the TCM.

I1 CHECK THE BATTERY STATE OF CHARGE (SOC)
- Key in OFF position.
- Check the battery state of charge (SOC) with the battery condition test. Refer to BATTERY, MOUNTING AND CABLES article.
- Does the battery pass the battery condition test?
1. YES : Go to I2.
2. NO : REFER to CHARGING SYSTEM - GENERAL INFORMATION article to diagnose the low battery voltage condition.
I2 CHECK FOR MODULE COMMUNICATION ON THE HS-CAN
- Connect the diagnostic tool.
- Key in ON position.
- Carry out the network test using the scan tool.
- Is the scan tool able to communicate with all of the modules on the HS-CAN?
1. YES : Fault is not currently present, go to I3.
2. NO : REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the module that is not communicating with the scan tool.
I3 INSPECT THE HS-CAN CIRCUITRY
- Key in OFF position.
- Inspect all of the HS-CAN for a faulty or intermittent connection, including the pin crimps, connector fit, corroded/bent/pushed-out/damaged pins and splice integrity in the 6 splices and 6 connections (3 connectors) between the TCM and the IC. This includes:
  - C1458A (TCM)
  - S119
  - S120
  - S137
  - S138
  - C212
  - S227
  - S228
  - C220 (IC)
- Does the HS-CAN network pass the component inspection?
1. YES : Go to I4.
2. NO : REPAIR the HS-CAN circuitry as necessary. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.
I4 CHECK FOR CORRECT TCM OPERATION
NOTE: When a new TCM is installed, the PATS keys do not need to be programmed into the IC.

NOTE: When a new TCM is installed, the parameters must be reset in the IC and the TCM.
- Disconnect all the TCM connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all the TCM connectors and make sure they seat 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 - ELECTRONICALLY CONTROLLED CONTINUOUSLY VARIABLE TRANSMISSION (ECVT) article. RESET the parameters in both the IC and the TCM. REFER to Passive Anti-Theft System (PATS) Parameter Reset . CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation. If the concern is still present, go to I5.
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. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.
I5 CHECK FOR CORRECT IC OPERATION
NOTE: When a new IC is installed, the PATS keys must be programmed into the new IC.

NOTE: When a new IC is installed, the parameters must be reset in the IC and the TCM.
- Disconnect all the IC connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all the IC connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
1. YES : INSTALL a new IC. REFER to INSTRUMENT CLUSTER (IC), MESSAGE CENTER, AND WARNING CHIMES article. RESET the parameters in both the IC and the TCM. REFER to Passive Anti-Theft System (PATS) Parameter Reset . PROGRAM the PATS keys into the new IC. REFER to Spare Key Programming - Using Diagnostic Equipment . CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.
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. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.