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Pinpoint Test D: The Passive Anti-Theft System (Pats) Transceiver Module Signal Is Not Received

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Large metallic objects, or electronic devices on the keychain that can be used to purchase gasoline or similar items or a second key on the same key ring as the PATS key may cause vehicle starting problems and record DTCs under certain conditions. If a fault cannot be identified, examine the customer's key ring for such objects or devices. If present, inform the customer that they need to keep these objects from touching the PATS key while starting the engine. These objects and devices cannot damage the PATS key, but can cause a momentary problem if they are too close to the PATS key during engine start. If a concern occurs, turn the key OFF and restart the engine with all other objects on the key ring held away from the PATS key. Check to make sure the PATS key used by the customer is an approved Ford PATS key. (PATS keys from Rotunda or Strattec are approved Ford PATS keys.)
  1. D1 RETRIEVE THE DTCS 
    • Clear the PCM DTCs.
    • Key in OFF position.
    • Key in ON position.
    • Retrieve the PCM DTCs.
    • Is DTC B1600 retrieved? 

    Yes 

    GO to D2

    No 

    If other DTCs are retrieved, refer to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE to continue diagnosis of the other DTCs. If no DTCs are retrieved, the system is OK.

  2. D2 INSTALL A NEW PATS KEY 
    NOTE: Check to make sure the customer is using new PATS keys that are approved Ford PATS keys. Unapproved PATS keys do not always operate correctly over different temperature ranges. (PATS keys from Rotunda or Strattec are approved Ford PATS keys.)

    Yes 

    GO to D3

    No 

    If other than PATS PCM DTCs are retrieved, refer to INTRODUCTION - CNG, FLEX-FUEL & GASOLINE to continue diagnosis of the other DTCs. If no PATS DTCs are retrieved, the system is OK.

  3. D3 INSTALL A NEW PATS TRANSCEIVER 
    NOTE: When a new PCM is installed, the PATS keys must be programmed.
    • Install a new PATS transceiver Refer to PASSIVE ANTI-THEFT SYSTEM (PATS) TRANSCEIVER .
    • Key in ON position.
    • Clear the PCM DTCs.
    • Key in OFF position.
      • NOTE: Do not use the PATS key that was programmed in D2.
    • Key in ON position using an existing customer PATS key.
    • Retrieve the PCM DTCs.
    • Is DTC B1600 retrieved? 

    Yes 

    GO to D4.

    No 

    The system is OK.

  4. D4 CHECK FOR CORRECT PCM OPERATION 
    • Disconnect all the PCM connectors.
    • Check for:
      • Corrosion
      • pushed-out pins
    • Connect all the PCM connectors and make sure they seat correctly.
    • Operate the system and verify that the concern is still present.
    • Is the concern still present? 

    Yes 

    INSTALL a new PCM. Refer to POWERTRAIN CONTROL MODULE (PCM) . REPROGRAM the PATS keys. Refer to KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT . CLEAR the DTCs. REPEAT the self-test.

    No 

    The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.

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