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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 504 (Anti-Theft System) >> Diagnosis And Testing >> Passive Anti-Theft System (PATS) - Pinpoint Tests >> Pinpoint Test C: Pats Received Incorrect Key-Code From Ignition Key Transponder

Pinpoint Test C: Pats Received Incorrect Key-Code From Ignition Key Transponder

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: The PCM disables the engine for 20 seconds every time DTC B1601 is set. The ignition must remain in the RUN position for at least 20 seconds before an attempt is made to start the vehicle with any encoded ignition key. Check the PCM PID ANTISCAN for this unprogrammed key timeout status.
NOTE: Large metallic objects, electronic devices on the key chain that can be used to purchase gasoline or similar items, or a second key on the same key ring as the PATS ignition 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 ignition key while starting the engine. These objects and devices cannot damage the PATS ignition key, but can cause a momentary concern if they are too close to the key during engine start. If a concern occurs, turn ignition OFF and restart the engine with all other objects on the key ring held away from the ignition key. Check to make sure the encoded ignition key used by the customer is a Ford approved encoded ignition key.
  1. C1 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCS) 
    • Enter the following diagnostic mode on the diagnostic tool: Clear Continuous DTCs.
    • Key in OFF position.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Retrieve PCM Continuous DTCs.
    • Is DTC B1601 retrieved? 
    1. Yes  : GO to C2.
    2. No  : System is OK. CHECK all customer encoded ignition keys by attempting to start the vehicle with each key to verify all other encoded ignition keys are programmed.
  2. C2 CHECK FOR PROGRAMMED ENCODED 

    IGNITION KEYS - MONITOR THE PCM PID NUMKEYS 

    • Enter the following diagnostic mode on the diagnostic tool: Monitor the PCM PID NUMKEYS.
    • Does the PCM PID NUMKEYS display 8? 
    1. Yes  : ERASE and REPROGRAM the key codes. REFER to KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT . CLEAR the DTCs. REPEAT the self-test.
    2. No  : GO to C3.
  3. C3 CHECK THE NUMBER OF PROGRAMMED 

    ENCODED IGNITION KEYS AVAILABLE 

    • Verify there are at least two currently programmed encoded ignition keys available with the vehicle.
    • Are at least two currently programmed encoded ignition keys available with the vehicle? 
    1. Yes  : GO to C4.
    2. No  : CUT a new encoded ignition key so that at least two encoded ignition keys are available. PROGRAM the encoded ignition keys. REFER to SPARE KEY PROGRAMMING . GO to  C5.
  4. C4 VERIFY THE PCM PID SPARE_KY INDICATES YES 
    • Monitor the PCM PID SPARE_KY.
    • Does the PCM PID SPARE_KY indicate ENABLE? 
    1. Yes  : Spare key programming is enabled. REFER to KEY PROGRAMMING USING TWO PROGRAMMED KEYS . CLEAR the DTCs. REPEAT the self-test.
    2. No  : ENABLE the PCM PID SPARE-KEY. REFER to KEY PROGRAMMING SWITCH STATE CONTROL . CLEAR the DTCs. REPEAT the self-test.
  5. C5 CHECK THE ENCODED IGNITION KEYS FOR CORRECT OPERATION 
    • Key in OFF position.
    • Turn the ignition switch to ON for three seconds using the first encoded ignition key.
    • Key in OFF position.
    • Turn the ignition switch to ON for three seconds using the second ignition key.
    • Start the vehicle using the second encoded ignition key.
    • Does the vehicle start? 
    1. Yes  : The system is OK. If there are additional keys that need to be programmed, REFER to KEY PROGRAMMING USING TWO PROGRAMMED KEYS .
    2. No  : GO to C6.
  6. C6 RETRIEVE THE DTCS - CHECK FOR DTC B1601 
    • Enter the following diagnostic mode on the diagnostic tool: Clear PCM Continuous DTCs.
    • Key in OFF position.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Retrieve PCM Continuous DTCs.
    • Is DTC B1601 retrieved? 
    1. Yes  : GO to C7.
    2. No  : If other than PATS PCM DTCs are retrieved, REFER to the INTRODUCTION - CNG, FLEX-FUEL & GASOLINE article.

      If no PATS DTCs are retrieved, the system is OK.

  7. C7 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 the concern is still present.
    • Is the concern still present? 
    1. Yes  : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS .

      REPROGRAM the encoded ignition keys. REFER to KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT . CLEAR the DTCs. REPEAT the self-test.

    2. 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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