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Home >> Lincoln >> 2010 >> MKZ AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1261 (Anti-Theft System - Passive Anti-Theft System (Pats) - (Except Hybrid)) >> Diagnosis And Testing >> Anti-Theft >> Pinpoint Tests >> Pinpoint Test C: DTC B1601 >> Pinpoint Test C: DTC B1601

Pinpoint Test C: DTC B1601

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Large metallic objects, electronic devices on the key ring 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 a vehicle starting concern and record DTCs under certain conditions. If a fault cannot be identified, examine the customer 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 concern if they are too close to the key during engine start. If a concern occurs, turn the ignition switch off and restart the engine with all other objects on the key ring held away from the ignition key. Check to make sure the PATS  key used by the customer is an approved Ford PATS  key (PATS  keys from Ford, Rotunda, Strattec, and Huf are approved Ford PATS  keys).
NOTE: Only 8 PATS  keys can be programmed into the IC  during normal programming procedures (unless the unlimited key mode is enabled). If the N_KEYCODE PID reads more than 2 and less than 8, the concern may be the PATS  key being used is an unprogrammed key. Verify this by also viewing the MASTERKEY PID. It must read Present for the key to be a valid (programmed) key.
  1. C1 RETRIEVE THE DTCs 
    • Yes:  If DTC B1601 is retrieved for one PATS  key, REPLACE that key and PROGRAM all the keys. REFER to INTEGRATED KEYHEAD TRANSMITTER (IKT) KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT . CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test.

      If DTC B1601 is retrieved for both PATS  keys, GO to C2  .

    • No:  The system is OK. CHECK all the customer PATS  keys by attempting to start the vehicle with each key to verify all other PATS  keys are programmed.
  2. C2 CHECK THE PATS TRANSCEIVER 
    NOTE: Replacement of the PATS  transceiver does not require the PATS  keys to be programmed into the IC  again.
    • Yes:  GO to C3  .
    • No: PATS  is OK. CHECK all the customer PATS  keys by attempting to start the vehicle with each key to verify all the other PATS  keys are programmed.
  3. C3 CHECK FOR CORRECT IC OPERATION 
    • Disconnect the IC  connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the IC  connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
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