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Home >> Lincoln >> 2009 >> MKX FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 936 (Anti-Theft System - Passive Anti-Theft System (Pats)) >> Diagnostic Tests >> Anti-Theft >> Pinpoint Tests >> Pinpoint Test D: DTC B1602 - PATS Received Invalid Format Of Key-Code From Ignition Key Transponder >> Pinpoint Test D: DTC B1602 - Pats Received Invalid Format Of Key-Code From Ignition Key Transponder

Pinpoint Test D: DTC B1602 - Pats Received Invalid Format Of Key-Code From Ignition Key Transponder

WARNING: This page is about a different car, the 2007 Ford Ranger. 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 vehicle starting concern and record diagnostic trouble codes (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 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, HUF are approved Ford PATS keys).
NOTE: Only 8 PATS keys can be programmed into the instrument cluster 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 PRESNT for the key to be valid.
  1. D1 RETRIEVE THE DTCs 
      NOTE: Follow this procedure using both PATS keys (using one at a time).
    • If only one key is available, cut a new key and program the keys. Refer to Key Programming Using Diagnostic Equipment  in this article.
    • Key in OFF position.
    • Connect the diagnostic tool.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Clear the DTCs
    • Key in OFF position.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Retrieve the DTCs
    • Is DTC B1602 retrieved for one or both PATS keys? 
    1. YES  : If DTC B1602 is retrieved for one key, REPLACE that key and PROGRAM the new key. REFER to Key Programming Using Diagnostic Equipment  in this article. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test.

      If DTC B1602 is retrieved for both PATS keys, go to  D2 .

    2. 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. D2 INSTALL A NEW PATS TRANSCEIVER 
    NOTE: Replacement of the PATS transceiver does not require the PATS keys to be programmed into the instrument cluster again.
    • Key in OFF position.
    • Install a new PATS transceiver. Refer to Passive Anti-Theft System (PATS) Transceiver  in this article.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Clear the DTCs
    • Key in OFF position.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Retrieve the DTCs
    • Are any PATS DTCs retrieved? 
    1. YES  : Go to  D3.
    2. 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.
  3. D3 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION 
    NOTE: When a new instrument cluster is installed, the PATS keys must be programmed into the new instrument cluster.
    NOTE: When a new instrument cluster is installed, the parameters must be reset in both the instrument cluster and the PCM.
    • Disconnect all the instrument cluster connectors.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect all the instrument cluster 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 instrument cluster. REFER to INSTRUMENT CLUSTER article. PROGRAM the PATS keys into the new instrument cluster. REFER to Key Programming Using Diagnostic Equipment  in this article. RESET the parameters in the instrument cluster and the PCM. REFER to Passive Anti-Theft System (PATS) Parameter Reset  in this article. CYCLE the ignition. REPEAT the self-test.
    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.
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