Pinpoint Test D: DTCS B1600 The Pats Ignition Key Transponder Signal Is Not Received (Damaged Key Or Non-Pats Key) And B2431 The Transponder Programming Failed

WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Large metallic objects, electronic debit transponder devices 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 key during engine start.

If a problem occurs, turn the ignition switch 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, Huf or Strattec are approved Ford PATS keys.)

D1 RETRIEVE THE RECORDED DTCS FROM THE INSTRUMENT CLUSTER CONTINUOUS AND ON-DEMAND SELF-TESTS
- Enter the following diagnostic mode on the diagnostic tool: CLEAR DTCs.
- Check for recorded instrument cluster continuous and on-demand self-test DTCs.
- Is DTC B1600 or B2431 retrieved?
Yes : GO to D2.

No : If other DTCs are retrieved, REFER to the PASSIVE ANTI-THEFT SYSTEM (PATS) - DIAGNOSTIC TROUBLE CODES (DTC) INDEX . If no DTCs are retrieved, the system is OK.
D2 PROGRAM A NEW PATS KEY
- Key in OFF position.
- Unapproved PATS keys do not always operate correctly over different temperature ranges. (PATS keys from Rotunda, Huf or Strattec are approved PATS keys.)
  Cut a new PATS key.
- Program the new PATS key. Refer to KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT .
- Key in ON position.
- Enter the following diagnostic mode on the diagnostic tool: CLEAR DTCs.
- Carry out the instrument cluster self-test.
- Is DTC B1600 or B2431 still present?
Yes : GO to D3.

No : If no other DTCs are retrieved, the system is OK.

If other DTCs are retrieved, REFER to the PASSIVE ANTI-THEFT SYSTEM (PATS) - DIAGNOSTIC TROUBLE CODES (DTC) INDEX .
D3 INSTALL A NEW PATS TRANSCEIVER
- Key in OFF position.
- Install a new PATS transceiver. Refer to PASSIVE ANTI-THEFT SYSTEM (PATS) TRANSCEIVER .
- Key in ON position.
  NOTE: Use the customer's original PATS key, not the PATS key that was cut in the previous step.
- Enter the following diagnostic mode on the diagnostic tool: CLEAR DTCs.
- Carry out the instrument cluster self-test.
- Is DTC B1600 or B2431 retrieved?
Yes : INSTALL a new instrument cluster. REFER to INSTRUMENT CLUSTER . TURN the ignition switch to ON using 2 PATS keys. CARRY OUT a parameter reset on both modules. REFER to PASSIVE ANTI-THEFT SYSTEM (PATS) PARAMETER RESET . CLEAR the DTCs. REPEAT the self-test. If the vehicle is equipped with the valet feature, PROGRAM the third key (if available) or INSTRUCT the customer on how to carry out this procedure. REFER to KEY PROGRAMMING USING TWO PROGRAMMED KEYS .

No : The system is OK.