PINPOINT TEST D: DTCs B1600 AND B2431 - THE PASSIVE ANTI-THEFT SYSTEM (PATS) IGNITION KEY TRANSPONDER SIGNAL IS NOT RECEIVED OR THE TRANSPONDER PROGRAMMING FAILED (DAMAGED KEY OR NON-PATS KEY)

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. 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 2nd key on the same key ring as the passive anti-theft system (PATS) key may cause vehicle starting problems and record DTCs under certain conditions. If a fault cannot be identified, examine the customer's key 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 ensure 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 USE THE DTCS FROM THE POWERTRAIN CONTROL MODULE (PCM) SELF-TEST
- Use the recorded PCM 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 PASSIVE ANTI-THEFT SYSTEM (PATS) - DIAGNOSTIC TROUBLE CODES (DTC) INDEX . If no DTCs are retrieved, system is OK.
D2 PROGRAM A NEW PATS KEY
- Key in the OFF position for a minimum of 3 seconds.
- Cut a new PATS key.
- Key in ON position.
- Program the new PATS key. Refer to KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT in this article.
- Key in the OFF position for a minimum of 3 seconds.
- Enter the following diagnostic mode on the diagnostic tool: CLEAR DTCs.
- Enter the following diagnostic mode on the diagnostic tool: RETRIEVE DTCs.
- 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 PASSIVE ANTI-THEFT SYSTEM (PATS) - DIAGNOSTIC TROUBLE CODES (DTC) INDEX .
D3 INSTALL A NEW PATS TRANSCEIVER
- Key in the OFF position for a minimum of 3 seconds.
- 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 DTCs.
- Enter the following diagnostic mode on the diagnostic tool: RETRIEVE DTCs.
- Is DTC B1600 or B2431 retrieved?
Yes : INSTALL a new PCM. REFER to ELECTRONIC ENGINE CONTROLS - HYBRID . TURN the ignition switch to ON using 2 PATS keys. CARRY OUT the parameter reset procedure, REFER to PASSIVE ANTI-THEFT SYSTEM (PATS) PARAMETER RESET in this article. 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 in this article.

No : The system is OK.