Pinpoint Test D: DTC B1602 - Passive Anti-Theft System (Pats) Received Invalid Format Of Key-Code From Ignition Key Transponder
WARNING: This page is about a different car, the 2006 Mercury Grand Marquis and 2006 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
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 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 encoded ignition key used by the customer is a Ford approved, encoded ignition key. (Rotunda, Huf and Strattec are the only approved encoded ignition keys.)
- D1 RETRIEVE THE DIAGNOSTIC TROUBLE CODES (DTCs)
- 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 the PCM DTCs.
- Is DTC B1602 retrieved?
Yes : GO to D2.
No : The system is OK. CHECK all customer encoded ignition keys by cycling them in the ignition switch and determining if the vehicle starts.
- D2 CHECK PROGRAMMING WITH A NEW PATS KEY NOTE: Check to make sure the customer keys and the new encoded ignition keys are approved encoded PATS ignition keys and the correct part number for this model year. Unapproved PATS keys do not always operate correctly over different temperature ranges. (Rotunda, Huf and Strattec are the only approved encoded ignition keys.)
- Cut a new encoded ignition key.
- Program the new encoded ignition key. Refer to SPARE KEY PROGRAMMING .
- Key in OFF position.
- Key in ON position.
- Enter the following diagnostic mode on the diagnostic tool: Retrieve the PCM DTCs.
- Is DTC B1602 retrieved?
Yes : GO to D3.
No : If other than PATS PCM DTCs are retrieved, REFER to the INTRODUCTION - GASOLINE article.
If no PATS DTCs are retrieved, the system is OK.
- D3 INSTALL A NEW PATS TRANSCEIVER
- Enter the following diagnostic mode on the diagnostic tool: Clear PCM Continuous DTCs.
- Key in OFF position.
Install a new PATS transceiver. Refer to PASSIVE ANTI-THEFT SYSTEM (PATS) TRANSCEIVER .
- Key in ON position.
- Enter the following diagnostic mode on the diagnostic tool: Retrieve the PCM DTCs.
- Are any PATS DTCs retrieved?
Yes : REFER to the PASSIVE ANTI-THEFT SYSTEM (PATS) - DIAGNOSTIC TROUBLE CODES (DTC) INDEX .
No : The system is OK.