Pinpoint Test B: DTC B1600

WARNING: This page is about a different variant/trim than selected.

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 key 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.)

B1 RETRIEVE THE DTCs
- Ignition OFF.
- Connect the scan tool.
- Ignition ON.
- Clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Retrieve the DTCs.
- Is DTC B1600 retrieved?
- Yes: GO to B2 .
- No: If DTCs other than PATS DTCs are retrieved, REFER to the Diagnostic Trouble Code (DTC) Chart in MULTIFUNCTION ELECTRONIC MODULE article.
  If no DTCs are retrieved, the system is OK.
B2 CHECK BOTH PATS KEYS
NOTE: Make sure the new PATS keys are approved Ford encoded PATS keys. Unapproved PATS keys do not always operate correctly over various temperature ranges (PATS keys from Ford, Rotunda, Strattec, and Huf are approved Ford PATS keys).
- Obtain both PATS keys from the customer and follow the procedure using one PATS key, then the other. If the customer only has one PATS key, it will be necessary to cut a new PATS key.
- If it is necessary to cut a new PATS key, program the new PATS key. Refer to INTEGRATED KEYHEAD TRANSMITTER (IKT) KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT in this service information.
- Ignition ON.
- Clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Retrieve the DTCs.
- Using all existing keys, then the newly programmed key, is DTC B1600 present?
- Yes: If DTC B1600 is present for all keys, GO to B3 .
  If DTC B1600 is not present for all keys, the key may be damaged and should be replaced. CUT a new key to replace the damaged key. REFER to INTEGRATED KEYHEAD TRANSMITTER (IKT) KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT in this service information. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.
- No: If DTCs other than PATS DTCs are retrieved, REFER to the Diagnostic Trouble Code (DTC) Chart in MULTIFUNCTION ELECTRONIC MODULE article.
  If no DTCs are retrieved, the system is OK.
B3 INSTALL A NEW PATS TRANSCEIVER
NOTE: Replacement of the PATS transceiver does not require the PATS keys to be programmed into the IC again.

NOTE: Do not use the PATS key that may have been programmed in Step B2.
- Ignition OFF.
- Install a new PATS transceiver. Refer to PASSIVE ANTI-THEFT SYSTEM (PATS) TRANSCEIVER in this service information.
- Ignition ON.
- Clear the DTCs.
- Ignition OFF.
- Turn the key to the ON position using an existing customer PATS key.
- Retrieve the DTCs.
- Is DTC B1600 retrieved?
- Yes: GO to B4 .
- No: The system is OK.
B4 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?
- Yes: INSTALL a new IC . REFER to INSTRUMENTATION SYSTEM, MESSAGE CENTER & WARNING CHIMES article. RESET the parameters in both the IC and the PCM. REFER to PASSIVE ANTI-THEFT SYSTEM (PATS) PARAMETER RESET in this service information. PROGRAM the PATS keys into the new IC . REFER to INTEGRATED KEYHEAD TRANSMITTER (IKT) KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT in this service information. CYCLE the ignition. REPEAT the self-test.
- 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.