Pinpoint Test D: DTC B1600

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. 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 can cause vehicle starting concerns and can 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 PATS key. Check to make sure the PATS key used by the customer is an approved Ford PATS key. (PATS keys from Ford, Rotunda, Strattec or Huf are approved Ford PATS keys.)

D1 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 D2 .
- No: If DTCs other than PATS IC DTCs are retrieved, REFER to DIAGNOSTIC TROUBLE CODE (DTC) CHART .
  If no PATS DTCs are retrieved, PATS is OK.
D2 CHECK BOTH PATS KEYS
NOTE: Check to 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 or Huf are approved Ford PATS keys).
- Obtain both PATS keys from the customer and follow this procedure using one PATS key, then the other. If the customer only has one PATS key, it is 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 .
- Ignition ON.
- Clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Retrieve the DTCs.
- Is DTC B1600 present with either or both keys?
- Yes: If DTC B1600 is present for both keys, GO to D3 .
  If DTC B1600 is present for one key, that key may be damaged and should be replaced. CUT a new key to replace the damaged key. PROGRAM the PATS keys. REFER to INTEGRATED KEYHEAD TRANSMITTER (IKT) KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT . CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.
- No: If DTCs other than PATS IC DTCs are retrieved, REFER to DIAGNOSTIC TROUBLE CODE (DTC) CHART .
  If no PATS DTCs are retrieved, the PATS system is OK.
D3 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 .
- Ignition ON.
- Clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Turn the key to the ON position using an existing customer PATS key.
- Retrieve the DTCs.
- Is DTC B1600 retrieved?
- Yes: GO to D4 .
- No: PATS is OK. The concern was caused by an inoperative PATS transceiver.
D4 CHECK FOR CORRECT IC OPERATION
NOTE: When using the IDS , the IC and the TCM parameters are reset at the same time.
- 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 INSTRUMENT CLUSTER (IC) . CARRY OUT the parameter reset procedure on both modules. REFER to PASSIVE ANTI-THEFT SYSTEM (PATS) PARAMETER RESET . PROGRAM the PATS keys into the IC . REFER to INTEGRATED KEYHEAD TRANSMITTER (IKT) KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT . CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test. TEST the system for normal operation.
- No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.