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Home >> Ford Truck >> 2010 >> F 150 2WD V8-5.4L Flex Fuel >> Repair and Diagnosis >> Accessories and Optional Equipment >> Antitheft and Alarm Systems >> Testing and Inspection >> Pinpoint Tests >> Anti-Theft >> Pinpoint Test C: DTC B1601

Pinpoint Test C: DTC B1601




Anti-Theft

Pinpoint Tests

Pinpoint Test C: DTC B1601

Normal Operation

The Passive Anti-Theft System (PATS) transceiver communicates with the PATS key. During each vehicle start sequence, the PATS transceiver reads the PATS key identification code and sends the data to the Instrument Cluster (IC). The PATS control functions are contained in the IC. The IC carries out all of the PATS functions, such as receiving the identification code from the PATS key and controlling engine enable. The IC initiates the key interrogation sequence when the key is turned to the ON or START position. If there is an issue with the PATS key (transponder) or the IC itself, the IC sets DTC B1601 and also sends a PATS disable message to the PCM. The PCM will not allow the fuel injectors or the starter to operate.

- DTC B1601 (PATS Received Incorrect Key-Code From Ignition Key Transponder) - sets when there is an unprogrammed PATS key. There is no concern with the PATS key itself, but the key must be programmed into the PATS memory (unless the maximum number of keys are already programmed).

This pinpoint test is intended to diagnose the following:

- PATS key
- IC



PINPOINT TEST C: DTC B1601

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 ignition switch 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, or Huf are approved Ford PATS keys.)

NOTE: Only 8 PATS keys can be programmed into the IC using the Key Programming Using Diagnostic Equipment procedure unless the unlimited key mode is active. If the N_KEYCODE (number of keys programmed) PID reads more than 2, the concern may be the PATS key being used is an unprogrammed key. Verify this by also viewing the MASTERKEY (verifies if the key is programmed) PID. It must read Present for the key to be valid.

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C1 RETRIEVE THE DTCs


- NOTE: Follow this procedure using both PATS keys (using one at a time).
- If only one key is available, cut a new key and program the keys. Refer to Key Programming Using Diagnostic Equipment Using Diagnostic Equipment.
- If both keys are available, program the keys. Refer to Key Programming Using Diagnostic Equipment Using Diagnostic Equipment.
- Ignition ON.
- Clear the IC DTCs.
- Ignition OFF.
- Ignition ON.
- Retrieve the IC DTCs.
- Is DTC B1601 retrieved for one or both PATS keys?

Yes
If DTC B1601 is retrieved for one PATS key, REPLACE that key and PROGRAM all the keys. REFER to Key Programming Using Diagnostic Equipment Using Diagnostic Equipment. CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test.

If DTC B1601 is retrieved for both PATS keys, GO to C2.

No
The system is OK at this time. CHECK all the customer PATS keys by attempting to start the vehicle with each key to verify all the other PATS keys are programmed.

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C2 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 Instrument Panel, Gauges and Warning Indicators. RESET the parameters in the IC and the PCM. REFER to Passive Anti-Theft System (PATS) Parameter Reset Passive Anti-Theft System (PATS). PROGRAM the PATS keys into the IC. REFER to Key Programming Using Diagnostic Equipment Using Diagnostic Equipment. 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.

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