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Home >> Mercury >> 2009 >> Sable FWD V6-3.5L >> Repair and Diagnosis >> Accessories and Optional Equipment >> Antitheft and Alarm Systems >> Testing and Inspection >> Pinpoint Tests >> Anti-Theft - Passive Anti-Theft System (PATS) >> Pinpoint Test D: DTC B1602

Pinpoint Test D: DTC B1602




Anti-Theft

Pinpoint Tests

Pinpoint Test D: DTC B1602

Normal Operation

During each vehicle start sequence, when the key is turned to the START or ON position, the Passive Anti-Theft System (PATS) transceiver reads the PATS key identification code and sends the data to the Instrument Cluster (IC).

- DTC B1602 (PATS Received Invalid Format Of Key-Code From Ignition Key Transponder) - a continuous and on-demand DTC that sets when only a partial PATS key was read. Remote starter equipment can also cause this DTC.

This pinpoint test is intended to diagnose the following:
- PATS key
- PATS transceiver
- IC



PINPOINT TEST D: DTC B1602

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 vehicle starting concerns 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 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: This vehicle uses a Strattec Integrated Keyhead Transmitter (IKT) key. If replacing an IKT key for any of these vehicles, it is recommended that the original Strattec IKT key be replaced with another Strattec IKT key. There are minor visual differences both externally and internally between the Strattec IKT key and IKT keys used on other Ford, Lincoln, and Mercury vehicles that may be noticed by the customer. These visual differences will not affect the IKT key functionality in any way. Rotunda should supply a Strattec IKT key when ordering replacement/new keys for this vehicle. The Owner's Literature may provide additional information concerning these differences. If replacing an IKT key (or adding another key) with a standard PATS key (not an IKT key), any of the brands mentioned above (Ford, Rotunda, Strattec or HUF) will operate the system.

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D1 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 Integrated Keyhead Transmitter (IKT) Key Programming Using Diagnostic Equipment Using Diagnostic Equipment.
- Ignition ON.
- Clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Retrieve the DTCs.
- Is DTC B1602 retrieved for one or both PATS keys?

Yes
If DTC B1602 is retrieved for one key, REPLACE that key and PROGRAM the new key. REFER to Spare Key Programming - Using Diagnostic Equipment Using Diagnostic Equipment. CLEAR the DTCs. CYCLE the ignition.
REPEAT the self-test.

If DTC B1602 is retrieved for both PATS keys, GO to D2 .

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

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D2 INSTALL A NEW PATS TRANSCEIVER


NOTE: Replacement of the PATS transceiver does not require the PATS keys to be programmed into the IC again.

- Ignition OFF.
- Install a new PATS transceiver. Refer to Passive Anti-Theft System (PATS) Transceiver Service and Repair.
- Ignition ON.
- Clear the DTCs.
- Ignition OFF.
- Ignition ON.
- Retrieve the DTCs.
- Are any PATS DTCs retrieved?

Yes
GO to D3.

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

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D3 CHECK FOR CORRECT IC OPERATION


NOTE: When a new IC is installed, the PATS keys must be programmed into the new IC.

NOTE: When a new IC is installed, the parameters must be reset in the IC and the PCM.

- 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. RESET the parameters in both 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 new IC. REFER to Integrated Keyhead Transmitter (IKT) Key Programming Using Diagnostic Equipment Using Diagnostic Equipment. 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.

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