Pinpoint Test D: DTC B1602
Anti-Theft
Pinpoint Test D: DTC B1602
Normal Operation
During each vehicle start sequence, the Passive Anti-Theft System (PATS) transceiver reads the PATS (Passive Anti-Theft System) key identification code and sends the data to the Instrument Cluster (IC).
- DTC B1602 (PATS (Passive Anti-Theft System) Received Invalid Format Of Key-Code From Ignition Key Transponder)- sets only when a partial PATS (Passive Anti-Theft System) key was read.
This pinpoint test is intended to diagnose the following:
- PATS (Passive Anti-Theft System) key
- PATS (Passive Anti-Theft System) transceiver
- IC (Instrument Cluster)
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 (Passive Anti-Theft System) 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 (Passive Anti-Theft System) key while starting the engine. These objects and devices cannot damage the PATS (Passive Anti-Theft System) 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 (Passive Anti-Theft System) key used by the customer is an approved Ford PATS (Passive Anti-Theft System) key (PATS (Passive Anti-Theft System) keys from Ford, Rotunda, Strattec, and Huf are approved Ford PATS (Passive Anti-Theft System) keys).
NOTE: Remote starter equipment can also cause DTC B1602.
D1 RETRIEVE THE DTCs
- NOTE: Follow this procedure using both PATS (Passive Anti-Theft System) 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 .
- Ignition OFF.
- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Clear the IC (Instrument Cluster) DTCs.
- Ignition OFF.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Retrieve the IC (Instrument Cluster) DTCs.
Is DTC B1602 retrieved for one or both PATS (Passive Anti-Theft System) keys?
Yes
If DTC B1602 is retrieved for one key, REPLACE that key and PROGRAM the new key. REFER to Key Programming Using Diagnostic Equipment . CLEAR the DTCs. CYCLE the ignition. REPEAT the self-test.
If DTC B1602 is retrieved for both PATS (Passive Anti-Theft System) keys, GO to D2.
No
The system is OK. CHECK all the customer PATS (Passive Anti-Theft System) keys by attempting to start the vehicle with each key to verify all other PATS (Passive Anti-Theft System) keys are programmed.
D2 INSTALL A NEW PATS (Passive Anti-Theft System) TRANSCEIVER
NOTE: Replacement of the PATS (Passive Anti-Theft System) transceiver does not require the PATS (Passive Anti-Theft System) keys to be programmed into the IC (Instrument Cluster) again.
- Ignition OFF.
- Install a new PATS (Passive Anti-Theft System) transceiver. Refer to Passive Anti-Theft System (PATS) Transceiver .
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Clear the IC (Instrument Cluster) DTCs.
- Ignition OFF.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Retrieve the IC (Instrument Cluster) DTCs.
Are any PATS (Passive Anti-Theft System) DTCs retrieved?
Yes
INSTALL the original PATS (Passive Anti-Theft System) transceiver. GO to D3.
No
The system is OK. CHECK all the customer PATS (Passive Anti-Theft System) keys by attempting to start the vehicle with each key.
D3 CHECK FOR CORRECT IC (Instrument Cluster) OPERATION
- Disconnect all the IC (Instrument Cluster) connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the IC (Instrument Cluster) connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new IC (Instrument Cluster). RESET the parameters in both the IC (Instrument Cluster) and the PCM. REFER to Passive Anti-Theft System (PATS) Parameter Reset . PROGRAM the PATS (Passive Anti-Theft System) keys into the new IC (Instrument Cluster). REFER to Key Programming 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.