419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start 2014 Fiesta
Diagnosis and Testing Procedure revision date: 02/22/2013

Passive Anti-Theft System (PATS)

IPC DTC Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).




  DTC Description Action
B10D5:94 PATS Antenna: Unexpected Operation INSTALL a new PATS transceiver.
REFER to: Passive Anti-Theft System (PATS) Transceiver (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, Removal and Installation).
B10D7:05 PATS Key: System Programming Failure   GO to Pinpoint Test A
B10D7:51 PATS Key: Not Programmed PROGRAM the PATS key in question.
REFER to: Key Programming Using Diagnostic Equipment (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, General Procedures).
B10D7:81 PATS Key: Invalid Serial Data Received   GO to Pinpoint Test B
B10D7:87 PATS Key: Missing Message   GO to Pinpoint Test C
B10D7:94 PATS Key: Unexpected Operation   GO to Pinpoint Test B
B10D8:00 PATS Key Less Than Minimum Programmed: No Sub Type Information Less than 2 keys are programmed (minimum of 2 keys must be programmed). CYCLE the customer's second key in the ignition key cylinder to program (when less than 2 keys are programmed, the IPC automatically programs the first 2 keys that are cycled in the ignition key cylinder).
B10DA:51 PATS Target Identifier: Not Programmed There is no PCM ID stored in the IPC memory. PERFORM a parameter reset.
REFER to: Passive Anti-Theft System (PATS) Parameter Reset (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, General Procedures).
B10DA:62 PATS Target Identifier: Signal Compare Failure The PCM ID received by the IPC does not match the ID stored in the IPC memory. PERFORM a parameter reset.
REFER to: Passive Anti-Theft System (PATS) Parameter Reset (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, General Procedures).
All other Diagnostic Trouble Codes (DTCs) -  
REFER to: Instrumentation, Message Center and Warning Chimes (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).


PCM DTC Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).




  DTC Description Action
U0167:00 Lost Communication With Vehicle Immobilizer Control Module: No Sub Type Information   GO to Pinpoint Test D
U0426:00 Invalid Data Received From Vehicle Immobilizer Control Module: No Sub Type Information   GO to Pinpoint Test D
All other Diagnostic Trouble Codes (DTCs) -  
REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 1.6L EcoBoost (132kW/180PS) - Sigma, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 1.6L Duratec-16V Ti-VCT (88kW/120PS) - Sigma, Diagnosis and Testing).


Symptom Chart

Symptom Chart: PATS

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).




Condition Possible Causes Actions
The engine does not start
  • Refer to the Pinpoint Test


Pinpoint Tests

B10D7:05

Normal Operation and Fault Conditions

When the IPC enters a key programming state, it activates the transceiver to read the key in the ignition. The key is programmed into the IPC memory if a valid PATS key is used and there are no concerns with the PATS .



  IPC DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
B10D7:05 PATS Key: System Programming Failure A continuous DTC that sets when a PATS key is unsuccessfully programmed into the IPC .


Possible Causes


PINPOINT TEST A : B10D7:05
NOTE: This pinpoint test requires a second programmed PATS key. If only one key is available, obtain a second programmed PATS key.
A1   CHECK THE IPC (INSTRUMENT PANEL CLUSTER) DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE SELF-TEST
  • Check the recorded results from the IPC self-test.

Is DTC B10D5:94, B10D7:81, B10D7:87, or B10D7:94 present?

Yes DIAGNOSE those Diagnostic Trouble Codes (DTCs) first. REFER to the IPC DTC Chart in this section.
No GO to A2


A2   CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) KEY
  • Verify the correct PATS keys are used with the vehicle.

Are the correct keys being used?

Yes ATTEMPT to program the key again. If key programming fails, DISCARD the damaged key and PROGRAM a new key.
REFER to: Key Programming Using Diagnostic Equipment (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, General Procedures).

PROGRAM the RKE transmitters.
REFER to: Remote Keyless Entry (RKE) Transmitter Programming (501-14 Handles, Locks, Latches and Entry Systems, General Procedures).
No OBTAIN the correct key(s) for the vehicle. PROGRAM the new key(s).
REFER to: Key Programming Using Diagnostic Equipment (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, General Procedures).

PROGRAM the RKE transmitters.
REFER to: Remote Keyless Entry (RKE) Transmitter Programming (501-14 Handles, Locks, Latches and Entry Systems, General Procedures).



B10D7:81 or B10D7:94

Normal Operation and Fault Conditions

When the BCM enters a key programming state, it activates the PATS transceiver to read the key in the ignition lock cylinder. If a valid PATS key is used and there are no concerns with PATS , the key is programmed into the BCM memory.

When the IPC enters a key programming state, it activates the transceiver to read the key in the ignition. The key is programmed into the IPC memory if a valid PATS key is used and there are no concerns with the PATS .



  IPC DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
B10D7:81 PATS Key: Invalid Serial Data Received A continuous and on-demand DTC that sets when there is a partial or corrupt PATS key read.
B10D7:94 PATS Key: Unexpected Operation A continuous and on-demand DTC that sets when there is no PATS key read. This DTC sets if a non- PATS key is used to turn the ignition on.


Possible Causes

Visual Inspection and Diagnostic Pre-checks


PINPOINT TEST B : B10D7:81 OR B10D7:94
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 record Diagnostic Trouble Codes (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.
NOTE: Aftermarket or dealer-installed remote start systems may adversely affect the PATS operation. Disconnect these systems before diagnosing any PATS concerns.
B1   CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) KEYS
  • Verify the correct PATS keys are used with the vehicle.

Are the correct keys being used?

Yes GO to B2
No OBTAIN the correct key(s) for the vehicle. PROGRAM the new key(s).
REFER to: Key Programming Using Diagnostic Equipment (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, General Procedures).

PROGRAM the RKE transmitters.
REFER to: Remote Keyless Entry (RKE) Transmitter Programming (501-14 Handles, Locks, Latches and Entry Systems, General Procedures).


B2   ISOLATE THE PATS (PASSIVE ANTI-THEFT SYSTEM) KEYS
  • NOTE: Follow this procedure using both PATS keys (using one at a time).

    Place a PATS key in the ignition and turn to the ON position.
  • Using a diagnostic scan tool, clear the IPC Diagnostic Trouble Codes (DTCs).
  • Cycle the ignition from ON to OFF and then back to the ON position. Wait 10 seconds.
  • Using a diagnostic scan tool, perform the IPC Diagnostic Trouble Codes (DTCs).

Is DTC B10D7:81 or B10D7:94 retrieved for both keys?

Yes INSTALL a new PATS transceiver.
REFER to: Passive Anti-Theft System (PATS) Transceiver (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, Removal and Installation).
No DISCARD the key in question. PROGRAM the new key.
REFER to: Key Programming Using Diagnostic Equipment (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, General Procedures).

PROGRAM the RKE transmitters.
REFER to: Remote Keyless Entry (RKE) Transmitter Programming (501-14 Handles, Locks, Latches and Entry Systems, General Procedures).



B10D7:87


Refer to Wiring Diagrams Cell 112 for schematic and connector information.

Normal Operation and Fault Conditions

When the ignition is turned to the ON or START position, the IPC initiates the key interrogation sequence. The IPC starts the interrogation sequence by generating a signal and sending that signal to the PATS transceiver on the transmit circuit. When the PATS transceiver receives the signal from the IPC , it reads the PATS key and generates a challenge response to the IPC signal on the receive circuit.



  IPC DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
B10D7:87 PATS Key: Missing Message A continuous and on-demand DTC that sets when the IPC does not receive a response from the PATS transceiver.


Possible Causes

Visual Inspection and Diagnostic Pre-checks


PINPOINT TEST C : B10D7:87
C1   CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
  • Disconnect PATS Transceiver C252 .
  • Ignition ON.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C252-1   Ground



Is the voltage greater than 11 volts?

Yes GO to C2
No VERIFY the CJB fuse 21 (7.5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short.


C2   CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C252-2   Ground



Is the resistance less than 3 ohms?

Yes GO to C3
No REPAIR the circuit.


C3   CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER CIRCUITS FOR A SHORT TO VOLTAGE
  • Disconnect IPC C220A .
  • Ignition ON.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C252-3   Ground
      C252-4   Ground



Is any voltage present?

Yes REPAIR the circuit in question.
No GO to C4


C4   CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER CIRCUITS FOR A SHORT TO GROUND
  • Ignition OFF.
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C252-3   Ground
      C252-4   Ground



Are the resistances greater than 10,000 ohms?

Yes REPAIR the circuit in question.
No GO to C5


C5   CHECK THE PATS (PASSIVE ANTI-THEFT SYSTEM) TRANSCEIVER CIRCUITS FOR AN OPEN
  • Measure:


    Positive Lead Measurement / Action Negative Lead
      C252-3   C220A-5
      C252-4   C220A-3



Are the resistances less than 3 ohms?

Yes INSTALL a new PATS transceiver.
REFER to: Passive Anti-Theft System (PATS) Transceiver (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, Removal and Installation).

TEST the system for normal operation. If the concern is still present, GO to C6
No REPAIR the circuit in question.


C6   CHECK FOR CORRECT IPC (INSTRUMENT PANEL CLUSTER) OPERATION
  • Disconnect and inspect all of the IPC connectors.
  • Repair:
    • corrosion (install new connectors or terminals, clean module pins)
    • damaged or bent pins - install new terminals/pins
    • pushed-out pins - install new pins as necessary
  • Reconnect all the IPC connectors and make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new IPC .
REFER to: Instrument Panel Cluster (IPC) (413-01 Instrumentation, Message Center and Warning Chimes, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.



U0167:00 or U0426:00

Normal Operation and Fault Conditions

When the ignition is turned to the ON or START position, the IPC and the PCM send each other their ID over the HS-CAN . Each module then checks the ID it receives and compares with the ID stored in memory. If the IDs are missing or invalid, the PATS does not allow the vehicle to start.



  PCM DTC Fault Trigger Conditions


  DTC Description Fault Trigger Conditions
U0167:00 Lost Communication With Vehicle Immobilizer Control Module: No Sub Type Information A continuous DTC that sets when the PCM does not receive any PATS data from the IPC . The target ID is only sent once per key cycle and within milliseconds of the ignition switch being turned to the ON or START position.
U0426:00 Invalid Data Received From Vehicle Immobilizer Control Module: No Sub Type Information A continuous DTC that sets when the PCM does not receive the expected target ID from the IPC . The target ID is only sent once per key cycle and within milliseconds of the ignition switch being turned to the ON or START position. This DTC can also set if a new PCM has been installed and the PATS Parameter Reset procedure has not been performed


Possible Causes


PINPOINT TEST D : U0167:00 OR U0426:00
D1   CHECK FOR COMMUNICATION WITH THE IPC (INSTRUMENT PANEL CLUSTER)
  • Ignition ON.
  • Using a diagnostic scan tool, perform the network test.

Does the IPC pass the network test?

Yes GO to D2
No
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).


D2   CHECK FOR IPC (INSTRUMENT PANEL CLUSTER) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, perform the IPC self-test.

Are any IPC Diagnostic Trouble Codes (DTCs) present?

Yes DIAGNOSE the IPC Diagnostic Trouble Codes (DTCs) first. REFER to the IPC DTC Chart in this section.
No GO to D3


D3   CHECK THE BATTERY STATE OF CHARGE
  • Perform the Battery Condition Test.
    REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Does the battery pass the Battery Condition Test?

Yes GO to D4
No RECHARGE or REPLACE the battery as necessary.
REFER to: Battery Charging (414-01 Battery, Mounting and Cables, General Procedures).


D4   RECHECK THE PCM (POWERTRAIN CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE SELF-TEST
  • Ignition ON.
  • Using a diagnostic scan tool, clear the PCM Diagnostic Trouble Codes (DTCs).
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the PCM IPC self-test.

Is DTC U0167:87 or U0426:81 still present?

Yes GO to D5
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.


D5   CHECK FOR CORRECT IPC (INSTRUMENT PANEL CLUSTER) OPERATION
  • Ignition OFF.
  • Disconnect and inspect all of the IPC connectors.
  • Repair:
    • corrosion (install new connectors or terminals, clean module pins)
    • damaged or bent pins - install new terminals/pins
    • pushed-out pins - install new pins as necessary
  • Reconnect all the IPC connectors and make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?

Yes CHECK OASIS for any applicable Technical Service Bulletins (TSBs). If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no Technical Service Bulletins (TSBs) address this concern, INSTALL a new IPC .
REFER to: Instrument Panel Cluster (IPC) (413-01 Instrumentation, Message Center and Warning Chimes, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. Address the root cause of any connector or pin issues.



The Vehicle Does Not Start

Normal Operation and Fault Conditions


REFER to: Passive Anti-Theft System (PATS) - System Operation and Component Description (419-01B Passive Anti-Theft System (PATS) - Vehicles Without: Keyless Entry and Push Button Start, Description and Operation).

The PATS prevents the vehicle from starting by disabling the fuel injectors and the starter. When the ignition is turned to the ON or START position, the IPC checks the PATS key and checks the PCM ID. If an unprogrammed PATS key is used or an invalid PCM ID is received, the PATS prevents the vehicle from starting. If a PATS concern is present that prevents the vehicle from starting, an anti-theft message displays in the message center.

Possible Causes


PINPOINT TEST E : THE VEHICLE DOES NOT START
E1   CHECK FOR COMMUNICATION WITH THE PCM (POWERTRAIN CONTROL MODULE) AND THE IPC (INSTRUMENT PANEL CLUSTER)
  • Ignition ON.
  • Using a diagnostic scan tool, perform the network test.

Do the PCM and the IPC pass the network test?

Yes GO to E2
No
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).


E2   CHECK FOR PATS (PASSIVE ANTI-THEFT SYSTEM) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, perform the IPC self-test.
  • Using a diagnostic scan tool, perform the PCM self-test.

Are any PATS Diagnostic Trouble Codes (DTCs) present?

Yes REFER to the IPC DTC Chart or the PCM DTC Chart in this section.
No The no-start condition is not caused by the PATS . DIAGNOSE the no-start condition.

REFER to: Starting System (303-06A Starting System - 1.6L Duratec-16V Ti-VCT (88kW/120PS) - Sigma, Diagnosis and Testing).


REFER to: Starting System (303-06B Starting System - 1.6L EcoBoost (132kW/180PS) - Sigma, Diagnosis and Testing).

Refer to Powertrain Control/Emissions Diagnosis (PC/ED) manual.





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