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General Procedures > < Anti-Theft - Passive

Fiesta 2002.25 (11.2001-)

Anti-Theft - Passive - Anti-Theft - Passive Fiesta 2002.25 (11/2001-)
Diagnosis and Testing

Refer to Wiring Diagrams Section 419-01B, for schematic and connector information.

General Equipment
Worldwide Diagnostic System (WDS)

Inspection and Verification

  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Mechanical Electrical
  • Ignition lock cylinder
  • Passive anti-theft system (PATS) ignition key (blue dot)
  • Non-PATS ignition key
  • Use of a non-progammed PATS ignition key
  • Use of a non-encoded PATS ignition key
  • More than one PATS key in close proximity of the PATS transceiver
  • Fuse(s)
  • Wiring harness(s)
  • Electrical connector(s)
  • Relay(s)
  • PATS transceiver
  • Ignition switch
  • Powertrain control module (PCM)
  • Instrument cluster
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the cause is not visually evident, use WDS to retrieve any DTCs and refer to the Diagnostic Trouble Code (DTC) Index.

Diagnostic Trouble Code (DTC) Index

DTC Indicator Flash Code Description/Condition Possible Source Action
0000 - No DTCs, vehicle OK - -
B1681 11 PATS transceiver signal is not received PATS transceiver wiring, PATS transceiver connector, PATS transceiver, PCM or instrument cluster REFER to WDS.
B1232 and B2103 12 PATS transceiver antenna coil fault, vehicle does not start PATS transceiver, PATS transceiver mounting Make sure the PATS transceiver is connected correctly, if OK, install a new PATS transceiver.
B1600 13 Non-PATS key or damaged encoded ignition key, or no key code received, vehicle does not start PATS encoded ignition key REFER to WDS. PATS test. Follow the instructions.
B2431 13 PATS transponder programming failed crypto transponder only, vehicle does not start Ignition key REFER to WDS. PATS test. Follow the instructions.
B1602 14 Partial key read of PATS key, vehicle does not start PATS encoded ignition key, PATS transceiver REFER to WDS. PATS test. Follow the instructions.
B1601 15 Incorrect key code, Unprogrammed PATS key (keycode format OK), vehicle does not start (20 second anti-scan invoked) PATS encoded ignition key REFER to WDS. PATS test. Follow the instructions.
U2510 16 CAN communication link between the PCM and instrument cluster, vehicle does not start Circuit, PCM or instrument cluster REFER to WDS. PATS test. Follow the instructions.
B1213 21 Number of programmed PATS encoded keys below minimum, vehicle does not start Incorrect number of keys programmed or PATS encoded ignition key REFER to WDS. PATS test. Follow the instructions.
B2141 22 NVM Configuration failure. No security ID exchange between PCM and instrument cluster, vehicle does not start PCM or instrument cluster REFER to WDS. PATS test. Follow the instructions.
B2139 23 Data mismatch (received data does not match what was expected). Security messages do not match between PCM and instrument cluster, vehicle does not start PCM or instrument cluster REFER to WDS. PATS test. Follow the instructions. If the concern persists. INSTALL a new PCM.
REFER to: Powertrain Control Module (PCM) - 1.25L Duratec-16V (Sigma)/1.4L Duratec-16V (Sigma)/1.6L Duratec-16V (Sigma) (303-14 Electronic Engine Controls, Removal and Installation) /
Powertrain Control Module (PCM) - 1.4L Duratorq-TDCi (DV) Diesel (303-14 Electronic Engine Controls, Removal and Installation) /
Powertrain Control Module (PCM) - 2.0L Duratec-HE (MI4), Vehicles Without: PCM Security Shield (303-14 Electronic Engine Controls, Removal and Installation) /
Powertrain Control Module (PCM) - 2.0L Duratec-HE (MI4), Vehicles With: PCM Security Shield (303-14 Electronic Engine Controls, Removal and Installation) /
Powertrain Control Module (PCM) - 1.6L Duratorq-TDCi (DV) Diesel (303-14 Electronic Engine Controls, Removal and Installation).
P1260 - PCM disabled PCM or instrument cluster REFER to WDS. PATS test. Follow the instructions.

General Procedures > < Anti-Theft - Passive