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General Procedures > < Anti-Theft - Passive

C-MAX 2003.75 (06.2003-)

Anti-Theft - Passive - Anti-Theft - Passive C-MAX 2003.75 (06/2003-)
Diagnosis and Testing

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

General Equipment
Worldwide Diagnostic System (WDS) (418-F224)

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
  • Use of a non-encoded PATS ignition key
  • More than one PATS key in close proximity of the PATS transceiver
  • Central junction box (CJB)
  • Powertrain control module (PCM)
  • Instrument cluster
  • Fuse(s)
  • Wiring harness
  • Electrical connector(s)
  • Relay(s)
  • CJB
  • PCM
  • PATS transceiver
  • Ignition switch
  • 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, refer to the Diagnostic Trouble Code (DTC) Index.

Diagnostic Trouble Code (DTC) Index

DTC Indicator Flash Code Description/Condition Possible Source Action
0000 - No DTC's, vehicle OK
B1681 11 PATS transceiver signal is not received PATS transceiver wiring transceiver connector, transceiver, CJB, PCM or instrument cluster REFER to WDS.
B1232
B2103		 12 PATS transceiver antenna coil fault, vehicle does not start PATS transceiver Install a new PATS transceiver.
REFER to Passive Anti-Theft System (PATS) Transceiver - in this section.
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, 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.
U1147 16 Incorrect key being used, vehicle does not start Ignition key Use correct 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. If the concern persists. INSTALL a new PATS system.
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 Section  303-14 Electronic Engine Controls.
P1260 - PCM disabled PCM or instrument cluster REFER to WDS. PATS test. Follow the instructions.
  1. If the cause is not visually evident, verify the symptom and refer to WDS to diagnose the system.

General Procedures > < Anti-Theft - Passive