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HOMESERVICE MANUALSFORD2005CROWN VICTORIA SPECIAL EDITIONREPAIR AND DIAGNOSISBODY & FRAMEDOOR LOCKSANTI-THEFT SYSTEMDIAGNOSIS AND TESTINGPASSIVE ANTI-THEFT SYSTEM (PATS) - PINPOINT TESTSPINPOINT TEST E: PATS TRANSCEIVER MODULE SIGNAL IS NOT RECEIVED

2005 Ford Crown Victoria Special Edition

Pinpoint Test E: PATS Transceiver Module Signal Is Not Received

2005 Ford Crown Victoria Special EditionSECTION Pinpoint Test E: PATS Transceiver Module Signal Is Not Received

E1 RETRIEVE THE DTCS
- Clear continuous DTCs.
- Key in OFF position.
- Key in ON position.
- Retrieve PCM continuous DTCs.
- Is DTC B1681 retrieved?
- Yes : GO to E2.
- No : The system is OK.
E2 CHECK THE TRANSCEIVER VOLTAGE CIRCUIT 1266 (RD/YE) FOR VOLTAGE
- Key in OFF position.
- Disconnect: PATS Transceiver C2007.
- Key in ON position.
- Measure the voltage between the PATS transceiver C2007-1, circuit 1266 (RD/YE), harness side and ground.
  
  Fig 1: Measuring Voltage Between PATS Transceiver C2007-1, Circuit 1266 (RD/YE), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to E3.
- No : REPAIR the supply circuit. CLEAR the DTCs. TEST the system for normal operation.
E3 CHECK THE PATS TRANSCEIVER GROUND CIRCUIT 676 (PK/OG) FOR GROUND
- Key in OFF position.
- Measure the resistance between the PATS transceiver C2007-2, circuit 676 (PK/OG), harness side and ground.
  
  Fig 2: Measuring Resistance Between PATS Transceiver C2007-2, Circuit 676 (PK/OG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to E4.
- No : REPAIR the circuit. CLEAR the DTCs. TEST the system for normal operation.
E4 CHECK THE PATS TRANSCEIVER RECEIVE CIRCUIT 1216 (GY/OG) FOR VOLTAGE
- Connect: PATS Transceiver C2007.
- Key in ON position.
- Measure the voltage by backprobing between the PATS transceiver U2007-4, circuit 1216 (GY/OG), harness side and ground.
  
  Fig 3: Measuring Voltage By Backprobing Between PATS Transceiver U2007-4, Circuit 1216 (GY/OG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 9 volts?
- Yes : GO to E6.
- No : GO to E5.
E5 CHECK THE PATS TRANSCEIVER RECEIVE CIRCUIT 1216 (GY/OG) FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: PATS Transceiver C2007.
- Measure the resistance between PATS transceiver C2007-4, circuit 1216 (GY/OG), harness side and ground.
  
  Fig 4: Measuring Resistance Between PATS Transceiver C2007-4, Circuit 1216 (GY/OG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to E6.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test. If the system fails again, GO to E13.
E6 CHECK CIRCUIT 1216 (GY/OG) FOR AN OPEN
- Key in OFF position.
- Disconnect: PATS Transceiver C2007.
- Disconnect: PCM C175b.
- Measure the resistance between the PATS transceiver C2007-4, circuit 1216 (GY/OG), harness side and PCM C175b-42, circuit 1216 (GY/OG), harness side.
  
  Fig 5: Measuring Resistance Between PATS Transceiver C2007-4, Circuit 1216 (GY/OG), Harness Side And PCM C175b-42, Circuit 1216 (GY/OG), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to E7.
- No : REPAIR the circuit. CLEAR the DTCs. TEST the system for normal operation.
E7 CHECK THE PATS TRANSCEIVER TRANSMIT CIRCUIT 1215 (WH/LG) FOR VOLTAGE
- Key in OFF position.
- Connect: PATS Transceiver C2007.
- Connect: PCM C175b.
- Key in ON position.
- Measure the voltage by backprobing between PATS transceiver C2007-3, circuit 1215 (WH/LG), harness side and ground.
  
  Fig 6: Measuring Voltage By Backprobing Between PATS Transceiver C2007-3, Circuit 1215 (WH/LG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 9 volts?
- Yes : GO to E11.
- No : GO to E8.
E8 CHECK THE PATS TRANSCEIVER TRANSMIT CIRCUIT 1215 (WH/LG) FOR A SHORT TO GROUND - TRANSCEIVER CONNECTED
- Key in OFF position.
- Disconnect: PCM C175b.
- Measure the resistance between PCM C175b-22, circuit 1215 (WH/LG), harness side and ground.
  
  Fig 7: Measuring Resistance Between PCM C175b-22, Circuit 1215 (WH/LG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to E10.
- No : GO to E9.
E9 CHECK THE PATS TRANSCEIVER TRANSMIT CIRCUIT 1215 (WH/LG) FOR A SHORT TO GROUND - TRANSCEIVER DISCONNECTED
- Disconnect: PATS Transceiver C2007.
- Measure the resistance between PATS transceiver C2007-3, circuit 1215 (WH/LG), harness side and ground.
  
  Fig 8: Measuring Resistance Between PATS Transceiver C2007-3, Circuit 1215 (WH/LG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : INSTALL a new PATS transceiver. REFER to PASSIVE ANTI-THEFT SYSTEM (PATS) TRANSCEIVER in this article. CLEAR the DTCs. REPEAT the self-test.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
E10 CHECK THE PATS TRANSMIT CIRCUIT 1215 (WH/LG) FOR AN OPEN
- Disconnect: PATS Transceiver C2007.
- Measure the resistance between PATS transceiver C2007-3, circuit 1215 (WH/LG), harness side and PCM C175b-22, circuit 1215 (WH/LG), harness side.
  
  Fig 9: Measuring Resistance Between PATS Transceiver C2007-3, Circuit 1215 (WH/LG), Harness Side And PCM C175b-22, Circuit 1215 (WH/LG), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to E13.
- No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
E11 CHECK THE TRANSCEIVER TRANSMIT CIRCUIT 1215 (WH/LG) FOR VOLTAGE
- Key in ON position.
- Select PCM active command TRANSMIT SIGNAL COMMAND.
- Trigger RF to ON.
- Measure the voltage by backprobing between PATS transceiver C2007-3, circuit 1215 (WH/LG), harness side and ground.
  
  Fig 10: Measuring Voltage By Backprobing Between PATS Transceiver C2007-3, Circuit 1215 (WH/LG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage less than 5 volts?
- Yes : INSTALL a new PATS transceiver. REFER to PASSIVE ANTI-THEFT SYSTEM (PATS) TRANSCEIVER in this article. CLEAR the DTCs. REPEAT the self-test.
- No : GO to E12.
E12 CHECK THE PATS TRANSCEIVER TRANSMIT CIRCUIT FOR A SHORT TO BATTERY
- Key in OFF position.
- Disconnect: PCM C175b.
- Disconnect: PATS Transceiver C2007.
- Key in ON position.
- Measure the voltage between PATS C2007-3, circuit 1215 (WH/LG), harness side and ground.
  
  Fig 11: Measuring Voltage Between PATS C2007-3, Circuit 1215 (WH/LG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is voltage present?
- Yes : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
- No : GO to E13.
E13 CHECK FOR CORRECT PCM OPERATION
NOTE: When a new PCM is installed, the encoded ignition keys must be reprogrammed.
- Disconnect all the PCM connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the PCM 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 PCM. REFER to ELECTRONIC ENGINE CONTROLS .
  PROGRAM the encoded ignition keys. REFER to KEY PROGRAMMING USING DIAGNOSTIC EQUIPMENT in this article. CLEAR the DTCs. 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. REPEAT the self-test.