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Pinpoint Test F: DTC C1742 Or DTC C1743

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. F1 RETRIEVE THE DTCs FROM PAM THE SELF-TEST 
    • Retrieve the PAM  DTCs from the self-test.
    • Is DTC C1742 or DTC C1743 present? 
    • Yes:  GO to F2  .
    • No:  For all other DTCs REFER to DTC CHARTS .
  2. F2 MEASURE THE PARKING AID SPEAKER RESISTANCE 
    • Ignition OFF.
    • Disconnect: Parking Aid Speaker C3268.
    • Measure the resistance between the parking aid speaker pin 1, component side and the parking aid speaker pin 2, component side.
      Fig 1: Measuring Resistance Between Parking Aid Speaker Pin 1, Component Side And Parking Aid Speaker Pin 2, Component Side
      G06098928Courtesy of FORD MOTOR CO.
    • Is the resistance between 40 and 60 ohms? 
    • Yes:  If DTC C1742 was recorded, GO to F3  .

      If DTC C1743 was recorded, GO to  F8.

    • No:  INSTALL a new parking aid speaker. REFER to PARKING AID SPEAKER . CLEAR the DTCs. TEST the system for normal operation.
  3. F3 MEASURE THE PARKING AID SPEAKER CIRCUITS FOR A SHORT TOGETHER 
    • Measure the resistance between the parking aid speaker C3268-2, circuit CMP09 (BN/BU), harness side and the parking aid speaker C3268-1, circuit RMP09 (BU/GN), harness side.
      Fig 2: Measuring Resistance Between Parking Aid Speaker C3268-2, Circuit CMP09 (BN/BU) And Parking Aid Speaker C3268-1, Circuit RMP09 (BU/GN)
      G06098928Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to F4  .
    • No:  REPAIR the circuit. CLEAR the DTCs. TEST the system for normal operation.
  4. F4 CHECK THE PARKING AID SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND 
    • Connect: Parking Aid Speaker C3268.
    • Disconnect: PAM  C4014.
    • Measure the resistance between the PAM  C4014-2, circuit CMP09 (BN/BU), harness side and ground.
      Fig 3: Checking Circuit RMP09 Or CMP09
      G06075428Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  GO to  F6.
    • No:  GO to F5  .
  5. F5 CHECK THE PARKING AID SPEAKER (+) CIRCUIT FOR A SHORT TO GROUND WITH THE PARKING AID SPEAKER DISCONNECTED 
    • Disconnect: Parking Aid Speaker C3268.
    • Measure the resistance between the PAM  C4014-2, circuit CMP09 (BN/BU), harness side and ground.
      Fig 4: Checking Circuit RMP09 Or CMP09
      G06075428Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes:  REPAIR circuit RMP09 (BU/GN). CLEAR the DTCs. TEST the system for normal operation.
    • No:  REPAIR circuit CMP09 (BN/BU). CLEAR the DTCs. TEST the system for normal operation.
  6. F6 CHECK THE PARKING AID SPEAKER (+) CIRCUIT FOR AN OPEN 
    • Disconnect: Parking Aid Speaker C3268.
    • Measure the resistance between the PAM  C4014-2, circuit CMP09 (BN/BU), harness side and the parking aid speaker C3268-2, circuit CMP09 (BN/BU), harness side.
      Fig 5: Measuring Resistance Between PAM C4014-2, Circuit CMP09 (BN/BU) And Parking Aid Speaker C3268-2, Circuit CMP09 (BN/BU)
      G06075430Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to F7  .
    • No:  REPAIR the circuit. CLEAR the DTCs. TEST the system for normal operation.
  7. F7 CHECK THE PARKING AID SPEAKER (-) CIRCUIT FOR AN OPEN 
    • Measure the resistance between the PAM  C4014-6, circuit RMP09 (BU/GN), harness side and the parking aid speaker C3268-1, circuit RMP09 (BU/GN), harness side.
      Fig 6: Measuring Resistance Between PAM C4014-6, Circuit RMP09 (BU/GN) And Parking Aid Speaker C3268-1, Circuit RMP09 (BU/GN)
      G06075437Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes:  GO to F8  .
    • No:  REPAIR the circuit in question. CLEAR the DTCs. TEST the system for normal operation.
  8. F8 CHECK THE PARKING AID SPEAKER CIRCUITRY FOR SHORTS TO VOLTAGE 
    • Ignition ON.
    • Measure the voltage between the PAM  C4014-2, circuit CMP09 (BN/BU), harness side and ground; and between the PAM  C4014- 6, circuit RMP09 (BU/GN), harness side and ground.
      Fig 7: Measuring Voltage Between PAM C4014-2, Circuit CMP09 (BN/BU) And Ground
      G06075438Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes:  REPAIR the circuit in question. CLEAR the DTCs. TEST the system for normal operation.
    • No:  GO to F9  .
  9. F9 CHECK FOR CORRECT PAM OPERATION 
    • Disconnect the PAM  connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the PAM  connector and make sure it seats correctly.
    • Operate the system and determine if the concern is still present.
    • Is the concern still present? 
    • Yes:  INSTALL a new PAM  . REFER to PARKING AID MODULE (PAM) . TEST the system for normal operation.
    • No:  The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.
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