LEMON Manuals: Even more car manuals for everyone
Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1163 (Parking Aid) >> Diagnostic Tests >> Parking Aid >> Pinpoint Tests >> Pinpoint Test E: DTC C1742 and C1743 - Rear Sounder Circuit Short To Vbatt & Rear Sounder Circuit Failure >> Pinpoint Test E: DTC C1742 - Rear Sounder Circuit Failure And C1743 - Rear Sounder Circuit Short To VBATT

Pinpoint Test E: DTC C1742 - Rear Sounder Circuit Failure And C1743 - Rear Sounder Circuit Short To VBATT

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. E1 CHECK THE RECORDED DTCs FROM BOTH THE CONTINUOUS AND ON-DEMAND SELF-TESTS 
    • Check the recorded PAM DTCs from the continuous and on-demand self-tests.
    • Are any PAM DTCs recorded? 
    1. YES  : For DTC C1742, go to  E2.

      For DTC C1743, go to  E7.

      For all others DTCs, REFER to DTC Charts .

    2. NO  : Go to Pinpoint Test A .
  2. E2 MEASURE THE PARKING AID SPEAKER RESISTANCE 
    • Disconnect: Parking Aid Speaker C2024
      • Fig 1: Measuring Parking Aid Speaker Resistance
      GF0004510Courtesy of FORD MOTOR CO.
    • Measure the resistance between the parking aid speaker pin 1, component side and the parking aid speaker pin 2, component side.
    • Is the resistance between 40 and 60 ohms? 
    1. YES  : If DTC C1742 was recorded, go to  E3.

      If DTC C1743 was recorded, go to  E7.

    2. NO  : INSTALL a new parking aid speaker. REFER to Parking Aid Module . CLEAR the DTCs. REPEAT the self-test.
  3. E3 CHECK CIRCUIT 1437 (BK/PK) FOR A SHORT TO GROUND 
    • Connect: Parking Aid Speaker C2024
    • Disconnect: PAM C2023
    • Measure the resistance between the PAM C2023-2, circuit 1437 (BK/PK), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : Go to  E5.
    2. NO  : Go to  E4.
  4. E4 CHECK CIRCUIT 1437 (BK/PK) FOR A SHORT TO GROUND WITH THE PARKING AID SPEAKER DISCONNECTED 
    • Disconnect: Parking Aid Speaker C2024
    • Measure the resistance between the PAM C2023-2, circuit 1437 (BK/PK), harness side and ground.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : REPAIR circuit 1438 (DG). CLEAR the DTCs. REPEAT the self-test.
    2. NO  : REPAIR circuit 1437 (BK/PK). CLEAR the DTCs. REPEAT the self-test.
  5. E5 CHECK CIRCUIT 1437 (BK/PK) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Parking Aid Speaker C2024
      • Fig 2: Checking Circuit 1437 (BK/PK) For An Open
      GF0004511Courtesy of FORD MOTOR CO.
    • Measure the resistance between the parking aid speaker C2024-2, circuit 1437 (BK/PK), harness side and the PAM C2023-2, circuit 1437 (BK/PK), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  E6.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  6. E6 CHECK CIRCUIT 1438 (DG) FOR AN OPEN 
      Fig 3: Checking Circuit 1438 (DG) For An Open
      GF0004512Courtesy of FORD MOTOR CO.
    • Measure the resistance between the parking aid speaker C2024-1, circuit 1438 (DG), harness side and the PAM C2023-6, circuit 1438 (DG), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  E8.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
  7. E7 CHECK THE PARKING AID SPEAKER CIRCUITS FOR SHORTS TO VOLTAGE 
    • Key in ON position.
      • Fig 4: Checking Parking Aid Speaker Circuits For Shorts To Voltage
      GF0004513Courtesy of FORD MOTOR CO.
    • Measure the voltage between the PAM C2023-2, circuit 1437 (BK/PK), harness side and ground; and between the PAM C2023-6, circuit 1438 (DG), harness side and ground.
    • Is any voltage present? 
    1. YES  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  E8.
  8. E8 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? 
    1. YES  : INSTALL a new PAM. REFER to Parking Aid Module . TEST the system for normal operation.
    2. 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.
scientia non olet · About LEMON Manuals