LEMON Manuals: Even more car manuals for everyone
Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 585 (Parking Aid System) >> Diagnosis And Testing >> Parking Aid >> Pinpoint Tests >> Pinpoint Test F: DTC C1742 and C1743 Rear Sounder Circuit Failure/Short To Battery >> Pinpoint Test F: DTC C1742 And C1743 Rear Sounder Circuit Failure/Short To Battery

Pinpoint Test F: DTC C1742 And C1743 Rear Sounder Circuit Failure/Short To Battery

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
  1. F1 CHECK THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCs) FROM BOTH THE CONTINUOUS AND ON-DEMAND SELF-TESTS 
    • Check the recorded parking aid module DTCs from the continuous and on-demand self-tests.
    • Is DTC C1742 or C1743 recorded? 

    Yes:  GO to  F2.

    No:  All other DTCs, REFER to the PARKING AID MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX .

    If no DTCs are recorded, GO to PINPOINT TEST B .

  2. F2 MEASURE THE PARKING AID SPEAKER RESISTANCE 
    • 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 & Parking Aid Speaker Pin 2 Component Side
    G04658178Courtesy of FORD MOTOR CO.
    • Is the resistance between 40 and 60 ohms? 

    Yes:  If DTC C1742 was recorded, GO to  E3.

    If DTC C1743 was recorded, GO to  E7.

    No:  INSTALL a new parking aid speaker. REFER to PARKING AID MODULE . CLEAR the DTCs. REPEAT the self-test.

  3. F3 CHECK CIRCUIT 1437 (BK/PK) FOR A SHORT TO GROUND 
    • Connect: Parking Aid Speaker C3268.
    • Disconnect: Parking Aid Module C3267.
    • Measure the resistance between the parking aid module C3267-2, circuit 1437 (BK/PK), harness side and ground.
    Fig 2: Measuring Resistance Between Parking Aid Module C3267-2, Circuit 1437 (BK/PK), Harness Side & Ground
    G04658179Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 

    Yes:  GO to  F5.

    No:  GO to  F4.

  4. F4 CHECK CIRCUIT 1437 (BK/PK) FOR A SHORT TO GROUND WITH THE PARKING AID SPEAKER DISCONNECTED 
    • Disconnect: Parking Aid Speaker C3268.
    • Measure the resistance between the parking aid module C3267-2, circuit 1437 (BK/PK), harness side and ground.
    Fig 3: Measuring Resistance Between Parking Aid Module C3267-2, Circuit 1437 (BK/PK), Harness Side & Ground
    G04658180Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 

    Yes  : REPAIR circuit 1438 (DG). CLEAR the DTCs. REPEAT the self-test.

    No  : REPAIR circuit 1437 (BK/PK). CLEAR the DTCs. REPEAT the self-test.

  5. F5 CHECK CIRCUIT 1437 (BK/PK) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Parking Aid Speaker C3268.
    • Measure the resistance between the parking aid module C3267-2, circuit 1437 (BK/PK), harness side and the parking aid speaker C3268-2, circuit 1437 (BK/PK), harness side.
    Fig 4: Measuring Resistance Between Parking Aid Module C3267-2, Circuit 1437 (BK/PK), Harness Side & Parking Aid Speaker C3268-2, Circuit 1437 (BK/PK), Harness Side
    G04658181Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes:  GO to  F6.

    No:  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  6. F6 CHECK CIRCUIT 1438 (DG) FOR AN OPEN 
    • Measure the resistance between the parking aid module C3267-6, circuit 1438 (DG), harness side and the parking aid speaker C3268-1, circuit 1438 (DG), harness side.
    Fig 5: Measuring Resistance Between Parking Aid Module C3267-6, Circuit 1438 (DG), Harness Side & Parking Aid Speaker C3268-1, Circuit 1438 (DG), Harness Side
    G04658182Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 

    Yes:  GO to  F8.

    No:  REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

  7. F7 CHECK THE PARKING AID SPEAKER CIRCUITRY FOR SHORTS TO VOLTAGE 
    • Key in ON position.
    • Disconnect: Parking Aid Module C3267.
    • Measure the voltage between the parking aid module circuit 1437 (BK/PK), harness side and ground; and between the parking aid module C3267-6, circuit 1438 (DG), harness side and ground.
    Fig 6: Measuring Voltage Between Parking Aid Module Circuit 1437 (BK/PK), Harness Side & Ground
    G04658183Courtesy of FORD MOTOR CO.
    • Is any voltage present? 

    Yes:  REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.

    No:  GO to  F8.

  8. F8 CHECK FOR CORRECT PARKING AID MODULE OPERATION 
    • Disconnect the parking aid module connector.
    • Check for:
    • corrosion
    • pushed-out pins
    • Connect the parking aid module 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 parking aid module. REFER to PARKING AID MODULE . 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. REPEAT the self-test.

scientia non olet · About LEMON Manuals