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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1616 (Parking Aid System) >> Diagnostic Tests >> Parking Aid >> Pinpoint Tests >> Pinpoint Test E: The Parking Aid Is Inoperative - Cannot Be Disabled

Pinpoint Test E: The Parking Aid Is Inoperative - Cannot Be Disabled

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

Refer to appropriate SYSTEM WIRING DIAGRAMS article, Parking Aid for schematic and connector information.

Normal Operation 

The parking aid system is disabled if any fault is detected. Circuit 1436 (VT/OG) supplies voltage to the instrument cluster (IC) message center indicating that the parking aid system is operational. If there is an active DTC, the parking aid module (PAM) removes the voltage from circuit 1436 (VT/OG) causing the IC message center to display PARK AID OFF.

The parking aid system is also disabled when the operator selects PARK AID OFF through the message center. A constant voltage signal is supplied to the PAM by the IC message center on circuit 1435 (DG/VT). When the operator disables the parking aid system through the message center, circuit 1435 (DG/VT) is momentarily grounded, by the message center, which changes the operational state of the PAM to disabled.

This pinpoint test is intended to diagnose the following:

PINPOINT TEST E: THE PARKING AID IS INOPERATIVE - CANNOT BE DISABLED 

CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Diagnostic measurements are made at the parking aid system inline harness connector located in the luggage compartment, forward of the LH tail light assembly.
  1. E1 CHECK THE RECORDED DTCs FROM PAM SELF-TEST 
    • Check the recorded DTCs from the PAM self-test.
    • Are any DTCs recorded? 
    1. YES  : REFER to DTC Index .
    2. NO  : Go to  E2.
  2. E2 CHECK CIRCUIT 1435 (DG/VT) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Parking Aid System Inline Harness C406
    • Disconnect: IC C220
      • Fig 1: Checking Circuit For An Open
      GF0018983Courtesy of FORD MOTOR CO.
    • Measure the resistance between the IC C220-25, circuit 1435 (DG/VT), body harness side and the parking aid system inline harness C406-2, circuit 1435 (DG/VT), body harness side.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  E3.
  3. E3 CHECK CIRCUIT 1436 (VT/OG) FOR A SHORT TO VOLTAGE 
    • Key in ON position.
      • Fig 2: Checking Circuit For Short To Voltage
      GF0018984Courtesy of FORD MOTOR CO.
    • Measure the voltage between the parking aid system inline harness C406-8, circuit 1436 (VT/OG), body harness side and ground.
    • Is any voltage indicated? 
    1. YES  : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
    2. NO  : Go to  E4.
  4. E4 CHECK THE PARKING AID SYSTEM INLINE HARNESS 
    • Inspect the parking aid system inline harness for an open, short to voltage, or a short to ground.
    • Is the parking aid system inline harness OK? 
    1. YES  : Go to  E5.
    2. NO  : INSTALL a new or REPAIR the parking aid system inline harness. TEST the system for normal operation.
  5. E5 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 (PAM) . 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.
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