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Electronic Compass System Ford Crown Victoria II

Navigation System 13 illustrations ~626 words

The compass display and module are contained in the overhead console. The compass display can be turned off and on by pressing the MODE button in the overhead console. The vehicle heading is displayed as one of N, NE, E, SE, S, SW, W, or NW.

Compass Accuracy

Driving near power lines, or driving in the area of large iron or steel structures can temporarily change the compass heading. If the compass remains inaccurate after driving near such objects, demagnetize the vehicle and recalibrate the compass.

Most geographic areas (zones) have a magnetic north compass point that varies slightly from the northerly direction on maps. This variation is four degrees between the adjacent zones and will become noticeable as the vehicle crosses multiple zones. A correct zone setting eliminates the error. Refer to COMPASS ZONE ADJUSTMENT .

Refer to SYSTEM WIRING DIAGRAMS for schematic and connector information.

Scheme 1

Scheme 1: Electronic Compass
Scheme 1: Electronic Compass

Inspection and Verification

Note. Press the MODE button to turn on the display.

Scheme 2

Scheme 2: Inspection and Verification
Scheme 2: Inspection and Verification
  1. Verify the customer concern by operating the vehicle along roads of known direction to duplicate the customer concern with the compass.
  2. Visually inspect for obvious signs of mechanical or electrical damage.
  3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  4. If the fault is not visually evident, determine the symptom and proceed to the Symptom Chart.

Scheme 3

Scheme 3: Symptom Chart
Scheme 3: Symptom Chart

Scheme 4

Scheme 4: PINPOINT TEST A: THE COMPASS IS INACCURATE/INOPERATIVE
Scheme 4: PINPOINT TEST A: THE COMPASS IS INACCURATE/INOPERATIVE

Scheme 5

Scheme 5
Scheme 5

Scheme 6

Scheme 6: PINPOINT TEST B: THE DISPLAY IS INOPERATIVE
Scheme 6: PINPOINT TEST B: THE DISPLAY IS INOPERATIVE

Scheme 7

Scheme 7: PINPOINT TEST C: THE DISPLAY IS LOCKED IN ONE POSITION
Scheme 7: PINPOINT TEST C: THE DISPLAY IS LOCKED IN ONE POSITION

Scheme 8

Scheme 8: PINPOINT TEST D: THE DISPLAY WILL NOT DIM WITH INSTRUMENT PANEL DIMMER SWITCH
Scheme 8: PINPOINT TEST D: THE DISPLAY WILL NOT DIM WITH INSTRUMENT PANEL DIMMER SWITCH

Scheme 9

Scheme 9: Compass Zone Adjustment
Scheme 9: Compass Zone Adjustment
  1. Refer to the compass calibration zone map to select the correct compass zone setting for your geographical location.
  2. Press and hold the MODE button until VAR appears on the display. Release the MODE button.
  3. Momentarily press the MODE button to increase the zone increment by one. Set the zone according to the map.

Compass Calibration

  1. Start the vehicle.
  2. Press and hold the MODE button until CAL appears in the display, then release the MODE button.
  3. Drive the vehicle slowly (less then 5 km/h [3 mph]) in complete circles until CAL disappears from the display.

Vehicle Demagnetizing

CAUTIONDuring demagnetizing, the demagnetizer coil will be pulled toward the vehicle. Place a cloth over the vehicle roof to protect the vehicle surface if contact occurs. Make sure the cloth covers the front third and the entire width of the roof.

Note. The demagnetizing process requires the use of a demagnetizing coil commonly used by television repair technicians to demagnetize television tubes.

Note. To demagnetize, use a constant circular motion over the vehicle roof. Do not turn off the demagnetizer while sweeping the vehicle roof to prevent remagnetizing ferrous materials contained in the vehicle.

Note. During the demagnetizing process, make sure the phenolic surface of the tool (the side opposite the handle) is closest to the vehicle surface.

  1. Demagnetize the front third of the vehicle roof. Turn on the demagnetizer at least 1 meter (3 ft) away from the vehicle. Holding the demagnetizer no more than 2.5 cm (1 in) from the roof and starting on the passenger side, demagnetize the front third of the roof closest to the windshield using a constant circular motion. Keep the circle's radius within 30 cm (12 in) while sweeping across the entire surface of the roof closest to the windshield. Continue the circular motion four times. After the fourth pass and without stopping, move the demagnetizer at least 1 meter (3 ft) away from the vehicle. Turn the demagnetizer off.
  2. Carry out the calibration adjustment procedure; refer to «COMPASS CALIBRATION»(/ford/crown-victoria/ii-1997-2011/remont/navigation-system/#electronic-compass-system__compass-calibration) .

Scheme 10

Scheme 10: Removal and Installation
Scheme 10: Removal and Installation

Scheme 11

Scheme 11
Scheme 11

Scheme 12

Scheme 12
Scheme 12

Scheme 13

Scheme 13
Scheme 13
  1. Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(/ford/crown-victoria/ii-1997-2011/remont/charging-system/#battery-mounting-and-cables) .
  2. Remove the screw.
  3. Open the storage compartment and remove the two screws.
  4. Remove the overhead console. Disconnect the electrical connectors.
  5. Remove the screws.
  6. Disconnect the electrical harness connector and remove the switches and the harness from the compass module.
  7. To install, reverse the removal procedure.