Silhouette V6-3.4L VIN E (1996)
Compass: Initial Inspection and Diagnostic Overview
Circuit Operation - with Temperature Display
COMPASS DISPLAY
The compass display circuitry is entirely contained within the Driver Information Display. Check for compass self-calibration function.
TEMPERATURE DISPLAY
The Driver Information Display applies voltage to the Outside Air Temperature Sensor. The Outside Air Temperature Sensor is a thermistor; as
temperature increases its resistance decreases and as temperature decreases its resistance increases. As the resistance of the Outside Air
Temperature Sensor increases, the Driver Information Display senses a larger voltage drop across the Outside Air Temperature Sensor, indicating
a lower temperature. As the resistance of the Outside Air Temperature Sensor decreases, the Driver Information Display senses a smaller voltage
drop across the Outside Air Temperature Sensor, indicating a higher temperature.
The Driver Information Display uses the vehicle speed signal from the powertrain Control Module to determine when to update the temperature
display with a new outside air temperature reading. The vehicle must be driven over 30 km/h (18 mph) before the temperature display will be
updated.
Troubleshooting Hints - with Temperature Display
1. Check for missing or damaged connector seal at the Outside Air Temperature Sensor.
2. If "SC" or "OC" appears in the temperature display during operation, see the Symptom Table.
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Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a
continuity/voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be
checked by monitoring for a voltage drop with the system operational (under load).
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Check for proper installation of after market electronic equipment which may affect the integrity of other systems (refer to General
Troubleshooting Procedures). See: Diagrams/Diagnostic Aids
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Refer to System Diagnosis.
