Note On Intermittents

If an intermittent Code F15 is being set, manipulate related wiring while observing BCM data parameter P.3.2. If failure is induced, reading will jump from normal reading to a reading outside of normal operating range. An open circuit may produce a count of 255; a short to ground may produce a count of zero.

Fig 1: BCM Code F15 Schematic - Solar Sensor Circuit Failure

Courtesy of GENERAL MOTORS CORP.

Fig 2: BCM Code F15 Flow Chart - Solar Sensor Circuit Failure

Courtesy of GENERAL MOTORS CORP.