Note On Intermittents
If an intermittent DTC B119 is being set, manipulate the related wiring while observing BCM data value BD44. If the failure is induced, the reading will jump from its normal value to a reading outside the range of 3 to 98%.
NOTE:
The following numbered steps refer to circled numbers on diagnostic chart. See Fig 1
. For circuit identification, see Fig 2
.
- BCM data value BD44 displays light level. The normal range is from 3 to 98%.
- Check to see if the open circuit reading is due to the circuit or the sensor. If the open circuit reading changes to a shorted circuit reading after jumpering the sensor terminals, the BCM and wiring are OK.
- By applying a ground to various points in the circuits, an open can be isolated by observing whether the parameter display can be changed from the open reading to the shorted reading.
- Check to see if the shorted circuit reading is due to the circuit or the sensor. If the shorted circuit reading changes to an open circuit reading after disconnecting the sensor, the BCM and wiring are OK.