Fault strategy for the rain sensor
Rain Sensor Fault 1 - Internal Fault Detected
This failure is detected when the wiper is in automatic mode and
the input faulty rain sensor from the rain sensor has a duty cycle corresponding
to Fault 1. The confirmation delay for the failure is of 1 sec.
When this failure is detected, the wiper outputs are OFF and the
wiper will also do a wipe in slow speed on the transition from sensitivity
3 to sensitivity 2 (Step 2 to 3) in order to signal the presence of
this fault. If another sensitivity is set, the wiper won’t make any
additional wipe.
Rain Sensor Fault 2 - Glass Attachment Fault Detected
This failure is detected when the wiper is in automatic mode and
the input faulty rain sensor from the rain sensor has a duty cycle corresponding
to Fault 2. The confirmation delay for the failure is of 1 s.
When this failure is detected, the wiper outputs are OFF and the
wiper will also do a wipe on the transition from sensitivity 4 to sensitivity
3 (Step 1 to 2) in order to signal the presence of this fault. If another
sensitivity is set, the wiper won’t make any additional wipe.
Rain Sensor Fault 3 - No Input Signal Present
This failure is detected when the wiper is in automatic mode and
the input faulty rain sensor from the rain sensor has a duty cycle corresponding
to Fault 3 or in case the duty cycle of the input faulty rain sensor
is 0% or 100%. The confirmation delay for the failure is of 1 s.
When this failure is detected, the wiper outputs are OFF.
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