Behaviour For Normal State

Rain Sensing Wiping
If without the rain sensor option, the FAM can't receive Wiper Aut oSW from the multi function switch via CAN.

The FAM shall output the various modes according to the following.

No.	Wiper Mode	Duty Cycle
1	Off, MIST, INT, LOW or HIGH speed mode	6% +3/-2%
2	(Auto mode) Sensitivity 0 (Step 5)	12% +3/-2%
3	(Auto mode) Sensitivity 1 (Step 4)	18% +3/-2%
4	(Auto mode) Sensitivity 2 (Step 3)	24% +3/-2%
5	(Auto mode) Sensitivity 3 (Step 2)	30% +3/-2%
6	(Auto mode) Sensitivity 4 (Step 1)	36% +3/-2%
7	Washer mode	42% +3/-2%
8	(Auto mode) Sensitivity 4 (Step 1) with inwipe	66% +3/-2%
9	(Auto mode) Sensitivity 3 (Step 2) with inwipe	72% +3/-2%
10	(Auto mode) Sensitivity 2 (Step 3) with inwipe	78% +3/-2%
11	(Auto mode) Sensitivity 1 (Step 4) with inwipe	84% +3/-2%
12	(Auto mode) Sensitivity 0 (Step 5) with inwipe	90% +3/-2%
13	Sensor test mode (For TRW use only)	54% +3/-2%

OFF, MIST, LOW, and HIGH/Washer operation in Non AUTO mode.
MIST, LOW, and HIGH shall be interpreted as driver requested manual modes. The RAIN SENSOR output during these switch positions shall be an "Off" or "Rain Detected" duty cycle.
AUTO (Sensitivity 0 - 4)
One of five sensitivity switch positions will signal the RAIN SENSOR to operate in automatic mode. Sensitivity 0 refers to the least sensitive state (the slowest, step5) while Sensitivity 4 refers to the most sensitive state (the fast, step1).
WASHER (Washer operation only in AUTO mode by washer Switch)
WASHER signals the RAIN SENSOR that the Wash Paddle is being depressed and that the wiper system is going through a PROGRAMMED or DEMAND WASH cycle. The RAIN SENSOR output during this switch position is an "Off" or "Rain Detected" duty cycle. The RAIN SENSOR will ignore washer fluid spray.
In-wipe
The in-wipe signal specifies when received (Wiper Park Position) from ECW. In-wipe information is provided so the RAIN SENSOR can assure accurate delay times and smooth operation while in the automatic mode.

Rain Sensor to FAM
The Sensor shall output the various modes according to the following:
1. OFF
  OFF is the Sensor's request to the wiper controller to stop wiping.
2. Fault 1 - Internal Fault Detected
  Internal Fault Detected shall attempt to be asserted by the Sensor whenever an internal or onboard software or hardware fault is detected. This signal implies that, through on-board diagnostics, the Sensor has detected a problem within the Sensor module and, therefore, has little or no confidence in its' ability to function properly.
3. Fault 2 - Glass Attachment Fault Detected
  Glass Attachment Fault Detected is asserted when the Sensor module, through internal light intensity monitoring, detects an attachment problem between the Sensor and windshield.
4. Fault 3 - No Input Signal Present
  No Input Signal Present is asserted when the Sensor cannot detect a usable input signal from the wiper control for a minimum of 0.5 seconds.
5. Rain Detected
  Rain Detected shall be asserted in place of an OFF output in all modes when rain is detected and for 5 minutes following rain detection. Rain Detected is defined as when the internal Rain Intensity variable is greater 40.
6. Low Speed Request
  A Low Speed Request shall be asserted in the automatic mode when the Sensor determines that the wiper system should be operating in Low speed. A minimum of 5 consecutive output periods and not more than 10 shall be sent to request a single wipe (command wipe).
7. High Speed Request
  A High Speed Request shall be asserted in the automatic mode when the Sensor determines that the wiper system should be operating in High speed.
8. Sensitivity Performance
  Sensor sensitivity (ability to respond to various moisture accumulation conditions) performance shall meet the nominal wiper period.
9. Output Wipe Mode Smoothing/Response Time
  The Sensor processing algorithms shall contain smoothing characteristics that prevent erratic wipe transitions. Delay time changes, transitions between delay and continuous low speed, and transitions between continuous low speed and continuous high speed shall be smooth.