Pre-Check

1. RAIN DROP SENSING WIPER OPERATION CHECK
a. Check that wiper operates properly in INT, LO, HI mode depending on the amount of rain drop on windshield glass when wiper switch AUTO.

2. FAIL SAFE FUNCTION
a. Wiper operates intermittently depending on the sensitivity control position in wiper switch "AUTO" on the following condition.
1. Rain sensor temperature is less than -10 degrees.
2. Rain sensor temperature is more than 80 degrees.
3. Rain sensor malfunction.