Self Diagnosis

SELF-DIAGNOSIS

1. Rain sensor has 3 types of self-diagnosis test mode as follows.

1. FAULT 1 self diagnosis
When the error is detected in inside, software or hardware, error is always expressed in terms of rain sensor This signal detects the problem of sensor module.

2. FAULT 2 self diagnosis
If the rain sensor servo operating point is above the predetermined one by the software, it means FAULT A. This phenomenon occurs if the windshield glass is damaged where coupler is installed, or sensor is removed from the coupler.

3. FAULT 3 self diagnosis
Rain sensor shows that input signal is not detected from rain sensor to BCM at least for 0.5 second. Wiper does not operate without input signal It cannot be known by the INT volume sensitivity adjustment.

NOTE: In the auto mode, wiper continues to operate in the same mode even if sensor detects the input signal, but it stops operation when turned off.

2. Types of failures when INT volume sensitivity is adjusted.
Following is the self-diagnosis by the sensitivity adjustment and wiper motion

1. Wiper switch sets the INT volume sensitivity to 1st level in IGN ON and AUTO position.
2. Shift the sensitivity from 1 to 2 in this condition.
3. If wiper operates once, then it is in FAULT 2 self-diagnosis In service shop, check the windshield glass for the damage and rain sensor for its installation
4. Shift the sensitivity from 2 to 3 after checking the above mentioned 3).
5. If the wiper operates once, then it is in FAULT 1 self diagnosis, and the rain sensor should be replaced with new one.