Windshield wiper assembly
From DDL Wiki
Failure Modes and Effects Analysis
| Item and Function | Failure Mode | Effects of Failure | S | Causes of Failure | O | Design Controls | D | RPN | Recommended Actions | Responsibility | Comments |
|---|---|---|---|---|---|---|---|---|---|---|---|
Motor connection link
| Loose connection | Little or no mechanical power transmitted to Link LN3 | 9 | Loosening of the motor connection nut due to vibrations in the motor | 4 | ||||||
Rubber Connections
| Corrosion | Doesn't connect other links and fails to transmit power to links | 6 | Tensile stress and chemical corrosion weakens the rubber with time | 3 | ||||||
Rubber Thermal Mount
| Corrosion | Does not mount properly in car; Fails to rotate the wiper arm | 7 | Overheating and use over time causes corrosion | 4 | ||||||
Cylindrical Rings
| Loss of grease | Causes grinding; Fails to rotate the wiper arm | 5 | Excessive use | 5 | ||||||
Hose
| Holes | Cause wiper fluid to leak and not reach the nozzle | 6 | Extreme temperature conditions can cause cracking; Foreign objects on windshield can puncture the hose | 9 | ||||||
Nozzle
| Chipping or breaking | Will not spray the wiper fluid onto the window | 6 | Foreign objects on windshield can break plastic; Over-stressing easily causes cracking | 9 | ||||||
Spring Connector
| Chipping or breaking | Does not secure spring thereby letting the wiper arms move away from the windshield | 7 | Foreign objects on windshield can break plastic; Over-stressing with taught spring causes cracking | 7 |
