Patent ID: 8044614

Claim:
A control method for a wiper apparatus comprising a first motor that is drive-controlled by a first control circuit, a first wiper blade that is driven by the first motor, a second motor that is drive-controlled by a second control circuit that is connected to the first control circuit through an intermediation of a communication line, and a second wiper blade driven by the second motor, wherein, in a normal operation of the first and second wiper blades, in a case of wiping from lower turning positions of wiped areas to be wiped by the first and second wiper blades to upper turning positions of the wiped areas, the first wiper blade wipes the wiped area ahead of the second wiper blade, and in a case of wiping from the upper turning positions to the lower turning positions, the second wiper blade wipes the wiped area in a position relationship of going ahead of the first wiper blade, the control method for a wiper apparatus comprising: stopping the second wiper blade after the second wiper blade reaches the lower turning position when the communication abnormality occurs between the first control circuit and the second control circuit in a case where the position relationship between the first and second wiper blades is in a state of the normal operation; and stopping the second wiper blade after the second wiper blade reaches the upper turning position when the communication abnormality occurs between the first control circuit and the second control circuit in a case where the position relationship between the first and second wiper blades differs from the position relationship in the state of the normal operation.