| 摘要 |
PROBLEM TO BE SOLVED: To provide a relay failure detecting apparatus capable of reducing error detection of failures due to relay contact failures, etc. SOLUTION: A driving force distribution control device 42 performs on-off drive on a relay 51 and detects open failures of the relay 51 when the relay 51 is on. The relay 51 is intermittently and repeatedly turned on and off a plurality of times. At this time, a microcomputer 50 determines a relay failure when a power supply voltage VB including the relay 51 is less than an open failure check voltage threshold value VL even if the number of times of the retrying of the relay 51 (the number of times by which the relay 51 is turned on) exceeds two times.
|
