초록 ▼

After an engine automatic stop processing is started, a diagnosis of a starter is started at a time of t1 when an engine speed drops to a diagnosis starting speed. Before the engine speed drops to the lower limit speed at which an engine can be restarted without being cranked by the starter, the dia

After an engine automatic stop processing is started, a diagnosis of a starter is started at a time of t1 when an engine speed drops to a diagnosis starting speed. Before the engine speed drops to the lower limit speed at which an engine can be restarted without being cranked by the starter, the diagnosis of the starter is conducted. In the diagnosis of the starter, it is determined whether the starter is faulty based on a current passing through the starter when a relay is turned off to stop energization of the starter before the starter actually rotates after the relay is turned on. Thereby, a malfunction of the starter can be detected before the engine is automatically stopped. It is avoided to automatically stop the engine which is incapable of being automatically restarted due to the malfunction of the starter.

대표청구항 ▼

What is claimed is: 1. A diagnosis device for a vehicle provided with a function of switching a relay provided between an actuator and an electric power supply to control an energization of the actuator, the diagnosis device comprising:a diagnosis means for determining whether the actuator is faulty

What is claimed is: 1. A diagnosis device for a vehicle provided with a function of switching a relay provided between an actuator and an electric power supply to control an energization of the actuator, the diagnosis device comprising:a diagnosis means for determining whether the actuator is faulty based on at least one of a voltage applied to the actuator and an electric current passing through the actuator, whereinthe relay is turned off before the actuator is actually operated after the relay has been turned on, andat least one of the voltage and the electric current is detected when the relay is turned off before the actuator is actually operated after the relay has been turned on.