Patent ID: 7397148

Claim:
An anomaly diagnosis system provided in a vehicle having an internal combustion engine and a component having an operative relationship with the engine, the anomaly diagnosis system comprising: warming-up means for executing warming-up of at least one of the engine and the component; pre-start state detecting means for detecting a pre-start state by detecting a preparation operation for a start of the engine, wherein the warming-up means executes the warming-up prior to the start of the engine when the pre-start state detecting means detects the pre-start state; anomaly detecting means for detecting an anomaly of the pre-start state detecting means; and vehicle state detecting means for detecting a vehicle state, wherein the pre-start state detecting means detects the pre-start state based on a given signal, the anomaly detecting means detects the anomaly of the pre-start state detecting means based on the given signal and the vehicle state detected by the vehicle state detecting means, the pre-start state detecting means detects the pre-start state based on an ON-signal or an OFF-signal of a driver seat switch as the given signal, wherein the ON-signal or OFF-signal of the driver seat switch indicates whether a driver is seated on a driver seat or not, respectively, and in a case where the OFF-signal of the driver seat switch is not detected and when it is detected that the driver retires from the vehicle, the anomaly detecting means detects an anomaly of the pre-start state detecting means.