Boots – shoes – and leggings
Patent
1994-06-14
1995-12-26
Chilcot, Jr., Richard B.
Boots, shoes, and leggings
36442403, 731181, G01M 1500
Patent
active
054793475
ABSTRACT:
In a vehicle diagnosis system in which a diagnosis unit is connected to a control unit, the control unit determines whether or not there is a code read request from the diagnosis unit. When there is the request, it further determines whether or not code erase is in execution. When code erase is not in execution, an abnormality code stored in the standby RAM region of its CPU is searched for and the result is transmitted to the diagnosis unit. When code erase is in execution, on the other hand, the data after code erase (no abnormality code) is transmitted to the diagnosis unit. Thus, during code erase operation, the abnormality data before erase is prevented from being transmitted to the diagnosis unit.
Further, in case of a RAM value read request is made from a main CPU to other CPU in the controller, it is checked whether a requested address value from the main CPU to the other CPU agrees with the address value transmitted from the other CPU to the main CPU. When the address values agree, the flag XA4ANS is set. After a prescribed interval from this flag setting, the RAM value corresponding to the requested address are responsively sent out to the diagnosis unit. Therefore, transmission of erroneous information to the diagnosis unit can be prevented without fail.
REFERENCES:
patent: 4748843 (1988-06-01), Schafer
patent: 4926352 (1990-05-01), Staffe
patent: 5050080 (1991-09-01), Abe
patent: 5276619 (1994-01-01), Ohara et al.
patent: 5325082 (1994-06-01), Rodriguez
Iwai Akihito
Oguro Hirokazu
Takaba Katsumi
Chilcot, Jr. Richard B.
Nippondenso Co. Ltd.
Noori Max H.
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