本文发表在 rolia.net 枫下论坛Non-emissions Related Codes
The EPA revised OBD II test failure criteria require that a vehicle be failed for the presence of anyDiagnostic Trouble Code (DTC) that results in the MIL being commanded 'on'. Some reviewers felt that this change could result in vehicles being failed for non-emission-related components orsystems, such as the brakes or suspension. However, although some vehicle on-board computersmay monitor non-emission-related components and systems at the manufacturer's discretion, thefederal regulations in the USA require that the MIL only be illuminated for emission-relatedmalfunctions. (Sosnowski 2001)
Other dashboard lights may be illuminated to indicate the need for service of a non-emission-related component or system, but the presence of such lights does not constitute grounds for failingthe OBD-I/M check. Furthermore, the EPA claims to have examined data from over 300,000 OBD-I/M checks performed in actual I/M lanes and has not found a single instance of the simplified failure criteria leading to the failure of a vehicle for a non-emission-related component or system.(Sosnowski 2001)
The latest CARB and EPA OBD II information regulations require that manufacturers provide all Diagnostic Trouble Codes (DTCs) and the information for reprogramming of systems. Thisinformation must be published on individual Internet sites. (See Section 2.7.)
更多精彩文章及讨论,请光临枫下论坛 rolia.net
The EPA revised OBD II test failure criteria require that a vehicle be failed for the presence of anyDiagnostic Trouble Code (DTC) that results in the MIL being commanded 'on'. Some reviewers felt that this change could result in vehicles being failed for non-emission-related components orsystems, such as the brakes or suspension. However, although some vehicle on-board computersmay monitor non-emission-related components and systems at the manufacturer's discretion, thefederal regulations in the USA require that the MIL only be illuminated for emission-relatedmalfunctions. (Sosnowski 2001)
Other dashboard lights may be illuminated to indicate the need for service of a non-emission-related component or system, but the presence of such lights does not constitute grounds for failingthe OBD-I/M check. Furthermore, the EPA claims to have examined data from over 300,000 OBD-I/M checks performed in actual I/M lanes and has not found a single instance of the simplified failure criteria leading to the failure of a vehicle for a non-emission-related component or system.(Sosnowski 2001)
The latest CARB and EPA OBD II information regulations require that manufacturers provide all Diagnostic Trouble Codes (DTCs) and the information for reprogramming of systems. Thisinformation must be published on individual Internet sites. (See Section 2.7.)
更多精彩文章及讨论,请光临枫下论坛 rolia.net