BR16F84-1.07 ETC, BR16F84-1.07 Datasheet - Page 8

• Manufacturer Part Number: BR16F84-1.07
• Description: OBD II Interface Chip
• Manufacturer: ETC

Notes and updated information:
The above information is basically unchanged for later versions. Omissions, changes and errata are listed below.
Bus contention error message: This applies to PWM and VPW protocols only. If a bus contention occurs, the interface will
return a single byte (40 Hex). It is a control byte with the lower nibble set to zero, so no other bytes will follow. This indicates
the contention. This condition can normally occur when the vehicle's bus is busy with higher prioirity messages and the
diagnostic request looses arbitration.
PC Software should resend the original request message.