OBD II Fault Code B1200 :

Description of Fault code B1200

Communication bus line (BUS-OFF)
When the Bus is cut off, all of the signal transmissions of B-CAN line are stopped, and multiple DTCs, indicating communication error between units, are stored at the same time. When DTCs, indicating Bus off, are stored, be sure to perform the troubleshooting for Bus off first.

Possible failuer B1200

Climate Control Unit

Diagnostic Procedure using AutoHex II Scan Tool

• The built-in diagnostic data in the EEPROM internal conflicts.
• Reading the data from the EEPROM is abnormal.
• Writing the data from the EEPROM is abnormal.
• When the message of the EEPROM is judged as wrong, the predetermined alternative value is output.

Test Conditions using AutoHex tester

• During the access to the EEPROM

Clear Fault codes Conditions

• The built-in diagnostic data in the EEPROM internal conflicts.
• Reading the data from the EEPROM is abnormal.
• Writing the data from the EEPROM is abnormal.
• When the message of the EEPROM is judged as wrong, the predetermined alternative value is output.

MIL Status

• Check Engine Light ON

Note:

• AutoHex II is a professional Auto diagnostic.
• This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
  To get the accurate fault code description you may use AutoHex II

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