Mazda 6 Service Manual: Dtc b1869, b1870

Dtc b1342

Dtc b1871

Other materials:

Mazda 6 Service Manual: Idle air control (iac) valve inspection
Note Perform the following inspection only when directed. Operation Test Carry out the Idle Air Control Inspection. (See Idle Air Control System Inspection.) If not as specified, perform the further inspection for the IAC valve. Resistance Inspection 1. Disconnect the negative batt ...

Mazda 6 Service Manual: Intermittent concern troubleshooting
  Vibration Method 1. If malfunction occurs or becomes worse while driving on a rough road or when engine is vibrating, perform the steps below. Note There are several reasons vehicle or engine vibration could cause an electrical malfunction. Some of the things to check for are: ...