

Diagnostic procedure


Dtc p0340
Dtc p0420Mazda 6 Service Manual: Shroud panel removal/installation
1. Remove the bonnet. (See BONNET REMOVAL/INSTALLATION.)
2. Remove the front bumper. (See FRONT BUMPER REMOVAL/INSTALLATION.)
3. Remove the front combination light. (See FRONT COMBINATION LIGHT
REMOVAL/INSTALLATION.)
4. Remove the front bumper reinforcement. (See BUMPER REINFORCEMENT
REMOVAL/ ...
Mazda 6 Service Manual: Engine control system operation inspection
Main Relay Operation Inspection
Verify that the main relay clicks when the ignition switch is turned to ON
position and off.
If there is no operation sound, inspect the following.
- Main relay (See RELAY INSPECTION.)
- Harness and connector between ignition switch and main relay termi ...