1. Connect the WDS or equivalent to the DLC-2.
2. Measure the PID value.
Note
PID/DATA MONITOR AND RECORD function table

Dtc p0841
TroubleshootingMazda 6 Service Manual: Thermostat
THERMOSTAT REMOVAL/INSTALLATION
1. Remove the plug hole plate.
2. Disconnect the negative battery cable.
3. Drain the engine coolant. (See COOLING SYSTEM SERVICE WARNINGS.)
4. Remove the drive belt. (See DRIVE BELT REPLACEMENT.)
5. Remove the washer tank.
6. Remove the P/S oil pump.
Note
...
Mazda 6 Service Manual: Front seat belt removal/installation
Warning
Handling the front seat belt (pre-tensioner seat belt) improperly
can accidentally deploy the pre-tensioner, which may seriously injure you.
Read SERVICE WARNINGS before handling the front seat belt. (See SERVICE
WARNINGS.)
Warning
The side air bag sensor is attached to t ...