Diesel Engines Engine
Powertrain Control Module
• The PCM is located behind a cover in the left-hand-side footwell and features a 121-pin
(two-block) connector.
NOTE: When replacing the PCM, several steps must be performed to ensure its proper
function (refer to the section “Control System, Service and Repair”).
M6FL_01075
1 Wiring harness side-connector of the PCM
• The PCM features an FEEPROM, which can be erased electronically by a flash voltage
and reprogrammed with updated calibration data. As a result, the strategy program and
the calibration data logged in the FEEPROM can be updated without replacing the PCM.
• If the PCM should be updated with a later software calibration, the module has to be
reprogrammed with the aid of the WDS. Therefore, select the option ToolboxÆ
Module ProgrammingÆModule ReprogrammingÆPCM and follow the instructions of
the WDS.
NOTE: As later software calibrations are usually released to resolve specific customer
concerns, module reprogramming should only be carried out when recommended
e.g. by a Service Information or by the Technical Hotline/Technical Service
Department.
01-86 Service Training Mazda6 Facelift
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