Bcm On-Board Diagnostic System; Constant Monitor; Self Test - Mazda 6 Facelift 2005 Training Manual

Accessories

BCM On-Board Diagnostic System

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The on-board diagnostic system of the BCM consists of the following functions:
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Constant monitor

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Self test

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PID monitor
Constant Monitor
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The constant monitor is carried out whenever the ignition is ON. If a fault is detected, a
DTC will be stored in the BCM. When the ignition is switched off, DTCs stored by the
constant monitor will be deleted. The constant monitor only monitors the following
systems:
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Rain sensor
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Battery voltage
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BCM IC (Integrated Circuit)
Self Test
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All systems other than those tested in the constant monitor, are monitored during the
self-test. If a fault is detected, a DTC will be stored in the BCM.
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The self-test function allows BCM DTCs to be displayed on WDS. To view these,
connect WDS to the vehicle and select the option Toolbox→Self
Test→Modules→GEM.
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When the ignition is switched off, DTCs stored by the self-test will be deleted.
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To conduct the self test, the following conditions must first be met:
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Ignition switch ON
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All switches other than ignition switch OFF
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All doors, bonnet, trunk lid and liftgate are closed and unlocked
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Parking brake is engaged
09-8
Body & Accessories
Service Training Mazda6 Facelift