Diagnostic Procedure

WARNING: This page is about a different car, the 2014 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

DTC B00A0:1C DIAGNOSTIC PROCEDURE

Step	Inspection		Action
1	INSPECT FUSE Switch the ignition off. Disconnect the negative battery cable and wait for 1 min or more. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) Remove the SRS2/ESCL 15A fuse. Is the fuse normal?	Yes	Install the fuse, then go to the next step.
1		No	Replace the fuse.
2	INSPECT SEAT WEIGHT SENSOR CONTROL MODULE CONNECTOR WARNING: Handling the component parts improperly can accidentally operate (deploy) the air bag module, which may seriously injure you. Read the service warnings/cautions and the service information before handling the air bag system components. (See AIR BAG SYSTEM SERVICE WARNINGS [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) (See AIR BAG SYSTEM SERVICE CAUTIONS [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) Disconnect the seat weight sensor control module connector. Is there any malfunction of the seat weight sensor control module connector?	Yes	Replace the malfunctioning part, then go to Step 6.
2		No	Replace the wiring harness.
3	INSPECT SEAT WEIGHT SENSOR CONTROL MODULE CIRCUIT FOR SHORT TO GROUND Seat weight sensor control module and fuse block connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): Seat weight sensor control module terminal 2A NOTE: Inspect for continuity while shaking the wiring harness between the seat weight sensor control module and fuse block. Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between seat weight sensor control module terminal and fuse block terminal. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. Replace the malfunctioning part. If there is no common connector: Replace the wiring harness which has a short to ground. Go to Step 6.
3		No	Go to the next step.
4	INSPECT SEAT WEIGHT SENSOR CONTROL MODULE CIRCUIT FOR OPEN CIRCUIT Seat weight sensor control module and fuse block connectors are disconnected. Inspect for continuity between the following terminals (wiring harness-side): Seat weight sensor control module terminal 2A-fuse block terminal NOTE: Inspect for continuity while shaking the wiring harness between the seat weight sensor control module and fuse block. Is there continuity?	Yes	Go to the next step.
4		No	Refer to the wiring diagram and verify whether or not there is a common connector between seat weight sensor control module terminal and fuse block terminal. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. Replace the malfunctioning part. If there is no common connector: Replace the wiring harness which has an open circuit. Go to Step 6.
5	INSPECT SEAT WEIGHT SENSOR CONTROL MODULE CIRCUIT FOR SHORT TO POWER SUPPLY Seat weight sensor control module and SAS control module connectors are disconnected. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) Measure the voltage at the following terminals (wiring harness-side): Seat weight sensor control module terminal 2A NOTE: Measure the voltage while shaking the wiring harness between the seat weight sensor control module and fuse block. Is the voltage 0 V ?	Yes	Go to the next step.
5		No	Refer to the wiring diagram and verify whether or not there is a common connector between seat weight sensor control module terminal and fuse block terminal. If there is a common connector: Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. Replace the malfunctioning part. If there Is no common connector: Replace the wiring harness which has a short to power supply. Go to the next step.
6	PERFORM SAS CONTROL MODULE DTC INSPECTION Reconnect the disconnected connectors. Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5] .) Switch the ignition ON (engine off or on). Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) Is the same DTC present?	Yes	Replace the seat weight sensor control module. (See SEAT WEIGHT SENSOR CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)
6		No	DTC troubleshooting completed.