Diagnostic Procedure

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

DTC B00C0:93, B00C1:93, B00C2:93 OR B00C3:93 [SAS CONTROL MODULE] DIAGNOSTIC PROCEDURE

Step	Inspection	Results	Action
1	INSPECT SEAT WEIGHT SENSOR CONNECTOR CONDITION 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 appropriate service information before handling the air bag system components. (See AIR BAG SYSTEM SERVICE WARNINGS [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .) (See AIR BAG SYSTEM SERVICE CAUTIONS [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .) Switch the ignition to off. Disconnect the negative battery terminal and wait for 1 min or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Disconnect the seat weight sensor connector. (See SEAT WEIGHT SENSOR CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .) Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. Is there any malfunction of the seat weight sensor connector?	Yes	Replace the malfunctioning part and perform the repair completion verification.
1		No	Go to the next step.
2	INSPECT SEAT WEIGHT SENSOR CONTROL MODULE CONNECTOR CONDITION Disconnect the seat weight sensor control module connector. (See SEAT WEIGHT SENSOR CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .) Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. Is the circuit normal?	Yes	Go to the next step.
2		No	Replace the malfunctioning part and perform the repair completion verification.
3	INSPECT SEAT WEIGHT SENSOR CIRCUIT FOR SHORT TO GROUND Seat weight sensor and seat weight sensor control module connectors are disconnected. Inspect the following seat weight sensor circuits for a short to ground. (See CIRCUIT INSPECTION .) Power supply circuit Signal circuit NOTE: Inspect for a short to ground while shaking the wiring harness between the seat weight sensor and seat weight sensor control module. Is the circuit normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT SEAT WEIGHT SENSOR CIRCUIT FOR OPEN CIRCUIT Seat weight sensor and seat weight sensor control module connectors are disconnected. Inspect the following seat weight sensor circuits for open circuit. (See CIRCUIT INSPECTION .) Power supply circuit Signal circuit Ground circuit NOTE: Inspect for open circuit while shaking the wiring harness between the seat weight sensor and seat weight sensor control module. Is the circuit normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	INSPECT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR SHORT TO OTHER SEAT WEIGHT SENSOR CIRCUIT Seat weight sensor and seat weight sensor control module connectors are disconnected. Inspect for continuity between the seat weight sensor signal circuit and following seat weight sensor circuits. (See CIRCUIT INSPECTION .) Power supply circuit Ground circuit NOTE: Inspect for continuity while shaking the wiring harness between the seat weight sensor and seat weight sensor control module. Is there continuity?	Yes	Repair or replace the malfunctioning location and perform the repair completion verification.
5		No	Go to the next step.
6	INSPECT SEAT WEIGHT SENSOR SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY Seat weight sensor and seat weight sensor control module connectors are disconnected. Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Switch the ignition ON (engine off or on). Inspect the seat weight sensor signal circuit for a short to power supply. (See CIRCUIT INSPECTION .) NOTE: Inspect for a short to power supply while shaking the wiring harness between the seat weight sensor and seat weight sensor control module. Is the circuit normal?	Yes	Replace the suspect seat weight sensor and go to the next step. (See SEAT WEIGHT SENSOR REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .)
6		No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	VERIFY WHERE MALFUNCTION IS IN SEAT WEIGHT SENSOR CONTROL MODULE OR ELSEWHERE Switch the ignition off. Disconnect the negative battery terminal and wait for 1 min or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .) Reconnect all disconnected connectors. Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC .) Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION .) Are the same Pending DTCs present?	Yes	Replace the suspect seat weight sensor control module and perform the repair completion verification. (See SEAT WEIGHT SENSOR CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .)
7		No	Perform the repair completion verification.
Repair completion verification	VERIFY TROUBLESHOOTING COMPLETED Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC .) Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION .) Are the same Pending DTCs present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .) If the CAN communication is normal, perform the diagnosis from Step 1. If the malfunction recurs, replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .)
Repair completion verification		No	DTC troubleshooting completed.