DTC B104C, B104F, B1050, U2018

id080200810900

System Malfunction Location

DTC	System Malfunction Location
M-MDS display
B104C	Short to the passenger-side side air bag sensor circuit and other sensor circuits
B104F	Passenger-side side air bag sensor internal malfunction
B1050	Passenger-side side air bag sensor circuit short to power supply or body ground
U2018	Passenger-side side air bag sensor (communication error)

Detection Condition

Warning

•  Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure

Possible Causes

System Wiring Diagram

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Diagnostic Procedure

Step	Inspection		Action
1	INSPECT PASSENGER-SIDE SIDE AIR BAG SENSOR 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 workshop manual before handling the air bag system components. (See AIR BAG SYSTEM SERVICE WARNINGS.) (See AIR BAG SYSTEM SERVICE CAUTIONS.) •  Switch the ignition to off. •  Disconnect the negative battery cable and wait for 1 min or more. (See BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].) (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) •  Remove the B-pillar lower trim (passenger-side). (See B-PILLAR LOWER TRIM REMOVAL/INSTALLATION.) •  Disconnect the passenger-side side air bag sensor connector. (See SIDE AIR BAG SENSOR REMOVAL/INSTALLATION.) •  Inspect the passenger-side side air bag sensor connector. (Corrosion, damage, and disconnected pins) •  Is there any malfunction of the passenger-side side air bag sensor connector?	Yes	Replace the passenger-side side air bag sensor wiring harness.
		No	Go to the next step.
2	INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND PASSENGER-SIDE SIDE AIR BAG SENSOR •  Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.) •  Disconnect the clock spring connector. •  Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.) •  Disconnect the passenger-side air bag module connector. (See PASSENGER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.) •  Disconnect the driver and passenger-side front seat connector. (See FRONT SEAT REMOVAL/INSTALLATION.) •  Remove the C-pillar trim. (See C-PILLAR TRIM REMOVAL/INSTALLATION.) •  Disconnect the driver and passenger-side curtain air bag module connector (harness side). (See CURTAIN AIR BAG MODULE REMOVAL/INSTALLATION.) •  Remove the B-pillar lower trim (driver-side). (See B-PILLAR LOWER TRIM REMOVAL/INSTALLATION.) •  Disconnect the lap pre-tensioner seat belt connector. (See FRONT SEAT BELT REMOVAL/INSTALLATION.) •  Disconnect the driver and passenger-side pre-tensioner seat belt connector. (See FRONT SEAT BELT REMOVAL/INSTALLATION.) •  Remove the console. (See CONSOLE REMOVAL/INSTALLATION.) •  Disconnect all SAS control module connectors. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.) •  Inspect the wiring harnesses between SAS control module connector terminal 1Q and passenger-side side air bag sensor connector terminal A, and SAS control module connector terminal 1R and passenger-side side air bag sensor connector terminal B for the following: ―  Short circuit between terminals ―  Short to body ground ―  Open circuit Note •  Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side side air bag sensor. •  Is the wiring harness normal?	Yes	Go to the next step.
		No	Replace the wiring harness between the SAS control module and the passenger-side side air bag sensor.
3	INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND PASSENGER-SIDE SIDE AIR BAG SENSOR FOR A SHORT CIRCUIT TO THE POWER SUPPLY •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].) (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) •  Switch the ignition to ON with SAS control module connector and passenger-side side air bag sensor connector disconnected. •  Measure the voltage of SAS control module connector terminals 1Q and 1R of SAS control module harness side connector. Note •  Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side side air bag sensor. •  Is the voltage measured?	Yes	Replace the wiring harness between the SAS control module and the passenger-side side air bag sensor.
		No	Replace the passenger-side side air bag sensor, then go to the next step. (See SIDE AIR BAG SENSOR REMOVAL/INSTALLATION.)
4	PERFORM SAS CONTROL MODULE DTC INSPECTION •  Switch the ignition to off. •  Disconnect the negative battery cable and wait for 1min or more. •  Reconnect all disconnected connectors. •  Connect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZR 2.0, MZR 2.5].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.3 DISI Turbo].) (See BATTERY REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].) (See BATTERY REMOVAL/INSTALLATION [MZ-CD 1.6].) (See BATTERY REMOVAL/INSTALLATION [MZR-CD 2.2].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].) (See BATTERY REMOVAL/INSTALLATION [MZR 1.5, MZR 1.6].) •  Switch the ignition to ON. •  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 DTCs present?	Yes	Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
		No	DTC troubleshooting completed.