DTC B1412:11/B1412:12/B1412:13/B1412:19/B1412:1A [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)]

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Note

•  The SRS air bag system can be identified by whether or not the seat track position sensor is present.

―  Standard deployment control system: Without seat track position sensor

―  Two-step deployment control system: With seat track position sensor

Special Service Tool (SST)

49 N088 0A0   Fuel and thermometer checker

System malfunction location	•  B1412:11:Passenger-side rear pre-tensioner seat belt circuit short to body ground •  B1412:12:Passenger-side rear pre-tensioner seat belt circuit short to power supply •  B1412:13:Passenger-side rear pre-tensioner seat belt circuit open circuit or resistance high •  B1412:19:Short circuit to rear pre-tensioner seat belt and other air bag module circuits •  B1412:1A:Passenger-side rear pre-tensioner seat belt circuit resistance low
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. •  Resistance other than 0.81—6.42 ohms detected in passenger-side rear pre-tensioner seat belt circuit •  Wiring harness between the passenger-side rear pre-tensioner seat belt and SAS control module has a malfunction
Fail-safe function	Not applicable
Possible cause	•  Passenger-side rear pre-tensioner seat belt seat belt connector malfunction •  Open circuit in the wiring harness between the following terminals: L.H.D. ―  SAS control module terminal 1G—passenger-side rear pre-tensioner seat belt seat belt terminal A ―  SAS control module terminal 1C—passenger-side rear pre-tensioner seat belt seat belt terminal B R.H.D. ―  SAS control module terminal 2B—passenger-side rear pre-tensioner seat belt seat belt terminal A ―  SAS control module terminal 2F—passenger-side rear pre-tensioner seat belt seat belt terminal B •  Short circuit to body ground in the wiring harness between the following terminals: L.H.D. ―  SAS control module terminal 1G—passenger-side rear pre-tensioner seat belt seat belt terminal A ―  SAS control module terminal 1C—passenger-side rear pre-tensioner seat belt seat belt terminal B R.H.D. ―  SAS control module terminal 2B—passenger-side rear pre-tensioner seat belt seat belt terminal A ―  SAS control module terminal 2F—passenger-side rear pre-tensioner seat belt seat belt terminal B •  Short circuit to power supply in the wiring harness between the following terminals: L.H.D. ―  SAS control module terminal 1G—passenger-side rear pre-tensioner seat belt seat belt terminal A ―  SAS control module terminal 1C—passenger-side rear pre-tensioner seat belt seat belt terminal B R.H.D. ―  SAS control module terminal 2B—passenger-side rear pre-tensioner seat belt seat belt terminal A ―  SAS control module terminal 2F—passenger-side rear pre-tensioner seat belt seat belt terminal B •  Short circuit to each other in the wiring harness between the passenger-side rear pre-tensioner seat belt seat belt and SAS control module •  Short circuit to other air bag module or active bonnet actuator circuits in the wiring harness between the passenger-side rear pre-tensioner seat belt seat belt and SAS control module •  Passenger-side rear pre-tensioner seat belt seat belt malfunction •  SAS control module malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT 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 [TWO-STEP DEPLOYMENT CONTROL SYSTEM].) (See AIR BAG SYSTEM SERVICE CAUTIONS [TWO-STEP DEPLOYMENT CONTROL SYSTEM].) (See ACTIVE BONNET SERVICE WARNINGS.) (See ACTIVE BONNET SERVICE CAUTIONS.) •  Switch the ignition off. •  Disconnect the negative battery terminal and wait for 1 min or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Remove the passenger-side trunk side trim. (See TRUNK SIDE TRIM REMOVAL/INSTALLATION.) •  Disconnect the passenger-side rear pre-tensioner seat belt seat belt connector. (See REAR SEAT BELT REMOVAL/INSTALLATION.) •  Inspect the passenger-side rear pre-tensioner seat belt seat belt connector (wiring harness-side). (Corrosion, damage, and disconnected pins) •  Is there any malfunction of the passenger-side rear pre-tensioner seat belt seat belt connector (wiring harness-side)?	Yes	Replace the malfunctioning part, then go to Step 8.
		No	Go to the next step.
2	INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT CIRCUIT FOR SHORT TO GROUND •  Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.) •  Disconnect the clock spring connector. (See CLOCK SPRING REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].) •  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 [TWO-STEP DEPLOYMENT CONTROL SYSTEM].) •  Disconnect the driver and passenger-side front seat connectors. (See FRONT SEAT REMOVAL/INSTALLATION.) •  Remove the driver and passenger-side B-pillar lower trim. (See B-PILLAR UPPER TRIM REMOVAL/INSTALLATION.) •  Disconnect the driver and passenger-side pre-tensioner seat belt connector. (See FRONT SEAT BELT REMOVAL/INSTALLATION.) •  Remove the driver-side trunk side trim. (with rear pre-tensioner seat belt) (See TRUNK SIDE TRIM REMOVAL/INSTALLATION.) •  Disconnect the driver-side rear pre-tensioner seat belt connectors. (See REAR SEAT BELT REMOVAL/INSTALLATION.) •  Remove the headliner. (See HEADLINER REMOVAL/INSTALLATION.) •  Disconnect the driver and passenger-side curtain air bag module connectors. (See CURTAIN AIR BAG MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].) •  Disconnect the active bonnet actuator connector. (See ACTIVE BONNET ACTUATOR REMOVAL/INSTALLATION.) •  Disconnect the all SAS control module connectors. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].) •  Inspect for continuity between the following terminals (wiring harness-side) and body ground: L.H.D. ―  SAS control module terminal 1G ―  SAS control module terminal 1C R.H.D. ―  SAS control module terminal 2B ―  SAS control module terminal 2F Note •  Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side rear pre-tensioner seat belt seat belt. •  Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal and passenger-side rear pre-tensioner seat belt seat belt 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 8.
		No	Go to the next step.
3	INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT CIRCUIT FOR OPEN CIRCUIT •  Passenger-side rear pre-tensioner seat belt seat belt and SAS control module connectors are disconnected. •  Inspect for continuity between the following terminals (wiring harness-side): L.H.D. ―  Passenger-side rear pre-tensioner seat belt seat belt terminal A—SAS control module terminal 1G ―  Passenger-side rear pre-tensioner seat belt seat belt terminal B—SAS control module terminal 1C R.H.D. ―  Passenger-side rear pre-tensioner seat belt seat belt terminal A—SAS control module terminal 2B ―  Passenger-side rear pre-tensioner seat belt seat belt terminal B—SAS control module terminal 2F Note •  Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side rear pre-tensioner seat belt seat belt. •  Is there continuity?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal and passenger-side rear pre-tensioner seat belt seat belt 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 8.
4	INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT CIRCUIT FOR SHORT TO EACH OTHER •  Passenger-side rear pre-tensioner seat belt seat belt and SAS control module connectors are disconnected. •  Switch the ignition off. •  Inspect for continuity between the following terminals (wiring harness-side): L.H.D. ―  SAS control module terminal 1G—SAS control module terminal 1C R.H.D. ―  SAS control module terminal 2B—SAS control module terminal 2F Note •  Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side rear pre-tensioner seat belt seat belt. •  Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal and passenger-side rear pre-tensioner seat belt seat belt 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 each other. •  Replace the malfunctioning part. If there is no common connector: •  Replace the wiring harness which has a short to each other. Go to Step 8.
		No	Go to the next step.
5	INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT CIRCUIT FOR SHORT TO OTHER AIR BAG MODULE OR ACTIVE BONNET ACTUATOR CIRCUIT •  Passenger-side rear pre-tensioner seat belt seat belt and SAS control module connectors are disconnected. •  Other air bag module, active bonnet actuator and pre-tensioner seat belt connectors are disconnected. •  Refer to the wiring diagram and inspect for continuity between the passenger-side rear pre-tensioner seat belt seat belt terminals and other air bag module / active bonnet actuator / pre-tensioner seat belt terminals (wiring harness-side). Note •  Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side rear pre-tensioner seat belt seat belt. •  Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal and passenger-side rear pre-tensioner seat belt seat belt 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 other air bag module or active bonnet actuator or pre-tensioner seat belt circuit. •  Replace the malfunctioning part. If there is no common connector: •  Replace the wiring harness which has a short to other air bag module or active bonnet actuator or pre-tensioner seat belt circuit. Go to Step 8.
		No	Go to the next step.
6	INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT CIRCUIT FOR SHORT TO POWER SUPPLY •  Passenger-side rear pre-tensioner seat belt seat belt and SAS control module connectors are disconnected. •  Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition ON (engine off or on). •  Measure the voltage at the following terminals (wiring harness-side): L.H.D. ―  SAS control module terminal 1G ―  SAS control module terminal 1C R.H.D. ―  SAS control module terminal 2B ―  SAS control module terminal 2F Note •  Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side rear pre-tensioner seat belt seat belt. •  Is the voltage 0 V?	Yes	Go to the next step.
		No	Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal and passenger-side rear pre-tensioner seat belt seat belt 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 Step 8.
7	INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT •  Switch the ignition off. •  Disconnect the negative battery terminal and wait for 1 min or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Connect the SAS control module connectors. •  Except for the passenger-side rear pre-tensioner seat belt seat belt connector, reconnect all disconnected connectors. •  Connect the SST (49 N088 0A0) or apply 2 ohms resistance to the passenger-side rear pre-tensioner seat belt seat belt connector (wiring harness-side) terminals A–B. •  Set the SST (49 N088 0A0) to 2 ohms. •  Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition ON (engine off or on). •  Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].) •  Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].) •  Are the same Pending DTCs present?	Yes	Go to the next step.
		No	Replace the passenger-side rear pre-tensioner seat belt seat belt. (See FRONT SEAT BELT REMOVAL/INSTALLATION.) Then go to the next step.
8	PERFORM SAS CONTROL MODULE DTC INSPECTION •  Switch the ignition off. •  Disconnect the negative battery terminal and wait for 1 min or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Disconnect the SST (49 N088 0A0) or the 2 ohms resistance. •  Connect the passenger-side rear pre-tensioner seat belt seat belt connector. •  Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Switch the ignition ON (engine off or on). •  Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].) •  Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM)].) •  Are the same Pending DTCs present?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)
		No	DTC troubleshooting completed.