DTC B1128:11/B1128:12/B1128:13/B1128:19/B1128:1A [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)]

id0802g7821600

Special Service Tool (SST)

49 N088 0A0   Fuel and thermometer checker

System malfunction location	•  B1128:11:Driver-side curtain air bag module circuit short to body ground •  B1128:12:Driver-side curtain air bag module circuit short to power supply •  B1128:13:Driver-side curtain air bag module circuit open circuit or resistance high •  B1128:19:Short circuit to driver-side curtain air bag module and other air bag module circuits •  B1128:1A:Driver-side curtain air bag module 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 0.88—6.33 ohms detected in driver-side curtain air bag module circuit •  Wiring harness between the driver-side curtain air bag module and SAS control module has a malfunction
Fail-safe	Not applicable
Possible cause	•  Driver-side curtain air bag module connector malfunction •  Open circuit in the wiring harness between the following terminals: ―  SAS control module terminal 1U—driver-side curtain air bag module terminal A ―  SAS control module terminal 1W—driver-side curtain air bag module terminal B •  Short circuit to body ground in the wiring harness between the following terminals: ―  SAS control module terminal 1U—driver-side curtain air bag module terminal A ―  SAS control module terminal 1W—driver-side curtain air bag module terminal B •  Short circuit to power supply in the wiring harness between the following terminals: ―  SAS control module terminal 1U—driver-side curtain air bag module terminal A ―  SAS control module terminal 1W—driver-side curtain air bag module terminal B •  Short circuit to each other in the wiring harness between the driver-side curtain air bag module and SAS control module •  Short circuit to other air bag module circuits in the wiring harness between the driver-side curtain air bag module and SAS control module •  Driver-side curtain air bag module malfunction •  SAS control module malfunction

Diagnostic Procedure

Warning

•  Handling the component parts improperly can accidentally operate (deploy) the air bag modules and pre-tensioner seat belts, 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 [STANDARD DEPLOYMENT CONTROL SYSTEM].) (See AIR BAG SYSTEM SERVICE CAUTIONS [STANDARD DEPLOYMENT CONTROL SYSTEM].)

Step	Inspection		Action
1	INSPECT DRIVER-SIDE CURTAIN AIR BAG MODULE CONNECTOR •  Switch the ignition off. •  Disconnect the negative battery terminal and wait for 1 min or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) •  Remove the driver-side headliner. (See HEADLINER REMOVAL/INSTALLATION.) •  Disconnect the driver-side curtain air bag module connector. (See CURTAIN AIR BAG MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].) •  Inspect the driver-side curtain air bag module connector (wiring harness-side). (Corrosion, damage, and disconnected pins) •  Is there any malfunction of the driver-side curtain air bag module connector (wiring harness-side)?	Yes	Replace the malfunctioning part, then go to Step 8.
		No	Go to the next step.
2	INSPECT DRIVER-SIDE CURTAIN AIR BAG MODULE CIRCUIT FOR SHORT TO GROUND •  Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.) •  Disconnect the clock spring connector. (See CLOCK SPRING REMOVAL/INSTALLATION [STANDARD 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 [STANDARD DEPLOYMENT CONTROL SYSTEM].) •  Disconnect the driver and passenger-side front seat connectors. (See FRONT SEAT REMOVAL/INSTALLATION.) •  Remove the B-pillar lower trim. (See B-PILLAR LOWER TRIM REMOVAL/INSTALLATION.) •  Disconnect the driver and passenger-side pre-tensioner seat belt connectors. (See FRONT SEAT BELT REMOVAL/INSTALLATION.) •  Remove the headliner. (See HEADLINER REMOVAL/INSTALLATION.) •  Disconnect the passenger-side curtain air bag module connector. (See CURTAIN AIR BAG MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].) •  Disconnect the all SAS control module connectors. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].) •  Inspect for continuity between the following terminals (wiring harness-side) and body ground: ―  SAS control module terminal 1U ―  SAS control module terminal 1W Note •  Inspect for continuity while shaking the wiring harness between the SAS control module and the driver-side curtain air bag module. •  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 driver-side curtain air bag module 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 DRIVER-SIDE CURTAIN AIR BAG MODULE CIRCUIT FOR OPEN CIRCUIT •  Driver-side curtain air bag module and SAS control module connectors are disconnected. •  Inspect for continuity between the following terminals (wiring harness-side): ―  Driver-side curtain air bag module terminal A—SAS control module terminal 1U ―  Driver-side curtain air bag module terminal B—SAS control module terminal 1W Note •  Inspect for continuity while shaking the wiring harness between the SAS control module and driver-side curtain air bag module. •  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 driver-side curtain air bag module 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 DRIVER-SIDE CURTAIN AIR BAG MODULE CIRCUIT FOR SHORT TO EACH OTHER •  Driver-side curtain air bag module and SAS control module connectors are disconnected. •  Inspect for continuity between the following terminals (wiring harness-side): ―  SAS control module terminal 1U—SAS control module terminal 1W Note •  Inspect for continuity while shaking the wiring harness between the SAS control module and driver-side curtain air bag module. •  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 driver-side curtain air bag module 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 DRIVER-SIDE CURTAIN AIR BAG MODULE CIRCUIT FOR SHORT TO OTHER AIR BAG MODULE CIRCUITS •  Driver-side curtain air bag module and SAS control module connectors are disconnected. •  Other air bag module and pre-tensioner seat belt connectors are disconnected. •  Refer to the wiring diagram and inspect for continuity between the driver-side curtain air bag module terminals and other air bag module / pre-tensioner seat belt terminals (wiring harness-side). Note •  Inspect for continuity while shaking the wiring harness between the SAS control module and driver-side curtain air bag module. •  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 driver-side curtain air bag module 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 pre-tensioner seat belt circuits. •  Replace the malfunctioning part. If there is no common connector: •  Replace the wiring harness which has a short to other air bag module or pre-tensioner seat belt circuits. Go to Step 8.
		No	Go to the next step.
6	INSPECT DRIVER-SIDE CURTAIN AIR BAG MODULE CIRCUIT FOR SHORT TO POWER SUPPLY •  Driver-side curtain air bag module 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): ―  SAS control module terminal 1U ―  SAS control module terminal 1W Note •  Measure the voltage while shaking the wiring harness between the SAS control module and driver-side curtain air bag module. •  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 driver-side curtain air bag module 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 DRIVER-SIDE CURTAIN AIR BAG MODULE •  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 driver-side curtain air bag module connector, reconnect all disconnected connectors. •  Connect the SST (49 N088 0A0) or apply 2 ohms resistance to the driver-side curtain air bag module connector (wiring harness-side) terminals A and 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 (STANDARD DEPLOYMENT CONTROL SYSTEM)].) •  Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].) •  Are the same DTCs present?	Yes	Go to the next step.
		No	Replace the driver-side curtain air bag module. (See CURTAIN AIR BAG MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].) 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. •  Disconnect the SST (49 N088 0A0) or the 2 ohms resistance. •  Connect the driver-side curtain air bag module 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 (STANDARD DEPLOYMENT CONTROL SYSTEM)].) •  Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].) •  Are the same DTCs present?	Yes	Repeat the inspection from Step 1. •  If the malfunction recurs, replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)
		No	DTC troubleshooting completed.