DTC B1317, B1318


id080200811500

DTC

B1317

SAS control module power supply voltage increases (16.1 V or more)

B1318

SAS control module power supply voltage decreases (less than 8 V)

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.
•  When the SAS control module power supply voltage is not within 8―16 V.
POSSIBLE CAUSE
•  Battery malfunction
•  A/B 7.5 A fuse malfunction
•  SAS control module connector malfunction
•  Open or short circuit in wiring harness between battery and SAS control module
•  Open circuit in wiring harness between SAS control module and body ground
•  SAS control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT BATTERY
•  Measure the battery positive voltage.
•  Is the voltage 8 V―16 V?
Yes
Go to the next step.
No
Battery is malfunctioning
Inspect the charge/discharge system.
2
INSPECT FUSE
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the A/B 7.5 A fuse.
•  Is the fuse normal?
Yes
Install the fuse, then go to the next step.
No
Replace the fuse.
3
INSPECT WIRING HARNESS BETWEEN BATTERY AND FUSE BLOCK
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Measure the fuse block terminal Y voltage.
•  Is the voltage 8 V―16 V?
Yes
Install the fuse, then go to the next step.
No
Repair the wiring harness between the battery and fuse block.
4
INSPECT SAS CONTROL MODULE CONNECTOR
Warning
•  Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner front seat belts, which may seriously injure you. Read the service warnings before handling the air bag system components.
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the console. (See CONSOLE REMOVAL/INSTALLATION.)
•  Disconnect all SAS control module connectors.
•  Inspect the SAS control module connection. (Corrosion, damage, and disconnected pins)
•  Is there any malfunction of the SAS control module connector?
Yes
Replace the SAS control module wiring harness.
No
Go to the next step.
5
INSPECT WIRING HARNESS BETWEEN FUSE BLOCK AND SAS CONTROL MODULE
•  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.
•  Disconnect the driver and passenger-side seat connectors.
•  Disconnect the driver and passenger-side curtain air bag module connector.
•  Remove the B-pillar lower trim. (See B-PILLAR LOWER TRIM REMOVAL/INSTALLATION.)
•  Disconnect the driver and passenger-side pre-tensioner seat belt connectors.
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Measure the voltage of SAS control module terminal 1W.
•  Is the voltage 8 V―16 V?
Yes
Go to the next step.
No
Replace the wiring harness between the fuse block and SAS control module.
6
INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND BODY GROUND
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Inspect for continuity between SAS control module connector terminal 1X and body ground.
•  Is there continuity?
Yes
Go to the next step.
No
Replace the wiring harness between the SAS control module and body ground.
7
PERFORM SAS CONTROL MODULE DTC INSPECTION
•  Reconnect the disconnected connectors.
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Clear DTCs using the M-MDS.
•  Perform the DTC inspection for the SAS control module using the M-MDS.
•  Are DTCs B1317 and/or B1318 displayed?
Yes
Replace the SAS control module.
No
DTC troubleshooting completed.