DTC B1317, B1318 [TWO-STEP DEPLOYMENT CONTROL SYSTEM]

id0802b2811500

DTC

B1317

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

B1318

SAS control module power supply voltage decreases (less than 9 V)

DETECTION CONDITION

Warning
• Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection with only 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 9-16 V.

POSSIBLE CAUSE

• Open or short circuit in wiring harness between battery and SAS control module
• SAS 10 A fuse malfunction
• Battery malfunction
• SAS control module malfunction

Diagnostic procedure

Step

Inspection

Action

1
INSPECT FUSE
• Remove the SAS 10 A fuse.
• Is the fuse normal?
Yes
Go to the next step.
No
Replace the fuse.
2
INSPECT BATTERY
• Measure the battery positive voltage.
• Is the voltage 9 V-16 V?
Yes
Go to the next step.
No
The battery has a malfunction.
Inspect the charge/discharge system.
3
INSPECT WIRING HARNESS BETWEEN BATTERY AND PJB
• Turn the ignition switch to the ON position.
• Measure the PJB terminal J-03 AP voltage.
• Is the voltage 9 V-16 V?
Yes
Install the fuse, then go to the next step.
No
Repair the wiring harness between the PJB and battery.
4
INSPECT PJB
Warning
• Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner front buckles, which may seriously injure you. Read the service warnings before handling the air bag system components.
(See SERVICE WARNINGS.)
(See SERVICE CAUTIONS.)
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Remove the column cover.
• Disconnect the clock spring connector.
• Disconnect the passenger-side air bag module connector.
• Disconnect the driver and passenger-side curtain air bag module connector.
• Disconnect the front seat connector.
• Remove the console.
• Disconnect the SAS control module connector.
• Measure the voltage at the PJB terminal J-03 AM.
• Is the voltage 9 V-16 V?
Yes
Go to the next step.
No
5
INSPECT WIRING HARNESS BETWEEN PJB AND SAS CONTROL MODULE
• Turn the ignition switch to the ON position.
• Measure the SAS control module terminal 1D voltage.
• Is the voltage 9 V-16 V?
Yes
Replace the SAS control module.
No
Repair the wiring harness between the PJB and SAS control module.