DTC B10A6, B10A7, B10A8, B10A9, B10AA [TYPE B]

id0802d5818100


System Malfunction Location

DTC

System Malfunction Location

M-MDS display
B10A6
Lap pre-tensioner seat belt circuit open circuit or resistance high
B10A7
Lap pre-tensioner seat belt circuit short to power supply
B10A8
Lap pre-tensioner seat belt circuit short to body ground
B10A9
Lap pre-tensioner seat belt circuit resistance low
B10AA
Short to the lap pre-tensioner seat belt circuit and other air bag module circuits


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 1.10–5.77 ohms detected in lap pre-tensioner seat belt circuit
•  Wiring harness between the lap pre-tensioner seat belt and SAS control module has a malfunction

Possible Causes

•  Lap pre-tensioner seat belt connector malfunction
•  Open or short or short to ground or short to power supply circuit in the wiring harness between the lap pre-tensioner seat belt and SAS control module
•  Lap pre-tensioner seat belt malfunction
•  SAS control module malfunction

System Wiring Diagram

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Diagnostic Procedure

Step

Inspection

Action
1
INSPECT LAP 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.
•  Switch the ignition to off.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the B-pillar lower trim (driver-side). (See B-PILLAR LOWER TRIM REMOVAL/INSTALLATION.)
•  Inspect the lap pre-tensioner seat belt connector. (Corrosion, damage, and disconnected pins)
•  Is there any malfunction of the lap pre-tensioner seat belt connector?
Yes
Replace the lap pre-tensioner seat belt wiring harness.
No
Go to the next step.
2
INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND LAP PRE-TENSIONER SEAT BELT
•  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 (passenger-side). (See B-PILLAR LOWER TRIM 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 2Y and lap pre-tensioner seat belt connector terminal A, and SAS control module connector terminal 2AC and lap pre-tensioner seat belt 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 lap pre-tensioner seat belt.
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the wiring harness between the SAS control module and the lap pre-tensioner seat belt.
3
INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND LAP PRE-TENSIONER SEAT BELT FOR A SHORT CIRCUIT TO THE POWER SUPPLY
•  Connect the negative battery cable.
•  Switch the ignition to ON with SAS control module connector and lap pre-tensioner seat belt connector disconnected.
•  Measure the voltage of SAS control module connector terminals 2AC and 2Y of SAS control module harness side connector.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and lap pre-tensioner seat belt.
•  Is the voltage measured?
Yes
Replace the wiring harness between the SAS control module and the lap pre-tensioner seat belt.
No
Go to the next step.
4
INSPECT LAP PRE-TENSIONER SEAT BELT
•  Switch the ignition to off.
•  Disconnect the negative battery cable and wait for 1min or more.
•  Connect the SST (Fuel and thermometer checker) or apply 2 ohms resistance to the lap pre-tensioner seat belt connector terminals A–B.
•  Set the SST (Fuel and thermometer checker) to 2 ohms.
•  Except for the lap pre-tensioner seat belt connector, reconnect all disconnected connectors.
•  Connect the negative battery cable.
•  Switch the ignition to ON.
•  Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [TYPE B].)
•  Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [TYPE B].)
•  Are the same DTCs present?
Yes
Go to the next step.
No
Replace the lap pre-tensioner seat belt. (See FRONT SEAT BELT REMOVAL/INSTALLATION.)
5
PERFORM SAS CONTROL MODULE DTC INSPECTION
•  Switch the ignition to off.
•  Disconnect the negative battery cable and wait for 1min or more.
•  Disconnect the SST (Fuel and thermometer checker) or the 2 ohms resistance.
•  Connect the lap pre-tensioner seat belt connector.
•  Connect the negative battery cable.
•  Switch the ignition to ON.
•  Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [TYPE B].)
•  Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [TYPE B].)
•  Are the same DTCs present?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.