System malfunction location

• B0052:09:Passenger-side buckle switch undefined

• B0052:11:Passenger-side buckle switch circuit open or short to power supply

• B0052:14:Passenger-side buckle switch circuit short to body ground

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.

• Wiring harness between the passenger-side buckle switch and seat weight sensor control module has a malfunction

• Passenger-side buckle switch has a malfunction

Fail-safe

Not applicable

Possible cause

• Passenger-side buckle switch connector malfunction

• Short circuit to power supply or body ground in the wiring harness between passenger-side buckle switch and SAS control module

• Open circuit in the wiring harness between passenger-side buckle switch and SAS control module

• Passenger-side buckle switch malfunction

• SAS control module malfunction

Step

Inspection

Action

1

WARNING:

• Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings and cautions 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].)

• Switch the ignition off.

• Disconnect the negative battery cable and wait for 1 min or more. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Disconnect the passenger-side buckle switch connector. (See FRONT BUCKLE REMOVAL/INSTALLATION.)

• Inspect the passenger-side buckle switch connector. (Corrosion, damage, and disconnected pins)

• Is there any malfunction of the passenger-side buckle switch connector?

Yes

Replace the malfunctioning part, then go to Step 5.

No

Go to the next step.

2

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• Seat weight sensor control module terminal 2F

• Seat weight sensor control module terminal 2I

NOTE:

• Inspect for continuity while shaking the wiring harness between the seat weight sensor control module and passenger-side buckle switch.

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between seat weight sensor control module terminal and passenger-side buckle switch 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 5.

No

Go to the next step.

3

• Passenger-side buckle switch and seat weight sensor control module connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side):

• Passenger-side buckle switch terminal A—seat weight sensor control module 2F

• Passenger-side buckle switch terminal B—seat weight sensor control module 2I

NOTE:

• Inspect for continuity while shaking the wiring harness between the seat weight sensor control module and passenger-side buckle switch.

• 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 seat weight sensor control module terminal and passenger-side buckle switch 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 5.

4

• Passenger-side buckle switch and seat weight sensor control module connectors are disconnected.

• Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the following terminals (wiring harness-side):

• Seat weight sensor control module 2F

• Seat weight sensor control module 2I

NOTE:

• Measure the voltage while shaking the wiring harness between the seat weight sensor control module and passenger-side buckle switch.

• 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 seat weight sensor control module terminal and passenger-side buckle switch 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 the next step.

5

• Check the following PID/DATA monitor, using M-MDS.

  (See PID/DATA MONITOR TABLE [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• B_SW_P_FLT

• Is passenger-side buckle switch normal?

Yes

Go to the next step.

No

Replace the passenger-side front buckle. (See FRONT BUCKLE REMOVAL/INSTALLATION.)

Then go to the next step.

6

• Switch the ignition off.

• Disconnect the negative battery cable and wait for 1 min or more.

• Reconnect all disconnected connectors.

• Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.5].)

• Switch the ignition ON (engine off or on).

• Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [TWO-STEP DEPLOYMENT CONTROL SYSTEM].)

• Are the same DTCs present?

Yes

Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM])

No

DTC troubleshooting completed.