DTC B2438, B2439, B2692

id080200802600

DTC

B2438

Passenger‐side front buckle switch circuit short to body ground

B2439

Passenger-side front buckle switch circuit resistance not within specification

B2692

Passenger‐side front buckle switch circuit open or short to power supply
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.
•  Malfunction in the passenger-side front buckle switch circuit
POSSIBLE CAUSE
•  Malfunction of the connectors between the passenger-side front buckle switch and SAS control module
•  Passenger-side front buckle switch malfunction
•  Open or short circuit in the wiring harness between the passenger-side front buckle switch and body ground
•  Open circuit or short to ground in the wiring harness between the passenger-side front buckle switch and SAS control module
•  Open circuit or power supply short in the wiring harness between the passenger-side front buckle switch and SAS control module
•  SAS control module malfunction

Diagnostic procedure

Step

Inspection

Action
1
INSPECT PASSENGER-SIDE FRONT BUCKLE SWITCH CONNECTOR
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the front seat. (See FRONT SEAT REMOVAL/INSTALLATION.)
•  Disconnect the passenger-side front buckle switch connector. (See FRONT BUCKLE REMOVAL/INSTALLATION.)
•  Inspect the passenger-side front buckle switch connection. (Corrosion, damage, and disconnected pins)
•  Is there any malfunction of the passenger-side front buckle switch connector?
Yes
Replace the passenger-side front buckle switch wiring harness.
No
Go to the next step.
2
INSPECT PASSENGER-SIDE FRONT BUCKLE SWITCH
•  Remove the passenger-side front buckle.
•  Inspect the passenger-side front buckle switch.
•  Is the passenger-side front buckle switch normal?
Yes
Go to the next step.
No
Replace the passenger-side front buckle.
(See FRONT BUCKLE REMOVAL/INSTALLATION.)
3
INSPECT WIRING HARNESS BETWEEN PASSENGER-SIDE BUCKLE SWITCH AND GROUND
•  Inspect the wiring harness between passenger-side front buckle switch terminal F and ground for the following:
―  Short to power supply
―  Open circuit
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the wiring harness.
4
INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND PASSENGER-SIDE FRONT BUCKLE SWITCH
•  Disconnect all SAS control module connectors.
•  Inspect the wiring harness between SAS control module terminal 2H and passenger-side front buckle switch terminal E for the following:
―  Short to body ground
―  Open circuit
Note
•  Inspect for continuity while shaking the wiring harness between the SAS control module and passenger-side front buckle switch.
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the wiring harness between the SAS control module and the passenger-side front buckle.
5
INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND PASSENGER-SIDE FRONT BUCKLE SWITCH FOR A SHORT CIRCUIT TO THE POWER SUPPLY
•  Connect the negative battery cable.
•  Turn the ignition switch to the ON position.
•  Measure the voltage of SAS control module connector terminals 2H.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and passenger-side front buckle switch.
•  Is the voltage measured?
Yes
Replace the wiring harness between the SAS control module and the passenger-side front buckle.
No
Go to the next step.
6
PERFORM DTC INSPECTION
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Connect the passenger-side front buckle switch connector.
•  Connect the SAS control module connectors.
•  Connect the negative battery cable.
•  Clear DTCs using the M-MDS.
•  Verify DTCs using the M-MDS.
•  Are DTCs B2438, B2439, B2692 displayed?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.