1.CHECK METER DISPLAY. 1) Turn the ignition switch to ON. 2) Check the display of OFF indicator in the combination meter LCD display. | Does the display change according to operation of BSD/RCTA OFF switch- | Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: • Temporary poor contact of connector, temporary open or short circuit of harness may be the cause. • User may have kept pressing the switch for 30 seconds or more. | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2304 REAR RADAR ON-OFF SWITCH STUCK |
2.CHECK CURRENT DATA. Check the current data «SRVD System ON-OFF flag» of «Subaru Rear Vehicle Detection(RH)» or «Subaru Rear Vehicle Detection(LH)». Read Current Data | Does the display change according to operation of BSD/RCTA OFF switch- | Check the combination meter. Basic Diagnostic Procedure | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2304 REAR RADAR ON-OFF SWITCH STUCK |
3.INSPECTION OF SWITCH UNIT. Perform unit inspection of the BSD/RCTA OFF switch. Switches and Harness | | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2304 REAR RADAR ON-OFF SWITCH STUCK | Replace the BSD/RCTA OFF switch. Switches and Harness |
4.CHECK BATTERY. Check the battery. Battery Battery | | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2304 REAR RADAR ON-OFF SWITCH STUCK | Charge or replace the battery. |
5.CHECK FUSE. Check the fuse of BSD/RCTA OFF switch. Relay and Fuse | | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2304 REAR RADAR ON-OFF SWITCH STUCK | Replace the fuse. If the replaced fuse blows out easily, repair the ground short circuit in harness between the fuse and the BSD/RCTA OFF switch. |
6.CHECK HARNESS (OPEN CIRCUIT). 1) Disconnect the BSD/RCTA OFF switch connector. 2) Turn the ignition switch to ON. 3) Using a tester, measure the voltage between BSD/RCTA OFF switch connector and chassis ground. Connector & terminal (i94) No. 6 (+) — Chassis ground (−): | Is the voltage 10 V or more- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2304 REAR RADAR ON-OFF SWITCH STUCK | Repair the open circuit of harness between the fuse and the BSD/RCTA OFF switch. |
7.CHECK HARNESS (OPEN CIRCUIT). 1) Turn the ignition switch to OFF. 2) Disconnect the radar sensor LH connector. 3) Using a tester, measure the resistance between BSD/RCTA OFF switch connector and radar sensor LH connector (harness side). Connector & terminal (i94) No. 8 — (R25) No. 8: | Is the resistance less than 1 -- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2304 REAR RADAR ON-OFF SWITCH STUCK | Repair the open circuit of harness between BSD/RCTA OFF switch and radar sensor LH. |
8.CHECK HARNESS (GROUND SHORT CIRCUIT). Using a tester, measure the resistance between the BSD/RCTA OFF switch connector (harness side) and the chassis ground. Connector & terminal (i94) No. 8 — Chassis ground: | Is the resistance 1 M- or more- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2304 REAR RADAR ON-OFF SWITCH STUCK | Repair the short circuit to ground in harness between BSD/RCTA OFF switch and radar sensor LH. |
9.CHECK HARNESS (SHORT CIRCUIT TO POWER SUPPLY). 1) Turn the ignition switch to ON. 2) Using a tester, measure the voltage between the BSD/RCTA OFF switch connector (harness side) and the chassis ground. Connector & terminal (i94) No. 8 (+) — Chassis ground (−): | Is the voltage less than 1 V- | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2304 REAR RADAR ON-OFF SWITCH STUCK | Repair the short circuit to power supply in harness between BSD/RCTA OFF switch and radar sensor LH. |
10.CHECK CONNECTOR. Check the radar sensor LH connector. | Is there any fault- (Insecure connection, poor contact, etc.) | | Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2304 REAR RADAR ON-OFF SWITCH STUCK |
11.CHECK BSD/RCTA. 1) Restore the vehicle to its original state. 2) Perform the Inspection Mode. Inspection Mode | Is DTC B2304 displayed- (Current malfunction) | Replace the radar sensor LH. Radar Sensor | Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again. NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. |
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