Subaru Crosstrek Service Manual: Dtc b2300 rear radar circuit low

DTC detecting condition:

• Short circuit to ground in the harness between radar sensor and outer mirror assembly

• Ground short circuit of the harness in outer mirror assembly module (Malfunction of the outer mirror assembly)

• Defective radar sensor

• All functions of BSD/RCTA stop.

• Fail icon is displayed in the combination meter LCD display.

• Failure-related notification is displayed for approx. two seconds on LCD display in the combination meter.

For the coupling connector, refer to “WIRING SYSTEM”.

• Radar sensor LH

Check and replace the side that displayed the DTC.

1.CHECK DTC.

Read the DTC. Read Diagnostic Trouble Code (DTC) > OPERATION">

Is DTC B2327 displayed? (Current malfunction)

Perform the diagnosis according to DTC. Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2327 REAR RADAR INTERNAL FAILURE (INTERNAL ELECTRIC CIRCUIT)">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2300 REAR RADAR CIRCUIT LOW">Go to Step 2.

2.CHECK DTC.

Read the DTC. Read Diagnostic Trouble Code (DTC) > OPERATION">

Is DTC B2300 displayed? (Current malfunction)

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2300 REAR RADAR CIRCUIT LOW">Go to Step 3.

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.

3.CHECK OPERATION CHECK MODE.

Perform the system operation check mode «Door mirror indicator active test» from «Subaru Rear Vehicle Detection(RH)» or «Subaru Rear Vehicle Detection(LH)». System Operation Check Mode">

Does the indicator illuminate?

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.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2300 REAR RADAR CIRCUIT LOW">Go to Step 4.

4.CHECK HARNESS (GROUND SHORT CIRCUIT).

1) Disconnect the radar sensor connector.

2) Disconnect the outer mirror assembly connector.

3) Using a tester, measure the resistance between radar sensor connector (harness side) and the chassis ground.

Connector & terminal

Radar sensor LH

(R25) No. 4 — Chassis ground:

Radar sensor RH

(R61) No. 4 — Chassis ground:

Is the resistance 1 M? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2300 REAR RADAR CIRCUIT LOW">Go to Step 5.

Repair the short to ground in harness between radar sensor connector and outer mirror assembly connector.

5.CHECK CONNECTOR.

Check the radar sensor connector and the outer mirror assembly connector.

Is there any fault? (Insecure connection, poor contact, etc.)

Repair the connector.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2300 REAR RADAR CIRCUIT LOW">Go to Step 6.

6.CHECK OUTER MIRROR ASSEMBLY.

Perform unit-check for the outer mirror assembly. Outer Mirror Assembly">

Is there any fault?

Replace the outer mirror assembly. Outer Mirror Assembly">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B2300 REAR RADAR CIRCUIT LOW">Go to Step 7.

7.CHECK BSD/RCTA.

1) Restore the vehicle to its original state.

2) Perform the Inspection Mode. Inspection Mode">

Is DTC B2300 displayed? (Current malfunction)

Replace the radar sensor. 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.

Dtc u0140 lost communication with body control module

Dtc b2301 rear radar circuit high

Other materials:

Driving tips
Always apply the foot or parking brake when the vehicle is stopped in the "D" or "R" position. Make sure to apply the parking brake when parking your vehicle. Do not hold the vehicle with only the mechanical friction of the transmission. Do not keep the vehicle in a stationary pos ...

Inspection
MANUAL TRANSMISSION AND DIFFERENTIAL(5MT) > Transmission Gear OilINSPECTION1. Park the vehicle on a level surface.2. Turn the ignition switch to OFF, and wait until the engine cools.3. Remove the oil level gauge and wipe it clean.4. Reinsert the oil level gauge all the way. Be sure that the oil l ...

Two separate circuits
Your vehicle has two separate circuit brake systems. Each circuit works diagonally across the vehicle. If one circuit of the brake system should fail, the other half of the system still works. If one circuit fails, the brake pedal will go down much closer to the floor than usual and you will n ...