Subaru Legacy BN/BS (2015-2019) Service Manual: Inspection mode operation

Subaru Legacy BN/BS (2015-2019) Service Manual / Blind spot detection rear cross traffic alert (diagnostics) / Inspection mode operation

It is possible to diagnose the DTC by performing the indicated inspection mode. After correcting the DTC, perform a necessary inspection mode and make sure that the function is resumed correctly and the DTC is recorded.

1. INSPECTION MODE 1

DTC	Item	Note
U0073	CAN FAILURE, BUS ‘OFF’ DETECTION	—
U0101	LOST COMMUNICATION WITH TCM	—
U0122	LOST COMMUNICATION WITH VEHICLE DYNAMICS CONTROL MODULE	—
U0140	LOST COMMUNICATION WITH BODY CONTROL MODULE	—
U0155	LOST COMMUNICATION WITH INSTRUMENT PANEL CLUSTER (IPC) CONTROL MODULE	—
U0402	INVALID DATA RECEIVED FROM TCM	—
U0416	INVALID DATA RECEIVED FROM VEHICLE DYNAMICS CONTROL MODULE	—
U0422	INVALID DATA RECEIVED FROM BODY CONTROL MODULE	—
U0423	INVALID DATA RECEIVED FROM INSTRUMENT PANEL CLUSTER CONTROL MODULE	—
B2304	REAR RADAR ON-OFF SWITCH STUCK	—
B2311	REAR RADAR DETECT TCM	—
B2313	REAR RADAR DETECT VDC	—
B2327	REAR RADAR INTERNAL FAILURE (INTERNAL ELECTRIC CIRCUIT)	—
B2350	REAR RADAR COMMUNICATION ERROR BETWEEN MASTER AND SLAVE	—

1. Perform the Clear Memory Mode. Clear Memory Mode

2. Read the DTC and check that the DTC is not displayed. Read Diagnostic Trouble Code (DTC)

NOTE:

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis according to DTC. After solving the DTC, repeat from step 1).

3. Start the engine and wait for 30 seconds or more.

4. Read the DTC and check that the DTC is not displayed. Read Diagnostic Trouble Code (DTC)

NOTE:

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis according to DTC. List of Diagnostic Trouble Code (DTC)

2. INSPECTION MODE 2

DTC	Item	Note
B2300	REAR RADAR CIRCUIT LOW	—
B2301	REAR RADAR CIRCUIT HIGH	—

1. Perform the Clear Memory Mode. Clear Memory Mode

2. Read the DTC and check that the DTC is not displayed. Read Diagnostic Trouble Code (DTC)

NOTE:

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis according to DTC. After solving the DTC, repeat from step 1).

3. Start the engine.

4. Perform the System Operation Check Mode «Door mirror indicator active test». System Operation Check Mode

5. Read the DTC and check that the DTC is not displayed. Read Diagnostic Trouble Code (DTC)

NOTE:

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis according to DTC. List of Diagnostic Trouble Code (DTC)

3. INSPECTION MODE 3

DTC	Item	Note
B2329	REAR RADAR AXIS ALIGNMENT INCOMPLETE	—

1. Perform the Clear Memory Mode. Clear Memory Mode

2. Read the DTC and check that the DTC is not displayed. Read Diagnostic Trouble Code (DTC)

NOTE:

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis according to DTC. After solving the DTC, repeat from step 1).

3. Perform the adjustment of radar axis.

4. Read the DTC and check that the DTC is not displayed. Read Diagnostic Trouble Code (DTC)

NOTE:

If the DTC is displayed on the screen, the trouble is still present. Perform the diagnosis according to DTC. List of Diagnostic Trouble Code (DTC)

Electrical component location location

(1)Outer mirror ASSY RH(3)Radar sensor RH (slave)(5)BSD/RCTA OFF switch(2)Outer mirror ASSY LH(4)Radar sensor LH (master)(6)Data link connector ...

List of cancel code list

CodeItemContents of diagnosisB2320REAR RADAR LOW VOLTAGE (LESS THAN 9 V)Temporarily stops because the voltage supplied to radar drops to or below 9 V. Returns to normal when the voltage becomes normal ...

Other materials:

Dtc b1873 short in front seat cushion airbag rh (to +b)
DIAGNOSIS START CONDITION:Ignition voltage is 10 V to 16 V.DTC DETECTING CONDITION:Short circuit failure in power supply (shorted in main harness power supply, shorted in front seat side airbag RH power supply, shorted in airbag CM internal circuit power supply)CAUTION:Before performing diagnosis, r ...