RM36D0EC _56 Audio / Visual / Telematics _083082 PARK ASSIST / MONITORING _0711992 BLIND SPOT MONITOR SYSTEM C

PARK ASSIST / MONITORING BLIND SPOT MONITOR SYSTEM U023287 Lost Communication with Side Obstacle Detection Control Module "A" Missing Message

DESCRIPTION

This DTC is stored when the blind spot monitor sensor LH (B) judges that there is a communication problem with the blind spot monitor sensor RH (A).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U023287	Lost Communication with Side Obstacle Detection Control Module "A" Missing Message	The blind spot monitor sensor LH (B) cannot receive signals from the blind spot monitor sensor RH (A)	· Open or short in CAN bus main wire or connector · Blind spot monitor sensor LH (B) · Power source circuit of blind spot monitor sensor RH (A) · Blind spot monitor sensor RH (A) ground circuit · Blind spot monitor sensor RH (A)

HINT:: If the DTCs are output simultaneously, the inspection area can be narrowed down.

Pattern	DTC Output Part Name (Display on GTS)		Suspected Area (Malfunction Status)
	Blind spot monitor sensor LH (B) (Blind Spot Monitor "B")	Blind spot monitor sensor RH (A) (Blind Spot Monitor "A")
	U023287	U023387
○: DTC is output -: DTC is not output
Pattern 1	○	-	· Local bus (Open or Short) · Power source circuit of blind spot monitor sensor RH (A) · Blind spot monitor sensor RH (A) (Internal malfunction) · Blind spot monitor sensor LH (B) (Internal malfunction)
Pattern 2	-	○	Blind spot monitor sensor RH (A) (Internal malfunction)

WIRING DIAGRAM

5.542,2.677 6.698,3.125 1.156,0.448 10 false Blind Spot Monitor Sensor LH (B) 3.115,2.688 4.281,3.146 1.167,0.458 10 false Blind Spot Monitor Sensor RH (A) 0.458,1.24 1.385,1.875 0.927,0.635 10 false from IGR NO.1 Relay 1.875,1.448 2.833,1.635 0.958,0.188 10 false ECU-IGR NO.1 3.208,1.323 4.083,1.875 0.875,0.552 10 false BRB 3.781,0.99 4.656,1.542 0.875,0.552 10 false CA2P 5.688,0.99 6.563,1.542 0.875,0.552 10 false CA2P 5.688,1.854 6.563,2.406 0.875,0.552 10 false CA2N 3.781,1.854 4.656,2.406 0.875,0.552 10 false CA2N 3.188,1.885 4.063,2.438 0.875,0.552 10 false BRGD 5.542,2.5 5.99,2.719 0.448,0.219 10 false Q1 3.104,2.51 3.552,2.729 0.448,0.219 10 false Q13 3.042,1.156 3.917,1.708 0.875,0.552 10 false 5 2.969,1.792 3.844,2.344 0.875,0.552 10 false 10 4.219,1.844 5.094,2.396 0.875,0.552 10 false 6 5.469,0.979 6.344,1.531 0.875,0.552 10 false 1 4.219,0.99 5.094,1.542 0.875,0.552 10 false 1 5.479,1.854 6.354,2.406 0.875,0.552 10 false 6

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

Inspect the fuses for circuits related to this system before performing the following procedure.

Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.

After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>BEFORE DISCONNECTING BATTERY202304,999999,_V1,_083041,_0402304,RM100000002AYZV,

When disconnecting and reconnecting the auxiliary battery

HINT:: When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.; Click hereGeneral>SETUP>WHEN DISCONNECTING OR RECONNECTING BATTERY TERMINAL>AUTOMATIC LEARNING CHART202409,999999,_V1,_083041,_0402304,RM100000002NY03,

HINT:: ·

Operating the ignition switch, any other switches or a door triggers related ECU and sensor communication on the CAN. This communication will cause the resistance value to change.

·

Even after DTCs are cleared, if a DTC is stored again after driving the vehicle for a while, the malfunction may be occurring due to vibration of the vehicle. In such a case, wiggling the ECUs or wire harness while performing the inspection below may help determine the cause of the malfunction.

PROCEDURE

1.CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH [A] - BODY GROUND)

1.615,0.292 1.958,0.51 0.344,0.219 2.49,1.906 2.333,1.906 2.333,1.906 1.99,1.354 true 0.135,0.104 0.448,0.302 0.313,0.198 10 false *a 1.667,0.323 1.979,0.521 0.313,0.198 10 false Q13 2.573,1.833 3.042,2.01 0.469,0.177 10 false BRGD

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor RH [A])

Disconnect the blind spot monitor sensor RH (A) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Q13-10 (BRGD) - Body ground	Always	Below 1 Ω

Result:

Proceed to
OK
NG

2.CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH [A] POWER SOURCE)

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR RH [A] POWER SOURCE)

1.5,0.271 1.854,0.5 0.354,0.229 1.979,1.167 2.49,0.531 2.49,0.531 2.688,0.531 true 0.083,0.052 0.396,0.25 0.313,0.198 10 false *a 1.573,0.323 1.885,0.521 0.313,0.198 10 false Q13 2.802,0.458 3.208,0.646 0.406,0.188 10 false BRB

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor RH [A])

Disconnect the blind spot monitor sensor RH (A) connector.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
Q13-5 (BRB) - Body ground	Ignition switch ON	11 to 14 V
Q13-5 (BRB) - Body ground	Ignition switch off	Below 1 V

Result:

Proceed to
OK
NG

3.CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH [B])

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH [B])

0.229,0.729 0.635,0.969 0.406,0.24 0.167,2.406 0.573,2.646 0.406,0.24 1.052,1.917 1.26,1.917 1.26,1.917 1.625,2.417 true 2.271,2.813 2.521,3.146 2.521,3.146 2.688,3.146 true 1.094,1.5 1.229,1.5 1.229,1.5 1.458,1.021 true 1.073,0.24 1.198,0.24 1.198,0.24 1.438,0.885 true 0.313,0.781 0.771,0.979 0.458,0.198 10 false Q1 0.219,2.448 0.719,2.656 0.5,0.208 10 false G114 0.656,0.177 1.115,0.375 0.458,0.198 10 false CA2P 0.708,1.438 1.167,1.635 0.458,0.198 10 false CA2N 0.813,1.844 1.271,2.042 0.458,0.198 10 false CG 2.75,3.073 3.208,3.271 0.458,0.198 10 false BAT 0.125,0.135 0.583,0.333 0.458,0.198 10 false *a 0.167,1.677 0.625,1.875 0.458,0.198 10 false *b

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor LH [B])
*b	Front view of wire harness connector (DLC3)

Disconnect the cable from the negative (-) auxiliary battery terminal.

Disconnect the blind spot monitor sensor LH (B) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Q1-1 (CA2P) - Q1-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω
Q1-1 (CA2P) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
Q1-6 (CA2N) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
Q1-1 (CA2P) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
Q1-6 (CA2N) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE BLIND SPOT MONITOR SENSOR LH (B)

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>BLIND SPOT MONITOR SENSOR>REMOVAL202409,999999,_56,_083082,_0417653,RM100000002NTDY,

4.CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH [A])

0.229,0.729 0.635,0.969 0.406,0.24 0.167,2.406 0.573,2.646 0.406,0.24 1.052,1.917 1.26,1.917 1.26,1.917 1.625,2.417 true 2.271,2.813 2.521,3.146 2.521,3.146 2.688,3.146 true 1.094,1.5 1.229,1.5 1.229,1.5 1.458,1.021 true 1.073,0.24 1.198,0.24 1.198,0.24 1.438,0.885 true 0.313,0.781 0.771,0.979 0.458,0.198 10 false Q13 0.219,2.448 0.719,2.656 0.5,0.208 10 false G114 0.656,0.177 1.115,0.375 0.458,0.198 10 false CA2P 0.708,1.438 1.167,1.635 0.458,0.198 10 false CA2N 0.813,1.844 1.271,2.042 0.458,0.198 10 false CG 2.75,3.073 3.208,3.271 0.458,0.198 10 false BAT 0.125,0.135 0.583,0.333 0.458,0.198 10 false *a 0.167,1.677 0.625,1.875 0.458,0.198 10 false *b

*a	Front view of wire harness connector (to Blind Spot Monitor Sensor RH [A])
*b	Front view of wire harness connector (DLC3)

Disconnect the cable from the negative (-) auxiliary battery terminal.

Disconnect the blind spot monitor sensor RH (A) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
Q13-1 (CA2P) - Q13-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω
Q13-1 (CA2P) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
Q13-6 (CA2N) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
Q13-1 (CA2P) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
Q13-6 (CA2N) - G114-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher

Result:

Proceed to
OK
NG

REPLACE BLIND SPOT MONITOR SENSOR RH (A)

Click hereAudio / Visual / Telematics>PARK ASSIST / MONITORING>BLIND SPOT MONITOR SENSOR>REMOVAL202409,999999,_56,_083082,_0417653,RM100000002NTDY,

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR