PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: U0232; Lost Communication with Blind Spot Monitor Slave Module; 2018 - 2020 MY Camry HV [07/2017

Last Modified: 11-20-2023	6.11:8.1.0	Doc ID: RM1000000015GUI
Model Year Start: 2018	Model: Camry HV	Prod Date Range: [07/2017 - 10/2020]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: U0232; Lost Communication with Blind Spot Monitor Slave Module; 2018 - 2020 MY Camry HV [07/2017 - 10/2020]

DTC

U0232

Lost Communication with Blind Spot Monitor Slave Module

DESCRIPTION

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U0232	Lost Communication with Blind Spot Monitor Slave Module	The blind spot monitor sensor (master) cannot receive signals from the blind spot monitor sensor (slave)	Open or short in CAN bus main wire or connector Open or short in No. 6 CAN junction connector* Blind spot monitor sensor LH Power source circuit of blind spot monitor sensor LH Blind spot monitor sensor LH ground circuit Blind spot monitor sensor RH

*: w/ Intelligent Clearance Sonar System

WIRING DIAGRAM

w/ Intelligent Clearance Sonar System

w/o Intelligent Clearance Sonar System

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 power 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 turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.
Click here

HINT:

Operating the power 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.	CONFIRM MODEL

(a) Choose the model to be inspected.

Result	Proceed to
w/ Intelligent Clearance Sonar System	A
w/o Intelligent Clearance Sonar System	B

GO TO STEP 16

2.	CHECK DTC OUTPUT (INTELLIGENT CLEARANCE SONAR SYSTEM)

(a) Using the Techstream, check for DTCs according to the prompts on the screen.

Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes

Standard:

The clearance warning ECU assembly does not output DTCs U0232 and U0233 simultaneously.

GO TO INTELLIGENT CLEARANCE SONAR SYSTEM (DTC U0232)

3.	CHECK CAN BUS MAIN WIRE

(a) Turn the power switch off.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition	Result
W5-1 (CA2P) - W5-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω	Below 54 Ω: Short circuit between bus lines
W5-1 (CA2P) - W5-6 (CA2N)		54 to 69 Ω	70 Ω or more: Open circuit in main bus lines
W5-1 (CA2P) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CA2P short to ground
W5-6 (CA2N) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CA2N short to ground
W5-1 (CA2P) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CA2P +B short
W5-6 (CA2N) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CA2N +B short

DLC3

Component with harness connected

(Blind spot monitor sensor RH)

(d) Reconnect the cable to the negative (-) auxiliary battery terminal.

Result	Proceed to
OK	A
Open circuit in CAN main bus lines	B
Short circuit between bus lines	C
Short to ground +B short	D

GO TO STEP 7

GO TO STEP 10

GO TO STEP 13

4.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - BODY GROUND)

Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - POWER SOURCE)

Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK DTC

(a) Turn the power switch off.

(b) Turn the power switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes

OK:

No DTCs are output.

SYMPTOM SIMULATION

REPLACE BLIND SPOT MONITOR SENSOR LH

7.	CHECK FOR OPEN IN CAN BUS MAIN WIRE (No. 36 CAN JUNCTION CONNECTOR)

(a) Disconnect the R122 No. 36 CAN junction connector.

Front view of wire harness connector

(to No. 36 CAN Junction Connector)

to blind spot monitor sensor RH CAN main wire

to blind spot monitor sensor LH CAN main wire

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
R122-3 (CANH) - R122-14(CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω
R122-2 (CANH) - R122-13(CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result	Proceed to
OK	A
NG (to blind spot monitor sensor RH CAN main wire)	B
NG (to blind spot monitor sensor LH CAN main wire)	C

REPLACE No. 6 CAN JUNCTION CONNECTOR

GO TO STEP 9

8.	CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH)

(a) Reconnect the R122 No. 36 CAN junction connector.

(b) Disconnect the W5 blind spot monitor sensor RH connector.

*a	Front view of wire harness connector (to blind spot monitor sensor RH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
W5-1 (CA2P) - W5-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR RH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - No. 6 CAN JUNCTION CONNECTOR)

9.	CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH)

(a) Reconnect the R122 No. 36 CAN junction connector.

(b) Disconnect the W6 blind spot monitor sensor LH connector.

*a	Front view of wire harness connector (to blind spot monitor sensor LH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
W6-1 (CA2P) - W6-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR LH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 6 CAN JUNCTION CONNECTOR)

10.	CHECK FOR SHORT IN CAN BUS WIRES (No. 36 CAN JUNCTION CONNECTOR)

(a) Disconnect the R122 No. 36 CAN junction connector.

Front view of wire harness connector

(to No. 36 CAN Junction Connector)

to blind spot monitor sensor RH CAN main wire

to blind spot monitor sensor LH CAN main wire

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
R122-3 (CANH) - R122-14 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω
R122-2 (CANH) - R122-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

Result	Proceed to
OK	A
NG (to blind spot monitor sensor RH CAN main wire)	B
NG (to blind spot monitor sensor LH CAN main wire)	C

REPLACE No. 6 CAN JUNCTION CONNECTOR

GO TO STEP 12

11.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH)

(a) Reconnect the R122 No. 36 CAN junction connector.

(b) Disconnect the W5 blind spot monitor sensor RH connector.

*a	Front view of wire harness connector (to blind spot monitor sensor RH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
W5-1 (CA2P) - W5-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR RH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - No. 6 CAN JUNCTION CONNECTOR)

12.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)

(a) Reconnect the R122 No. 36 CAN junction connector.

(b) Disconnect the W6 blind spot monitor sensor LH connector.

*a	Front view of wire harness connector (to blind spot monitor sensor LH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
W6-1 (CA2P) - W6-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR LH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 6 CAN JUNCTION CONNECTOR)

13.	CHECK FOR SHORT IN CAN BUS WIRES (No. 36 CAN JUNCTION CONNECTOR)

(a) Disconnect the R122 No. 36 CAN junction connector.

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

DLC3

Front view of wire harness connector

(to No. 36 CAN Junction Connector)

to blind spot monitor sensor RH CAN main wire

to blind spot monitor sensor LH CAN main wire

Standard Resistance:

Tester Connection	Condition	Specified Condition
R122-3 (CANH) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
R122-14 (CANL) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
R122-3 (CANH) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
R122-14 (CANL) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
R122-2 (CANH) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
R122-13 (CANL) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
R122-2 (CANH) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
R122-13 (CANL) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher

Result	Proceed to
OK	A
NG (to blind spot monitor sensor RH CAN main wire)	B
NG (to blind spot monitor sensor LH CAN main wire)	C

REPLACE No. 6 CAN JUNCTION CONNECTOR

GO TO STEP 15

14.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH)

(a) Reconnect the R122 No. 36 CAN junction connector.

(b) Disconnect the W5 blind spot monitor sensor RH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
W5-1 (CA2P) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
W5-6 (CA2N) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
W5-1 (CA2P) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
W5-6 (CA2N) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher

DLC3

Front view of wire harness connector

(to blind spot monitor sensor RH)

REPLACE BLIND SPOT MONITOR SENSOR RH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - No. 6 CAN JUNCTION CONNECTOR)

15.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)

(a) Reconnect the R122 No. 36 CAN junction connector.

(b) Disconnect the W6 blind spot monitor sensor LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
W6-1 (CA2P) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
W6-6 (CA2N) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
W6-1 (CA2P) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
W6-6 (CA2N) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher

DLC3

Front view of wire harness connector

(to blind spot monitor sensor LH)

REPLACE BLIND SPOT MONITOR SENSOR LH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR LH - No. 6 CAN JUNCTION CONNECTOR)

16.	CHECK CAN BUS MAIN WIRE

(a) Turn the power switch off.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition	Result
W5-1 (CA2P) - W5-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω	Below 54 Ω: Short circuit between bus lines
W5-1 (CA2P) - W5-6 (CA2N)		54 to 69 Ω	70 Ω or more: Open circuit in main bus lines
W5-1 (CA2P) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CA2P short to ground
W5-6 (CA2N) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Below 200 Ω: CA2N short to ground
W5-1 (CA2P) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CA2P +B short
W5-6 (CA2N) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher	Below 6 kΩ: CA2N +B short

DLC3

Component with harness connected

(Blind spot monitor sensor RH)

(d) Reconnect the cable to the negative (-) auxiliary battery terminal.

Result	Proceed to
OK	A
Open circuit in CAN main bus lines	B
Short circuit between bus lines	C
Short to ground +B short	D

GO TO STEP 20

GO TO STEP 22

GO TO STEP 24

17.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - BODY GROUND)

Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

18.	CHECK HARNESS AND CONNECTOR (BLIND SPOT MONITOR SENSOR LH - POWER SOURCE)

Click here

REPAIR OR REPLACE HARNESS OR CONNECTOR

19.

CHECK DTC

(a) Turn the power switch off.

(b) Turn the power switch on (IG).

Body Electrical > Blind Spot Monitor Master > Trouble Codes

OK:

No DTCs are output.

SYMPTOM SIMULATION

REPLACE BLIND SPOT MONITOR SENSOR LH

20.	CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR LH)

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

(b) Disconnect the W6 blind spot monitor sensor LH connector.

*a	Front view of wire harness connector (to blind spot monitor sensor LH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
W6-1 (CA2P) -W6-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR LH

21.	CHECK FOR OPEN IN CAN BUS MAIN WIRE (BLIND SPOT MONITOR SENSOR RH)

(a) Reconnect the W6 blind spot monitor sensor LH connector.

(b) Disconnect the W5 blind spot monitor sensor RH connector.

*a	Front view of wire harness connector (to blind spot monitor sensor RH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
W5-1 (CA2P) - W5-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR RH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - BLIND SPOT MONITOR SENSOR LH)

22.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)

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

(b) Disconnect the W6 blind spot monitor sensor LH connector.

*a	Front view of wire harness connector (to blind spot monitor sensor LH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
W6-1 (CA2P) -W6-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR LH

23.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH)

(a) Reconnect the W6 blind spot monitor sensor LH connector.

(b) Disconnect the W5 blind spot monitor sensor RH connector.

*a	Front view of wire harness connector (to blind spot monitor sensor RH)

Standard Resistance:

Tester Connection	Condition	Specified Condition
W5-1 (CA2P) - W5-6 (CA2N)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

REPLACE BLIND SPOT MONITOR SENSOR RH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - BLIND SPOT MONITOR SENSOR LH)

24.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR LH)

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

(b) Disconnect the W6 blind spot monitor sensor LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
W6-1 (CA2P) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
W6-6 (CA2N) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
W6-1 (CA2P) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
W6-6 (CA2N) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher

DLC3

Front view of wire harness connector

(to blind spot monitor sensor LH)

REPLACE BLIND SPOT MONITOR SENSOR LH

25.	CHECK FOR SHORT IN CAN BUS WIRES (BLIND SPOT MONITOR SENSOR RH)

(a) Disconnect the W5 blind spot monitor sensor RH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
W5-1 (CA2P) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
W5-6 (CA2N) - K68-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
W5-1 (CA2P) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
W5-6 (CA2N) - K68-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher

DLC3

Front view of wire harness connector

(to blind spot monitor sensor RH)

REPLACE BLIND SPOT MONITOR SENSOR RH

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (BLIND SPOT MONITOR SENSOR RH - BLIND SPOT MONITOR SENSOR LH)