Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001FAI7
Model Year Start: 2019 Model: RAV4 Prod Date Range: [11/2018 -           ]
Title: PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: U0233; Lost Communication with Blind Spot Monitor Master Module; 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]

DTC

U0233

Lost Communication with Blind Spot Monitor Master 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

U0233

Lost Communication with Blind Spot Monitor Master Module

The blind spot monitor sensor (slave) cannot receive signals from the blind spot monitor sensor (master)
  • Blind spot monitor sensor LH
  • Blind spot monitor sensor RH
  • Wire harness or connector

CAUTION / NOTICE / HINT

NOTICE:

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

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 DTC OUTPUT

(a) Turn the ignition switch off.

(b) Turn the ignition switch to ON.

(c) Clear the DTCs.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: DTC CHECK / CLEAR

Body Electrical > Blind Spot Monitor Slave > Clear DTCs

(d) Check for DTCs.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: DTC CHECK / CLEAR

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result

Proceed to

DTC U0233 is output

A

No DTCs are output

B
B

USE SIMULATION METHOD TO CHECK

A

2.

REPLACE BLIND SPOT MONITOR SENSOR LH

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL 2020 - 2021 MY RAV4 RAV4 HV [10/2019 - 12/2021]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

NEXT

3.

CHECK DTC OUTPUT

(a) Check for DTCs.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SYSTEM: DTC CHECK / CLEAR

Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result

Proceed to

DTC U0233 is output

A

No DTCs are output

B
A

REPLACE BLIND SPOT MONITOR SENSOR RH 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL 2020 - 2021 MY RAV4 RAV4 HV [10/2019 - 12/2021]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; PARK ASSIST / MONITORING: BLIND SPOT MONITOR SENSOR: REMOVAL

B

END (BLIND SPOT MONITOR SENSOR RH WAS DEFECTIVE)