DTC U0233:00 [BLIND SPOT MONITORING (BSM) CONTROL MODULE]

id1502b5014200

Description	Communication error with blind spot monitoring (BSM) control module (RH)
Detection condition	• No communication between blind spot monitoring (BSM) control module (RH) and (LH) for 1 s or more.
Fail-safe	• Blind spot monitoring (BSM) system is stopped.
Possible cause	• Blind spot monitoring (BSM) control module (RH) connector or terminal malfunction • Blind spot monitoring (BSM) control module (LH) connector or terminal malfunction • Short to ground in wiring harness between the following terminals: ? Blind spot monitoring (BSM) control module (RH) terminal A—Blind spot monitoring (BSM) control module (LH) terminal A ? Blind spot monitoring (BSM) control module (RH) terminal B—Blind spot monitoring (BSM) control module (LH) terminal B • Short to power supply in wiring harness between the following terminals: ? Blind spot monitoring (BSM) control module (RH) terminal A—Blind spot monitoring (BSM) control module (LH) terminal A ? Blind spot monitoring (BSM) control module (RH) terminal B—Blind spot monitoring (BSM) control module (LH) terminal B • Open circuit in wiring harness between the following terminals: ? Blind spot monitoring (BSM) control module (RH) terminal A—Blind spot monitoring (BSM) control module (LH) terminal A ? Blind spot monitoring (BSM) control module (RH) terminal B—Blind spot monitoring (BSM) control module (LH) terminal B • Blind spot monitoring (BSM) control module (RH) malfunction • Blind spot monitoring (BSM) control module (LH) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT BLIND SPOT MONITORING (BSM) CONTROL MODULE (RH) CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Disconnect the blind spot monitoring (BSM) control module (RH) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
1		No	Repair or replace the connector, then go to Step 6.
2	INSPECT BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) CONNECTOR CONDITION • Disconnect the blind spot monitoring (BSM) control module (LH) connector. • Inspect the connector engagement and connection condition and inspect the terminals for damage, deformation, corrosion, or disconnection. • Is the connector normal?	Yes	Go to the next step.
2		No	Repair or replace the connector, then go to Step 6.
3	INSPECT CAN COMMUNICATION CIRCUIT BETWEEN BLIND SPOT MONITORING (BSM) CONTROL MODULE (RH) AND (LH) FOR SHORT TO GROUND • Verify that the blind spot monitoring (BSM) control module (RH) and (LH) connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ? Blind spot monitoring (BSM) control module (RH) terminal A ? Blind spot monitoring (BSM) control module (RH) terminal B • Is there continuity?	Yes	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Blind spot monitoring (BSM) control module (RH) terminal A—Blind spot monitoring (BSM) control module (LH) terminal A • Blind spot monitoring (BSM) control module (RH) terminal B—Blind spot monitoring (BSM) control module (LH) terminal B If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to ground. Go to Step 6.
3		No	Go to the next step.
4	INSPECT CAN COMMUNICATION CIRCUIT BETWEEN BLIND SPOT MONITORING (BSM) CONTROL MODULE (RH) AND (LH) FOR SHORT TO POWER SUPPLY • Verify that the blind spot monitoring (BSM) control module (RH) and (LH) connectors are disconnected. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Switch the ignition ON (engine off or on). • Measure the voltage at the following terminals (wiring harness-side): ? Blind spot monitoring (BSM) control module (RH) terminal A ? Blind spot monitoring (BSM) control module (RH) terminal B • Is the voltage 0 V?	Yes	Go to the next step.
4		No	Refer to the wiring diagram and verify whether or not there is a common connector between following terminals: • Blind spot monitoring (BSM) control module (RH) terminal A—Blind spot monitoring (BSM) control module (LH) terminal A • Blind spot monitoring (BSM) control module (RH) terminal B—Blind spot monitoring (BSM) control module (LH) terminal B If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has a short to power supply. Go to Step 6.
5	INSPECT CAN COMMUNICATION CIRCUIT BETWEEN BLIND SPOT MONITORING (BSM) CONTROL MODULE (RH) AND (LH) FOR OPEN CIRCUIT • Switch the ignition off. • Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Verify that the blind spot monitoring (BSM) control module (RH) and (LH) connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side): ? Blind spot monitoring (BSM) control module (RH) terminal A—Blind spot monitoring (BSM) control module (LH) terminal A ? Blind spot monitoring (BSM) control module (RH) terminal B—Blind spot monitoring (BSM) control module (LH) terminal B • Is there continuity?	Yes	Go to the next step.
5		No	Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • Blind spot monitoring (BSM) control module (RH) terminal A—Blind spot monitoring (BSM) control module (LH) terminal A • Blind spot monitoring (BSM) control module (RH) terminal B—Blind spot monitoring (BSM) control module (LH) terminal B If there is a common connector: • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit. • Repair or replace the malfunctioning part. If there is no common connector: • Repair or replace the wiring harness which has an open circuit. Go to the next step.
6	VERIFY IF MALFUNCTIONING LOCATION IS BLIND SPOT MONITORING (BSM) CONTROL MODULES (RH) DEPENDING ON REPEATABILITY • Always reconnect all disconnected connectors. • Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.) • Clear the DTC for the blind spot monitoring (BSM) control module (LH) using the M-MDS. (See CLEARING DTC [BLIND SPOT MONITORING (BSM) CONTROL MODULE].) • Switch the ignition ON (engine off or on) and wait for 1 s or more. • Retrieve the blind spot monitoring (BSM) control module (LH) DTCs using the M-MDS. (See DTC INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the blind spot monitoring (BSM) control module (RH). (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.) Go to the next step.
6		No	Go to Step 8.
7	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear the DTC for the blind spot monitoring (BSM) control module (LH) using the M-MDS. (See CLEARING DTC [BLIND SPOT MONITORING (BSM) CONTROL MODULE].) • Switch the ignition ON (engine off or on) and wait for 1 s or more. • Retrieve the blind spot monitoring (BSM) control module (LH) DTCs using the M-MDS. (See DTC INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE].) • Is the same DTC displayed?	Yes	Replace the blind spot monitoring (BSM) control module (LH), then go to the next step. (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)
7		No	Go to the next step.
8	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [BLIND SPOT MONITORING (BSM) CONTROL MODULE].)
8		No	DTC troubleshooting completed.