DTC U0233:00 [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE]

id0902q3393900

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

Diagnostic Procedure

Step | Inspection | Action
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1 | INSPECT BSM CONTROL MODULE (RH) CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Disconnect the 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.
No | Repair or replace the connector, then go to Step 6.
2 | INSPECT BSM CONTROL MODULE (LH) CONNECTOR CONDITION • Disconnect the 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.
No | Repair or replace the connector, then go to Step 6.
3 | INSPECT FOR SHORT TO GROUND IN CAN COMMUNICATION CIRCUIT BETWEEN BSM CONTROL MODULE (LH) AND (RH) • Verify that the BSM control module (LH) and (RH) connectors are disconnected. • Inspect for continuity between the following terminals (wiring harness-side) and body ground: ― BSM control module (RH) terminal A ― 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: • BSM control module (LH) terminal A—BSM control module (RH) terminal A • BSM control module (LH) terminal B—BSM control module (RH) 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.
No | Go to the next step.
4 | INSPECT FOR SHORT TO POWER SUPPLY IN CAN COMMUNICATION CIRCUIT BETWEEN BSM CONTROL MODULE (LH) AND (RH) • Verify that the BSM control module (LH) and (RH) connectors are disconnected. • Reconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Switch the ignition ON (engine off or on). • Measure the voltage at the following terminals (wiring harness-side): ― BSM control module (RH) terminal A ― BSM control module (RH) terminal B • Is the voltage 0 V? | Yes | Go to the next step.
No | Refer to the wiring diagram and verify whether or not there is a common connector between following terminals: • BSM control module (LH) terminal A—BSM control module (RH) terminal A • BSM control module (LH) terminal B—BSM control module (RH) 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 FOR OPEN CIRCUIT IN CAN COMMUNICATION CIRCUIT BETWEEN BSM CONTROL MODULE (LH) AND (RH) • Verify that the BSM control module (LH) and (RH) connectors are disconnected. • Switch the ignition off. • Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Inspect for continuity between the following terminals (wiring harness-side): ― BSM control module (LH) terminal A—BSM control module (RH) terminal A ― BSM control module (LH) terminal B—BSM control module (RH) terminal B • Is there continuity? | Yes | Go to the next step.
No | Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals: • BSM control module (LH) terminal A—BSM control module (RH) terminal A • BSM control module (LH) terminal B—BSM control module (RH) 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 | PERFORM DTC INSPECTION AND VERIFY BSM CONTROL MODULE (RH) MALFUNCTION • Always reconnect all disconnected connectors. • Reconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Clear the DTC for the BSM control module (LH) using the M-MDS. (See CLEARING DTC [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].) • Switch the ignition ON (engine off or on) and wait for 5 s or more. • Retrieve the BSM control module (LH) DTCs using the M-MDS. (See DTC INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].) • Is the same DTC displayed? | Yes | Repeat the inspection from Step 1. • If the malfunction recurs, replace the BSM control module (RH). (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].) Go to the next step.
No | Go to Step 8.
7 | PERFORM DTC INSPECTION AND VERIFY BSM CONTROL MODULE (LH) MALFUNCTION • Clear the DTC for the BSM control module (LH) using the M-MDS. (See CLEARING DTC [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].) • Switch the ignition ON (engine off or on) and wait for 5 s or more. • Retrieve the BSM control module (LH) DTCs using the M-MDS. (See DTC INSPECTION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].) • Is the same DTC displayed? | Yes | Replace the BSM control module (LH), then go to the next step. (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE].)
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 CONNECTOR 10-PIN TYPE].)
No | DTC troubleshooting completed.