DTC U3000:4A [BLIND SPOT MONITORING (BSM) CONTROL MODULE CONNECTOR 10-PIN TYPE]

id0902q3393500

Description | BSM OFF switch circuit malfunction
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Detection condition | • BSM control module (LH) detects a short to ground in the BSM OFF switch circuit for 180 s or more.
Fail-safe function | • Blind spot monitoring (BSM) system is stopped.
Possible cause | • BSM OFF switch connector or terminal malfunction • BSM OFF switch malfunction • BSM control module (LH) connector or terminal malfunction • Short to ground in wiring harness between BSM control module (LH) terminal H and BSM OFF switch terminal I (L.H.D.)/C (R.H.D.) • BSM control module (LH) malfunction

Diagnostic procedure

Step | Inspection | Action
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1 | INSPECT BSM OFF SWITCH CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7].) • Disconnect the BSM OFF switch 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 5.
2 | INSPECT BSM OFF SWITCH • Inspect the BSM OFF switch. (See BLIND SPOT MONITORING (BSM) OFF SWITCH INSPECTION.) • Is the BSM OFF switch normal? | Yes | Go to the next step.
No | Replace the cluster switch, then go to Step 5. (See CLUSTER SWITCH REMOVAL/INSTALLATION.)
3 | 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 5.
4 | INSPECT BSM OFF SWITCH SIGNAL CIRCUIT FOR SHORT TO GROUND • Verify that the BSM OFF switch and BSM control module (LH) connectors are disconnected. • Inspect for continuity between BSM OFF switch terminal I (L.H.D.)/C (R.H.D.) (wiring harness-side) and body ground. • Is there continuity? | Yes | Refer to the wiring diagram and verify whether or not there is a common connector between BSM control module (LH) terminal H and BSM OFF switch terminal I (L.H.D.)/C (R.H.D.). 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 the next step.
No | Go to the next step.
5 | VERIFY DTC TROUBLESHOOTING COMPLETED • 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 180 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 (LH). (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 the next step.
6 | 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.