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

id0902q3393500

Description

BSM OFF switch circuit malfunction
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
1
INSPECT BSM OFF SWITCH CONNECTOR CONDITION
•  Switch the ignition off.
•  Disconnect the negative battery cable.
•  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.
•  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.
•  Clear the DTC for the BSM control module (LH) using the M-MDS.
•  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.
•  Is the same DTC displayed?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the BSM control module (LH).
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.