DTC U3000:4A [BLIND SPOT MONITORING (BSM)]

id0902i3393500

System malfunction location

BSM control module assembly malfunction

Detection condition

•  The left and right BSM control modules are installed in reverse, or an open circuit is detected in the BSM control module circuit.

Fail-safe

—

Possible cause

•  The BSM control modules (LH) and (RH) are installed in reverse.

•  Malfunction in BSM control module (LH) connector or terminal

•  Open circuit in wiring harness between the following terminals:

―  BSM control module (LH) terminal A and body ground

―  BSM control module (LH) terminal E and body ground

•  Malfunction in BSM control module (RH) connector or terminal

•  Open circuit in wiring harness between BSM control module (RH) terminal A and body ground

•  BSM control module malfunction

System malfunction location	BSM control module assembly malfunction
Detection condition	• The left and right BSM control modules are installed in reverse, or an open circuit is detected in the BSM control module circuit.
Fail-safe	—
Possible cause	• The BSM control modules (LH) and (RH) are installed in reverse. • Malfunction in BSM control module (LH) connector or terminal • Open circuit in wiring harness between the following terminals: ― BSM control module (LH) terminal A and body ground ― BSM control module (LH) terminal E and body ground • Malfunction in BSM control module (RH) connector or terminal • Open circuit in wiring harness between BSM control module (RH) terminal A and body ground • BSM control module malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY IF LEFT AND RIGHT BSM CONTROL MODULES ARE INSTALLED IN REVERSE • Verify that the left and right indication labels are attached to the BSM control modules. (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.) • Are the left and right BSM control modules installed correctly?	Yes	Go to the next step.
1		No	Install the BSM control modules in their proper positions, then go to Step 6.
2	INSPECT BSM CONTROL MODULE (LH) CONNECTOR CONDITION • Switch the ignition to off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • 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.
2		No	Repair or replace the connector, then go to Step 6.
3	INSPECT BSM CONTROL MODULE (LH) CIRCUIT FOR OPEN CIRCUIT • Verify that the BSM control module (LH) connector is disconnected. • Inspect the wiring harness between the following terminals (vehicle wiring harness side) and body ground for continuity. ― BSM control module (LH) terminal A ― BSM control module (LH) terminal E • Is there continuity?	Yes	Go to the next step.
3		No	Repair or replace the wiring harness which has an open circuit, then go to Step 6.
4	INSPECT BSM CONTROL MODULE (RH) CONNECTOR CONDITION • 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.
4		No	Repair or replace the connector, then go to Step 6.
5	INSPECT BSM CONTROL MODULE (RH) CIRCUIT FOR OPEN CIRCUIT • Verify that the BSM control module (RH) connector is disconnected. • Inspect for continuity between BSM control module (RH) terminal A (vehicle wiring harness side) and body ground. • Is there continuity?	Yes	Go to the next step.
5		No	Repair or replace the wiring harness which has an open circuit, then go to the next step.
6	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Reconnect all the disconnected connectors. • Reconnect the disconnected negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) • Clear BSM control module DTCs using the M-MDS. (See CLEARING DTC [BLIND SPOT MONITORING (BSM)].) • Perform the DTC inspection for the BSM control module using the M-MDS. (See DTC INSPECTION [BLIND SPOT MONITORING (BSM)].) • Is DTC U3000:4A displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the BSM control module, then go to the next step. (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.)
6		No	Go to the next step.
7	VERIFY IF OTHER DTCs DISPLAYED • Are any other DTCs displayed?	Yes	Repair the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [BLIND SPOT MONITORING (BSM)].)
7		No	DTC troubleshooting completed.