DTC U0401:68 [BLIND SPOT MONITORING (BSM) CONTROL MODULE]

id1502b5014300

Description

Error signal received from PCM

Detection condition

•  Blind spot monitoring (BSM) control module (LH) receives the error signal from the PCM for 5 s or more.

Fail-safe

•  Blind spot monitoring (BSM) system is stopped.

Possible cause

•  DTCs are stored in the PCM.

•  DTCs are stored in the instrument cluster.

•  PCM malfunction

•  Instrument cluster malfunction

•  Blind spot monitoring (BSM) control module (LH) malfunction

System wiring diagram

Not applicable

Description	Error signal received from PCM
Detection condition	• Blind spot monitoring (BSM) control module (LH) receives the error signal from the PCM for 5 s or more.
Fail-safe	• Blind spot monitoring (BSM) system is stopped.
Possible cause	• DTCs are stored in the PCM. • DTCs are stored in the instrument cluster. • PCM malfunction • Instrument cluster malfunction • Blind spot monitoring (BSM) control module (LH) malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY PCM DTCs • Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See ON-BOARD DIAGNOSTIC TEST [PCM (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-D 2.2)].) (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.5T)].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See DTC TABLE [PCM (WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5))].) (See DTC TABLE [PCM (SKYACTIV-D 2.2)].) (See DTC TABLE [PCM (SKYACTIV-G 2.5T)].)
1		No	Go to the next step.
2	VERIFY INSTRUMENT CLUSTER DTCs • Retrieve the instrument cluster DTCs using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [INSTRUMENT CLUSTER].)
2		No	Go to the next step.
3	VERIFY IF MALFUNCTIONING LOCATION IS PCM DEPENDING ON REPEATABILITY • 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 5 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 PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [WITHOUT CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].) (See PCM REMOVAL/INSTALLATION [WITH CYLINDER DEACTIVATION (SKYACTIV-G 2.0, SKYACTIV-G 2.5)].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-D 2.2].) (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5T].)
3		No	Go to Step 6.
4	VERIFY IF MALFUNCTIONING LOCATION IS INSTRUMENT CLUSTER DEPENDING ON REPEATABILITY • 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 5 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 instrument cluster, then go to the next step. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)
4		No	Go to Step 6.
5	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 5 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.)
5		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].)
6		No	DTC troubleshooting completed.