DTC U3003:16 [BLIND SPOT MONITORING (BSM) SYSTEM]

id09021o066900

Description

Blind spot monitoring (BSM) control module (LH) low power supply voltage input

Detection condition

•  Blind spot monitoring (BSM) control module (LH) power supply circuit voltage of 9 V or less is detected for 1 s or more with the ignition switched ON (engine off or on).

Fail-safe

•  Blind spot monitoring (BSM) system is stopped.

Possible cause

•  DTCs are stored in the PCM.

•  Battery malfunction

•  Generator malfunction

•  Blind spot monitoring (BSM) control module (LH) connector or terminal malfunction

•  Blind spot monitoring (BSM) control module (LH) power supply circuit malfunction

―  Short to ground in wiring harness between C/U IG1 15 A fuse and blind spot monitoring (BSM) control module (LH) terminal I

―  C/U IG1 15 A fuse malfunction

―  Open circuit in wiring harness between IG1 relay terminal C and blind spot monitoring (BSM) control module (LH) terminal I

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

Description	Blind spot monitoring (BSM) control module (LH) low power supply voltage input
Detection condition	• Blind spot monitoring (BSM) control module (LH) power supply circuit voltage of 9 V or less is detected for 1 s or more with the ignition switched ON (engine off or on).
Fail-safe	• Blind spot monitoring (BSM) system is stopped.
Possible cause	• DTCs are stored in the PCM. • Battery malfunction • Generator malfunction • Blind spot monitoring (BSM) control module (LH) connector or terminal malfunction • Blind spot monitoring (BSM) control module (LH) power supply circuit malfunction ― Short to ground in wiring harness between C/U IG1 15 A fuse and blind spot monitoring (BSM) control module (LH) terminal I ― C/U IG1 15 A fuse malfunction ― Open circuit in wiring harness between IG1 relay terminal C and blind spot monitoring (BSM) control module (LH) terminal I • Blind spot monitoring (BSM) control module (LH) malfunction

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY PCM DTCs • Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 1.3, SKYACTIV-G 1.5].) (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-D 1.5].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [SKYACTIV-G 1.3, SKYACTIV-G 1.5].) (See DTC TABLE [SKYACTIV-D 1.5].)
1		No	Go to the next step.
2	INSPECT BATTERY • Inspect the battery. (See BATTERY INSPECTION.) • Is the battery normal?	Yes	Go to the next step.
2		No	Recharge or replace the battery, then go to Step 6. (See BATTERY RECHARGING.) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 1.3, SKYACTIV-G 1.5].) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-D 1.5].)
3	INSPECT GENERATOR • Inspect the generator. (See GENERATOR INSPECTION [WITHOUT i-ELOOP (SKYACTIV-G 1.3, SKYACTIV-G 1.5)].) (See GENERATOR INSPECTION [WITHOUT i-ELOOP (SKYACTIV-D 1.5)].) (See GENERATOR INSPECTION [WITH i-ELOOP (SKYACTIV-G 1.3, SKYACTIV-G 1.5)].) (See GENERATOR INSPECTION [WITH i-ELOOP (SKYACTIV-D 1.5)].) • Is the generator normal?	Yes	Go to the next step.
3		No	Replace the generator, then go to Step 6. (See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-G 1.3, SKYACTIV-G 1.5)].) (See GENERATOR REMOVAL/INSTALLATION [WITHOUT i-ELOOP (SKYACTIV-D 1.5)].) (See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-G 1.3, SKYACTIV-G 1.5)].) (See GENERATOR REMOVAL/INSTALLATION [WITH i-ELOOP (SKYACTIV-D 1.5)].)
4	INSPECT BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) CONNECTOR CONDITION • Switch the ignition off. • Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) • Disconnect the blind spot monitoring (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.
4		No	Repair or replace the connector, then go to Step 6.
5	VERIFY BLIND SPOT MONITORING (BSM) CONTROL MODULE (LH) POWER SUPPLY VOLTAGE • Always reconnect all disconnected connectors. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) • Display the PID VPWR_L using the M-MDS. (See PID/DATA MONITOR INSPECTION [BLIND SPOT MONITORING (BSM) SYSTEM].) • Is the voltage B+?	Yes	Go to the next step.
5		No	Inspect the C/U IG1 15 A fuse. • If the fuse is blown: ― Refer to the wiring diagram and verify whether or not there is a common connector between C/U IG1 15 A fuse and blind spot monitoring (BSM) control module (LH) terminal I. 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. • Replace the fuse. • If the fuse is damaged: ― Replace the fuse. • If the fuse is normal: ― Refer to the wiring diagram and verify whether or not there is a common connector between IG1 relay terminal C and blind spot monitoring (BSM) control module (LH) terminal I. 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	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Always reconnect all disconnected connectors. • Connect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.) • Clear the DTC for the blind spot monitoring (BSM) control module using the M-MDS. (See CLEARING DTC [BLIND SPOT MONITORING (BSM) SYSTEM].) • Switch the ignition ON (engine off or on) and wait for 2.5 s or more. • Retrieve the blind spot monitoring (BSM) control module DTCs using the M-MDS. (See DTC INSPECTION [BLIND SPOT MONITORING (BSM) SYSTEM].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the blind spot monitoring (BSM) control module (LH). (See BLIND SPOT MONITORING (BSM) CONTROL MODULE REMOVAL/INSTALLATION.) Go to the next step.
6		No	Go to the next step.
7	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) SYSTEM].)
7		No	DTC troubleshooting completed.