DTC U0515:41 [BCM]

id0902f5071400

Description

Error signal received from start stop unit

Detection condition

•  Check sum error occurred on communication with the BCM and the start stop unit 3 times continuously with the ignition switched ON (engine off or on).

Fail-safe

Exterior lighting system

•  Turn the TNS and headlights LO on, and turn off other exterior light controls.

Auto light system

•  Continue the controls prior to the auto light malfunction detection.

Windshield wiper system

•  Continue the controls prior to the windshield wiper malfunction detection.

Front washer system

•  Stop the front washer control.

Auto wiper system

•  Continue the controls prior to the windshield wiper malfunction detection.

Possible cause

•  Start stop unit malfunction

•  BCM malfunction

System wiring diagram

Not applicable

Description	Error signal received from start stop unit
Detection condition	• Check sum error occurred on communication with the BCM and the start stop unit 3 times continuously with the ignition switched ON (engine off or on).
Fail-safe	Exterior lighting system • Turn the TNS and headlights LO on, and turn off other exterior light controls. Auto light system • Continue the controls prior to the auto light malfunction detection. Windshield wiper system • Continue the controls prior to the windshield wiper malfunction detection. Front washer system • Stop the front washer control. Auto wiper system • Continue the controls prior to the windshield wiper malfunction detection.
Possible cause	• Start stop unit malfunction • BCM malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY BCM DTCs AGAIN • Clear the DTC for the BCM using the M-MDS. (See CLEARING DTC [BCM].) • Retrieve the BCM DTCs using the M-MDS. (See DTC INSPECTION [BCM].) • Is the same DTC displayed?	Yes	Go to the next step.
1		No	Go to Step 5.
2	VERIFY START STOP UNIT DTCs • Retrieve the start stop unit DTCs using the M-MDS. (See DTC INSPECTION [START STOP UNIT].) • Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [START STOP UNIT].)
2		No	Go to the next step.
3	VERIFY IF MALFUNCTIONING LOCATION IS START STOP UNIT DEPENDING ON REPEATABILITY • Clear the DTC for the BCM using the M-MDS. (See CLEARING DTC [BCM].) • Retrieve the BCM DTCs using the M-MDS. (See DTC INSPECTION [BCM].) • Is the same DTC displayed?	Yes	Replace the start stop unit, then go to the next step. (See START STOP UNIT REMOVAL/INSTALLATION.)
3		No	Go to Step 5.
4	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear the DTC for the BCM using the M-MDS. (See CLEARING DTC [BCM].) • Retrieve the BCM DTCs using the M-MDS. (See DTC INSPECTION [BCM].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.) Go to the next step.
4		No	Go to the next step.
5	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 [BCM].)
5		No	DTC troubleshooting completed.