DTC B10A6:62 [BCM]

id0902f5068000

Description

Light switch position signal error

Detection condition

•  The BCM detected a light switch position signal error received from the start stop unit for 5 s or more 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.

Possible cause

•  Start stop unit malfunction

•  Light switch malfunction

•  BCM malfunction

System wiring diagram

Not applicable

Description	Light switch position signal error
Detection condition	• The BCM detected a light switch position signal error received from the start stop unit for 5 s or more 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.
Possible cause	• Start stop unit malfunction • Light switch 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].) • Switch the ignition ON (engine off or on) and wait for 5 s or more. • 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 6.
2	DETERMINE MALFUNCTIONING LOCATION BY PERFORMING PID/DATA MONITOR INSPECTION • Using the M-MDS, display the following PIDs for the start stop unit. (See PID/DATA MONITOR INSPECTION [START STOP UNIT].) ― H/L_SW_OFF ― H/L_SW_HI ― H/L_SW_LOW ― H/L_SW_TNS ― H/L_SW_PASS • Does the PID monitoring value switch correctly according to the light switch operation?	Yes	Go to Step 4. (Circuit between light switch and start stop unit is normal.)
2		No	Go to the next step.
3	INSPECT LIGHT SWITCH • Inspect the light switch. (See LIGHT SWITCH INSPECTION.) • Is the light switch normal?	Yes	Replace the start stop unit, then go to Step 5. (See START STOP UNIT REMOVAL/INSTALLATION.)
3		No	Replace the light switch, then go to Step 5. (See LIGHT SWITCH REMOVAL/INSTALLATION.)
4	DETERMINE MALFUNCTIONING LOCATION BY PERFORMING PID/DATA MONITOR INSPECTION • Using the M-MDS, display the following PIDs for the BCM. (See PID/DATA MONITOR INSPECTION [BCM].) ― H/L_SW_OFF ― H/L_SW_HI ― H/L_SW_LOW ― H/L_SW_TNS ― H/L_SW_PASS • Does the PID monitoring value switch correctly according to the light switch operation?	Yes	Go to the next step. (circuit between start stop unit and BCM is normal)
4		No	Replace the start stop unit, then go to the next Step. (See START STOP UNIT REMOVAL/INSTALLATION.)
5	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear the DTC for the BCM using the M-MDS. (See CLEARING DTC [BCM].) • Switch the ignition ON (engine off or on) and wait for 5 s or more. • 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.
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 [BCM].)
6		No	DTC troubleshooting completed.