HIGH BEAM CONTROL SYSTEM CANNOT BE SET OR CANCELED [HIGH BEAM CONTROL (HBC) SYSTEM]

id1503c1025100

Note

• Due to environmental effects, the system behavior may differ from the driver’s intentions even though the vehicle has no malfunction. To perform symptom troubleshooting, an understanding of the applicable system from the new vehicle instruction is required. For details on the control conditions of the system, refer to the [HIGH BEAM CONTROL (HBC) SYSTEM] operation in the service highlights/technical guide.

Outline

Description

•  The high beam control (HBC) system cannot be set or canceled using the high beam control switch.

Possible cause

•  BCM malfunction

•  High beam control switch malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY ALL SYSTEM DTCs

•  Perform the DTC inspection.
(See DTC INSPECTION.)

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

Go to the next step.

2

INSPECT HIGH BEAM CONTROL SWITCH FOR MALFUNCTION

•  Inspect the applicable part.
(See HIGH BEAM CONTROL SWITCH INSPECTION [(E)].)

•  Is the part normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

(See HIGH BEAM CONTROL SWITCH REMOVAL/INSTALLATION.)

Repair completion verification

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting. (Explain contents of repair to customer)

No

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction is not resolved, replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

Description	• The high beam control (HBC) system cannot be set or canceled using the high beam control switch.
Possible cause	• BCM malfunction • High beam control switch malfunction

Step	Inspection	Results	Action
1	VERIFY ALL SYSTEM DTCs • Perform the DTC inspection. (See DTC INSPECTION.) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
1		No	Go to the next step.
2	INSPECT HIGH BEAM CONTROL SWITCH FOR MALFUNCTION • Inspect the applicable part. (See HIGH BEAM CONTROL SWITCH INSPECTION [(E)].) • Is the part normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See HIGH BEAM CONTROL SWITCH REMOVAL/INSTALLATION.)
Repair completion verification	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification		No	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction is not resolved, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)