Is it related to the DRL relay and where is the BMC located

Question edited for clarity.
Question moved to model category.

Toyota Nation thinks fuses and DRL are headlight on low power.

https://www.toyotanation.com/threads/drl-relay.1640612/

eBay thinks it does.

https://www.ebay.ca/itm/164758754547

The Fuse and Relays diagram says No

Toyota Camry (XV40; 2007-2011) fuses and relays

Fuse Box Diagrams https://fuse-box.info > toyota > toyota-camry-xv40-20...

The fuse box is located under the instrument panel (on the driver's side), under the cover. The location of the fuses in the passenger compartment: Toyota Camry ...
Daytime running Lights are a function of the Body control Module.

https://www.google.com/search?q=2011+Toyota+Camry+LE+DRL+relay+location

..

Daytime Running Lamps
Daytime running lamps are standard on all Saturn models. The DRL relay is located in the UHFB. The coil side of the DRL relay receives battery voltage through the left headlamp fuse. Battery voltage flows through the DRL relay coil to the body control module through CKT 592. The BCM will ground CKT 592 when DRL is required. The BCM uses ignition, park lamp, headlamp, high beam and park brake inputs to control DRL. The DRL will be enabled anytime the ignition is in the RUN position, the headlamp switch is Off and the park brake switch is Off.
Battery voltage is supplied through the left headlamp fuse to CKT 40 to the left high beam lamp. Voltage flows through the left high beam lamp to the IPFB through CKT 1200. Voltage flows to the right DRL relay located in the IPFB through CKT 593. The BCM provides ground to CKT 592 to energize the relay. Voltage flows through the closed contacts of the DRL relay to ground through CKT 150 to the forward lamp ground splice pack. This circuit results in both high beam lamps being connected in series, which allows the high beam lights to operate at half brightness.
The BCM will turn Off the DRL relay when it sees any of the following inputs:
• Gear selector in PARK
• Headlamps ON
• Parking brake ON
• Ignition not in the RUN position
• When automatic lighting control is ON and it is dark outside
The BCM uses the high beam input to determine if the DRL functions are working. If the DRL functions are not operating properly a diagnostic trouble code may be set. Refer to diagnosis in this section for further information.


Before having the BCM repaired as you say ,was it checked for DTC'S - diagnostic trouble codes ? An who repaired it ?

DTC B2600

The daytime running lamps (DRL) are controlled by the body control module (BCM). The BCM grounds the DRL relay control circuit in order to energize the DRL relay coil. This action provides a path to ground for the RH and LH headlamps through the DRL relay and the DRL resistor. The DRL resistor reduces the intensity of the low beam headlamps for DRL operation. The BCM monitors the low and high beam circuits to ensure that the DRLs are operating properly. If the BCM senses that the DRLs are not operating properly, DTC B2600 is set.

The DRL relay or DRL resistor is probably the problem .

DTC B2602

Circuit Description
Daytime running lamps (DRL) are controlled by the body control module (BCM) based on input from the high beam headlamp circuit 1201, the low beam headlamp circuit 1200, the parking brake circuit 1134 and ignition switch state.
When DRL operation is desired, the BCM switches circuit 592 to ground. This action energizes the DRL relay. When energized, the DRL relay operates the left high beam headlamp and right high beam headlamp as a series circuit (one-half of battery voltage across each high beam headlamp).
When DRL operation is not desired, the BCM does not provide ground for the DRL relay. When not energized (as when high beam headlamps are desired) the DRL relay operates the right and left high beam headlamps as a parallel circuit (full battery voltage across each high beam headlamp).
For DRL operation, the parking brake must be fully released, the ignition switch must be in the RUN position and headlamp switch must be in the OFF position. Under normal operating conditions, the feedback voltage to the BCM measured at circuit 1200 is 6-8 volts.


DTC B2603


Your best bet ,take it to a qualified repair shop.

Doesn't use a DRL module . Has DRL relay .
Symptom Chart Condition Possible Sources Action

• The daytime running lamps are inoperative.

• Fuse
• Circuit(s)
• Daytime running lamps (DRL) relay
• Light switch

• Go To Pinpoint Test A .

Free wiring diagrams here http://www.bbbind.com/free-tsb/ Enter vehicle info. Year , make , model an engine . Under system click on lighting , then under subsystem click on daytime running lamps . Click the search button then the blue links . Looking at the wiring diagram i see the DRL relay is located in the BJB - this is the fuse / relay box in the engine compartment . To see location under system click on electrical distribution ,then on junction block . picture of fuse box shows location .

There is no DRL relay , has a lamp control module .
The daytime running lamps (DRL) activate under the following conditions:
?€¢
The ignition switch is in the RUN position.

?€¢
The ambient light sensor indicates daylight.

?€¢
The vehicle is not in the PARK position.

When the above conditions are met, the lamp control module (LCM) supplies battery positive voltage (B+) to the low beam headlamps through CKT 589 (GRY), the DRL resistor, and CKT 12 (TAN). The DRL resistor reduces the voltage supplied by the LCM. The low beam headlamps light at a reduced intensity. The DRL disable if the vehicle is placed in the PARK position. When the ambient light sensor indicates darkness, the low beam headlamps automatically switch from a reduced intensity to a regular intensity.
Lamp Control Module (LCM)
In the center of the IP, below the center heater outlets

for the daytime running light relay location, check the engine compartment fuse/relay panel.

check fuse to DRL lamp module check fuse auto lamp module.should see fuses locations in the owners manual.

The wiring diagram does not show a stand alone drl module for the 03 f150. However it shows 2 drl
relays located in aux. relay box #2 located behind the right side of the dash, left of the glove box.
Also there is the drl resistor located behind the grill, right of the left headlight. Relay #1 is fused at
fuse #5-15a in the fuse block under the left dash. Relay #2 uses fuse #26-10a under left of dash.
Hope this helps.

It sounds like your DRL RELAY/Headlight relay. I had this happen with a 2000.

Please rate me if this helps You.

Here is some info that I hope is helpful to you.

This first part is how to disable the DRL
TOYOTA. From the Toyota technical service bulletin EL011-00 Web site for specific models determine where the module is; either the DRL relay or the body ECU, connector number, pin #. Oct 6,2000.

Avalon 1999 DRL relay D4 pin 1
Avalon 2000 body ECU B5 pin 6
Camry S/D 99* DRL relay D6 pin 23
Camry S/D 00* DRL relay D6 pin 10 *twilight sentinel
Camry Solara99/00* DRL relay D6 pin 23
Celica 2000* body ECU B6 pin 17
Corolla 99/00* DRL relay D3 pin 23
ECHO 2000 DRL relay D2 pin 12
4Runner 2000 DRL relay D8 pin 2
Land Cruiser 99/00 DRL relay D8 pin 2
MR2 Spyder 2000 DRL relay D2 pin 12
RAV4 99/00 DRL relay D17 pin 2
Sierra 99/00 DRL relay D4 pin 2
Tacoma 2000 DRL relay D8 pin 2
Tundra 2000 DRL relay D7 pin 2
-disconnect battery- Then remove the wire with pin attached and tape to the harness. (consider just cut and tape the wire) -check operation- [except the 2000 MY-Avalon, additionally you need to ground the wire at the module end of the cut wire]


And here is the Headlamp relay part number.

ACDELCO E1717C [RELAY-HEADLAMP] RELAY,HDLP OEM#89057700 ALL MAKES

your relays are located under the hood in a small black plastic box about 6 to 8 inches square. Remove the cover and it should have a diagram on the inside of the cover. They are easy to change, they just plug in