Refer to Wiring Diagrams Cell 85 for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).
DTC Fault Trigger Conditions
DTC |
Description |
Fault Trigger Condition |
BCM B124A:11 |
Right Daytime Running Light: Circuit Short To Ground |
A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the RH
DRL voltage supply circuit.
|
BCM B124A:15 |
Right Daytime Running Light: Circuit Short To Battery Or Open |
A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the RH
DRL voltage supply circuit.
|
BCM B124B:11 |
Left Daytime Running Light: Circuit Short To Ground |
A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH
DRL voltage supply circuit.
|
BCM B124B:15 |
Left Daytime Running Light: Circuit Short To Battery Or Open |
A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH
DRL voltage supply circuit.
|
Possible Sources
- Wiring, terminals or connectors
- Headlamp assembly
-
LED control module
-
BCM
|
NOTE:
Before beginning this test, refer to Description and Operation in this section for proper DRL operation.
|
A1 CHECK THE OPERATION OF THE PARKING LAMPS |
-
For low series and police vehicles, place the
headlamp switch in the HEADLAMPS position and observe the low beam
headlamps.
-
Except low series and police vehicles, place the
headlamp switch in the PARKING LAMPS position and observe the front
parking lamps.
Do the lamps operate correctly?
Yes |
If the one or both of the DRL are inoperative, GO to A3
If the one or both of the DRL are always on, GO to A2
|
No |
For low series and police vehicles, REFER to: Headlamps (417-01 Exterior Lighting, Diagnosis and Testing).
Except low series and police vehicles, REFER to: Parking, Rear and License Plate Lamps (417-01 Exterior Lighting, Diagnosis and Testing).
|
|
A2 CHECK THE BCM (BODY CONTROL MODULE)
DRL (DAYTIME RUNNING LAMPS)
CIRCUIT FOR A SHORT TO VOLTAGE |
Do the DRL continue to illuminate?
Yes |
REPAIR the DRL circuit in question.
|
|
A3 CHECK THAT THE DRL (DAYTIME RUNNING LAMPS)
ARE ENABLED |
-
For conventional DRL, check if the DRL are enabled through a diagnostic scan tool.
-
For configurable DRL, check if the DRL are enabled through the IPC.
Are the DRL enabled?
No |
For conventional DRL, Using a diagnostic scan tool, ENABLE the DRL.
For configurable DRL, enable the DRL. REFER to the Owner's Literature for information on enabling the DRL.
|
|
A4 CHECK THE DRL (DAYTIME RUNNING LAMPS)
CIRCUIT FOR VOLTAGE |
-
Place the headlamp switch in the OFF position.
-
Disconnect:LH Headlamp C1284 or RH Headlamp C1285.
-
Make sure there is enough ambient lighting that the
autolamps system will not automatically illuminate the headlamps.
-
Place the headlamp switch in the AUTOLAMPS position.
-
Measure:
Click to display connectors
LH Headlamp
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1284-4
|
|
Ground
|
Click to display connectors
RH Headlamp
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1285-4
|
|
Ground
|
Is the voltage greater than 11 volts?
|
A5 REPEAT THE ON-DEMAND SELF-TEST AND CHECK THE DRL (DAYTIME RUNNING LAMPS)
CIRCUIT FOR VOLTAGE |
-
Place the headlamp switch in the OFF position.
-
Using a diagnostic scan tool, perform the BCM self-test.
-
Clear the Diagnostic Trouble Codes (DTCs) and repeat
the self-test (required to enable the lamp output driver).
-
Place the headlamp switch in the AUTOLAMPS position.
-
Measure:
Click to display connectors
LH Headlamp
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1284-4
|
|
Ground
|
Click to display connectors
RH Headlamp
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1285-4
|
|
Ground
|
Is the voltage greater than 11 volts?
|
A6 CHECK THE LED (LIGHT EMITTING DIODE)
CONTROL MODULE |
-
Place the headlamp switch in the OFF position.
-
Connect: Inoperative LH Headlamp C1284 or RH Headlamp C1285 if previously disconnected.
-
Connect: BCM
C2280F if previously disconnected.
-
CLEAR the Diagnostic Trouble Codes (DTCs), REPEAT
the self-test (required to enable the lamp output driver) and cycle the
ignition OFF and ON. REPEAT the self-test.
-
Activate the hazard flasher lamp function.
-
Operate the system and determine if the concern is still present.
Is the concern still present or does any Diagnostic Trouble Codes (DTCs) return?
Yes |
REMOVE the known good LED controlmodule. INSTALL a new headlamp assembly. REFER to: Headlamp Assembly (417-01 Exterior Lighting, Removal and Installation).
|
No |
REMOVE the known good LED control module. INSTALL a new LED control module. REFER to: Light Emitting Diode (LED) Control Module (417-01 Exterior Lighting, Removal and Installation).
|
|
A7 CHECK THE DRL (DAYTIME RUNNING LAMPS)
CIRCUIT FOR A SHORT TO GROUND |
-
Place the headlamp switch in the OFF position.
-
Measure:
Click to display connectors
LH Headlamp
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1284-4
|
|
Ground
|
Click to display connectors
RH Headlamp
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1285-4
|
|
Ground
|
Is the resistance greater than 10,000 ohms?
No |
REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC
U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and
REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM. REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
|
|
A8 CHECK THE DRL (DAYTIME RUNNING LAMPS)
CIRCUIT FOR AN OPEN |
-
Measure:
Click to display connectors
LH Headlamp
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1284-4
|
|
C2280F-40
|
Click to display connectors
RH Headlamp
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C1285-4
|
|
C2280F-36
|
Is the resistance less than 3 ohms?
|
A9 CHECK FOR CORRECT BCM (BODY CONTROL MODULE)
OPERATION |
-
Disconnect and inspect all BCM and all related in-line connectors.
-
Repair:
-
corrosion (install new connector or terminals – clean module pins)
-
damaged or bent pins – install new terminals/pins
-
pushed-out pins – install new pins as necessary
-
Reconnect the BCM and all related in-line connectors. Make sure they seat and latch correctly.
-
Operate the system and determine if the concern is still present.
Is the concern still present?
Yes |
CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA.
If a service article exists for this concern, DISCONTINUE this test and
FOLLOW the service article instructions. If no service articles address
this concern, INSTALL a new BCM. REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
|
No |
The system is operating correctly at this time. The
concern may have been caused by module connections. ADDRESS the root
cause of any connector or pin issues.
|
|