Ford Fusion: Exterior Lighting / Autolamps. Diagnosis and Testing
DTC Chart: BCM
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
BCM
DTC Chart
DTC
|
Description
|
Action
|
B1A85:11
|
Ambient Light Sensor: Circuit Short To Ground
|
GO to Pinpoint Test B
|
B1A85:13
|
Ambient Light Sensor: Circuit Open
|
GO to Pinpoint Test B
|
Symptom Chart(s)
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
Symptom Chart: Autolamps
Symptom Chart
Condition
|
Possible Sources
|
Actions
|
A module does not respond to the scan tool
|
-
Fuse
-
Wiring, terminals or connectors
-
Module
|
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
|
The autolamps are inoperative
|
Refer to the Pinpoint Test
|
GO to Pinpoint Test A
|
The autolamps are on continuously
|
Refer to the Pinpoint Test
|
GO to Pinpoint Test B
|
Pinpoint Tests
The Autolamps Are Inoperative
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).
Possible Sources
PINPOINT TEST A : THE AUTOLAMPS ARE INOPERATIVE
The Autolamps Are On Continuously
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 Conditions
|
B1A85:11
|
Ambient Light Sensor: Circuit Short To Ground
|
A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the light sensor input circuit.
|
B1A85:13
|
Ambient Light Sensor: Circuit Open
|
An on-demand DTC that sets when the BCM detects an open or short to voltage from the light sensor input circuit.
|
Possible Sources
-
Wiring, terminals or connectors
-
Light sensor
-
BCM
Visual Inspection and Diagnostic Pre-checks
-
Inspect the headlamp switch for damage.
-
Inspect the light sensor for damage.
PINPOINT TEST B : THE AUTOLAMPS ARE ON CONTINUOUSLY
B1 CHECK FOR BCM (BODY CONTROL MODULE)
DIAGNOSTIC TROUBLE CODE (DTCS) |
-
Using a diagnostic scan tool, perform the BCM self-test.
Is DTC B1A85:11 or B1A85:13 present?
Yes |
For DTC B1A85:11, GO to B3
For DTC B1A85:13, GO to B5
|
|
B2 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (NO DTC (DIAGNOSTIC TROUBLE CODE)
) |
-
Disconnect: Light Sensor C286 (vehicles equipped with DATC).
-
Disconnect: Light Sensor C287 (vehicles equipped with EMTC).
-
Place the headlamp switch in the autolamps on position.
-
Measure:
Click to display connectors
DATC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C286-2
|
|
Ground
|
Click to display connectors
EMTC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C287-2
|
|
Ground
|
Is the voltage approximately 5 volts?
Yes |
INSTALL a new light sensor. REFER to: Light Sensor (417-01 Exterior Lighting, Removal and Installation).
|
|
B3 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (DTC (DIAGNOSTIC TROUBLE CODE)
B1A85:11) |
-
Disconnect: Light Sensor C286 (vehicles equipped with DATC).
-
Disconnect: Light Sensor C287 (vehicles equipped with EMTC).
-
Measure:
Click to display connectors
DATC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C286-2
|
|
Ground
|
Click to display connectors
EMTC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C287-2
|
|
Ground
|
Is the voltage approximately 5 volts?
Yes |
INSTALL a new light sensor. REFER to: Light Sensor (417-01 Exterior Lighting, Removal and Installation).
|
|
B4 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR A SHORT TO GROUND |
-
Measure:
Click to display connectors
DATC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C286-2
|
|
Ground
|
Click to display connectors
EMTC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C287-2
|
|
Ground
|
Is the resistance greater than 10,000 ohms?
|
B5 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (DTC (DIAGNOSTIC TROUBLE CODE)
B1A85:13) |
-
Disconnect: Light Sensor C286 (vehicles equipped with DATC).
-
Disconnect: Light Sensor C287 (vehicles equipped with EMTC).
-
Measure:
Click to display connectors
DATC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C286-2
|
|
Ground
|
Click to display connectors
EMTC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C287-2
|
|
Ground
|
Is the voltage approximately 5 volts?
|
B6 CHECK THE LIGHT SENSOR GROUND |
-
Measure:
Click to display connectors
DATC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C286-2
|
|
C286-4
|
Click to display connectors
EMTC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C287-2
|
|
C287-4
|
Is the voltage approximately 5 volts?
Yes |
INSTALL a new light sensor. REFER to: Light Sensor (417-01 Exterior Lighting, Removal and Installation).
|
|
B7 CHECK THE LIGHT SENSOR GROUND CIRCUIT FOR AN OPEN |
-
Measure:
Click to display connectors
DATC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C286-4
|
|
C2280G-22
|
Click to display connectors
EMTC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C287-4
|
|
C2280G-22
|
Is the resistance less than 3 ohms?
|
B8 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR A SHORT TO VOLTAGE |
-
Disconnect: run/start relay.
-
Connect:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
Run/Start Relay Socket Pin 3
|
|
Run/Start Relay Socket Pin 5
|
-
Measure:
Click to display connectors
DATC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C286-2
|
|
Ground
|
Click to display connectors
EMTC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C287-2
|
|
Ground
|
Is any voltage present?
Yes |
REMOVE the fused jumper wire. REPAIR the circuit.
|
No |
REMOVE the fused jumper wire. GO to B9
|
|
B9 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR AN OPEN |
-
Measure:
Click to display connectors
DATC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C286-2
|
|
C2280G-24
|
Click to display connectors
EMTC
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C287-2
|
|
C2280G-24
|
Is the resistance less than 3 ohms?
|
B10 CHECK FOR CORRECT BCM (BODY CONTROL MODULE)
OPERATION |
-
Disconnect and inspect all BCM 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 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no Technical Service Bulletins (TSBs) address this concern,
Click here to access Guided Routine (BCM). Internet Explorer version 11 or greater is required to perform this Pinpoint Test.
|
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.
|
|
DTC Chart: BCM
Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods (100-00 General Information, Description and Operation)...
Other information:
Removal
Remove the luggage compartment lid moulding.
Refer to: Luggage Compartment Lid Moulding (501-08 Exterior Trim and Ornamentation, Removal and Installation).
Release the luggage compartment lid release switch.
Installation
To install, reverse the removal procedure...
WARNING: Driving while distracted
can result in loss of vehicle control, crash
and injury. We strongly recommend that
you use extreme caution when using any
device that may take your focus off the
road. Your primary responsibility is the
safe operation of your vehicle...