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

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

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

• Light sensor
• BCM

A1 CHECK THE MANUAL HEADLAMP OPERATION

Place the headlamp switch in the headlamps on and then off positions. Do the headlamps operate correctly? Yes GO to A2 No REFER to: Headlamps (417-01 Exterior Lighting, Diagnosis and Testing).

A2 CHECK FOR VOLTAGE TO THE LIGHT SENSOR

Ignition OFF. Disconnect: Light Sensor C286 (vehicles equipped with DATC). Disconnect: Light Sensor C287 (vehicles equipped with EMTC). Ignition ON. 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). No GO to A3

A3 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.

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

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.

B1 CHECK FOR BCM (BODY CONTROL MODULE) DIAGNOSTIC TROUBLE CODE (DTCS)

Ignition ON. 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 No GO to B2

B2 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (NO DTC (DIAGNOSTIC TROUBLE CODE) )

Ignition OFF. Disconnect: Light Sensor C286 (vehicles equipped with DATC). Disconnect: Light Sensor C287 (vehicles equipped with EMTC). Ignition ON. 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). No GO to B10

B3 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (DTC (DIAGNOSTIC TROUBLE CODE) B1A85:11)

Ignition OFF. Disconnect: Light Sensor C286 (vehicles equipped with DATC). Disconnect: Light Sensor C287 (vehicles equipped with EMTC). Ignition ON. 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). No GO to B4

B4 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR A SHORT TO GROUND

Ignition OFF. Disconnect: BCM C2280G. 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? Yes GO to B10 No REPAIR the circuit.

B5 CHECK FOR VOLTAGE TO THE LIGHT SENSOR (DTC (DIAGNOSTIC TROUBLE CODE) B1A85:13)

Ignition OFF. Disconnect: Light Sensor C286 (vehicles equipped with DATC). Disconnect: Light Sensor C287 (vehicles equipped with EMTC). Ignition ON. 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 GO to B6 No GO to B8

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). No GO to B7

B7 CHECK THE LIGHT SENSOR GROUND CIRCUIT FOR AN OPEN

Ignition OFF. Disconnect: BCM C2280G. 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? Yes GO to B10 No REPAIR the circuit.

B8 CHECK THE LIGHT SENSOR INPUT CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF. Disconnect: BCM C2280G. 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? Yes GO to B10 No REPAIR the circuit.

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.