Pinpoint Test N: B1A63:11, B1A63:15, B1A64:11, B1A64:15
WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.
- Refer to Wiring Diagrams AUTOMATIC CLIMATE CONTROL SYSTEM
for schematic and connector information.
Normal Operation and Fault Conditions
The sunload sensor supplies information to the HVAC control module indicating the sunload intensity on the vehicle and the HVAC control module adjusts the system based on that information.
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition HVAC B1A63:11 Right Solar Sensor: Circuit Short To Ground Module senses a short to ground from the right sunload sensor feedback circuit. HVAC B1A63:15 Right Solar Sensor: Circuit Short To Battery Or Open Module senses an open or a short to voltage from the right sunload sensor feedback circuit. HVAC B1A64:11 Left Solar Sensor: Circuit Short To Ground Module senses a short to ground from the left sunload sensor feedback circuit. HVAC B1A64:15 Left Solar Sensor: Circuit Short To Battery Or Open Module senses an open or a short to voltage from the left sunload sensor feedback circuit. Possible Sources
- Wiring, terminals or connectors
- Autolamp and sunload sensor
- HVAC control module
- NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- N1 CHECK THE SUNLOAD SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect Sunload sensor C286.
- Ignition ON.
- Measure:
C286
Positive Lead Measurement / Action Negative Lead C286-1 Ground C286-2 Ground C286-3 Ground C286-4 Ground
Is any voltage present?
Yes REPAIR the circuit. No GO to N2 - N2 CHECK THE SUNLOAD SENSOR CIRCUITS FOR A SHORT TO GROUND
- Ignition OFF.
- Measure:
C286
Positive Lead Measurement / Action Negative Lead C286-1 Ground C286-2 Ground C286-3 Ground C286-4 Ground
Are the resistances greater than 10, 000 ohms?
Yes GO to N3 No REPAIR the circuit. - N3 CHECK THE SUNLOAD SENSOR SIGNAL CIRCUITS FOR AN OPEN
- Disconnect BCM C2280B.
- Disconnect HVAC control module C228A and C228B.
- Measure:
C286 to C228B HVAC
Positive Lead Measurement / Action Negative Lead C286-1 C228B-22 C286-3 C228B-21 C286 to C2280B BCM
Positive Lead Measurement / Action Negative Lead C286-2 C2280B-24 C286-4 C2280B-22
Are the resistances less than 3 ohms?
Yes GO to N4 No REPAIR the circuit. - N4 CHECK THE SUNLOAD SENSOR SIGNAL CIRCUITS FOR A SHORT TO EACH OTHER
- Measure:
Positive Lead Measurement / Action Negative Lead C286-1 C286-2 C286-1 C286-3 C286-1 C286-4 C286-2 C286-3 C286-2 C286-4 C286-3 C286-4
Are the resistances greater than 10, 000 ohms?
Yes INSTALL a new sunload sensor. REFER to: Sunload Sensor . TEST the system for normal operation. If the concern is still present, GO to N5 No REPAIR the circuit. - Measure:
- N5 CHECK FOR CORRECT HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE OPERATION
- Ignition OFF.
- Disconnect and inspect all HVAC control module electrical connectors (if not previously disconnected).
- Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary
- Connect all HVAC control module electrical 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 HVAC control module. REFER to: Heating, Ventilation and Air Conditioning (HVAC) Control Module . No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.