Pinpoint Test P : B1A63:11, B1A63:15, B1A64:11, B1A64:15
WARNING: This page is about a different car, the 2018 Ford EcoSport. However, it is still accessible from the selected car via links, so may be relevant.
- Automatic Climate Control System for schematic and connector information.
Normal Operation and Fault Conditions
Sunload sensor, REFER to: Climate Control System - Vehicles With: Electronic Automatic Temperature Control (EATC) - System Operation and Component Description .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition HVAC B1A63:11 Right Solar Sensor: Circuit Short To Ground This DTC sets when the HVAC module senses lower than expected voltage on the RH sensor feedback circuit, indicating a short to ground. HVAC B1A63:15 Right Solar Sensor: Circuit Short To Battery Or Open This DTC sets when the HVAC module senses greater than expected voltage on the RH sensor feedback circuit, indicating a short to voltage or an open circuit or sensor. HVAC B1A64:11 Left Solar Sensor: Circuit Short To Ground This DTC sets when the HVAC module senses lower than expected voltage on the LH sensor feedback circuit, indicating a short to ground. HVAC B1A64:15 Left Solar Sensor: Circuit Short To Battery Or Open This DTC sets when the HVAC module senses greater than expected voltage on the LH sensor feedback circuit, indicating a short to voltage or an open circuit or sensor. Possible Sources
- Wiring, terminals or connectors
- Sunload sensor
- HVAC control module
Visual Inspection and Pre-checks
- Inspect loose or corroded HVAC module and sunload sensor connections.
- NOTE: Use the correct probe adapter(s) when making measurements. Failure to. Use the correct probe adapter(s) may damage the connector.
- P1 CHECK THE SUNLOAD SENSOR CIRCUITS FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect HVAC control module C294A.
- Disconnect HVAC control module C294B.
- Disconnect Sunload sensor C286.
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead Refer to C286-1 Ground Refer to C286-2 Ground Refer to C286-3 Ground Refer to C286-4 Ground Refer to C286-5 Ground
Is any voltage present?
Yes REPAIR the affected circuits. No GO to P2 - P2 CHECK THE SUNLOAD SENSOR CIRCUITS FOR A SHORT TO GROUND
- Ignition OFF.
- Measure:
Positive Lead Measurement / Action Negative Lead Refer to C286-1 Ground Refer to C286-2 Ground Refer to C286-3 Ground Refer to C286-4 Ground Refer to C286-5 Ground
Are the resistances greater than 10, 000 ohms?
Yes GO to P3 No REPAIR the affected circuits. - P3 CHECK THE SUNLOAD SENSOR CIRCUITS FOR AN OPEN
- Disconnect BCM C2280D.
- Measure:
Without RHD base
Positive Lead Measurement / Action Negative Lead Refer to C286-1 Refer to C294B-21 Refer to C286-2 Refer to C294B-22 RHD base
Positive Lead Measurement / Action Negative Lead Refer to C286-1 Refer to C294B-17 Refer to C286-2 Refer to C294B-18 Positive Lead Measurement / Action Negative Lead Refer to C286-3 Refer to C294A-2 Positive Lead Measurement / Action Negative Lead Refer to C286-4 Refer to C2280D-52 Refer to C286-5 Refer to C2280D-39
Are the resistances less than 3 ohms?
Yes GO to P4 No REPAIR the affected circuits. - P4 CHECK THE SUNLOAD SENSOR CIRCUITS FOR A SHORT TOGETHER
- Measure:
Positive Lead Measurement / Action Negative Lead Refer to C286-1 Refer to C286-2 Refer to C286-1 Refer to C286-3 Refer to C286-1 Refer to C286-4 Refer to C286-1 Refer to C286-5 Refer to C286-2 Refer to C286-3 Refer to C286-2 Refer to C286-4 Refer to C286-2 Refer to C286-5 Refer to C286-3 Refer to C286-4 Refer to C286-3 Refer to C286-5 Refer to C286-4 Refer to C286-5
Are the resistances greater than 10, 000 ohms?
Yes GO to P5 No REPAIR the circuits. - Measure:
- P5 CHECK FOR CORRECT SUNLOAD SENSOR OPERATION
- Ignition OFF.
- Inspect the disconnected 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 all disconnected 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 INSTALL a new sunload sensor. REFER to: Sunload Sensor . TEST the system for normal operation. If the concern is still present, GO to P6 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. - P6 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.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK On-Line Automotive Service Information System (OASIS) for any applicable Technical Service Bulletins (TSBs). If a Technical Service Bulletin (TSB) exists for this concern, DISCONTINUE this test and FOLLOW Technical Service Bulletin (TSB) instructions. If no Technical Service Bulletins (TSBs) 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.