Pinpoint Test W : B102E:11, B102E:15, B102E:92

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

Ambient air quality sensor (if equipped), 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 B102E:11	Air Quality Sensor: Circuit Short To Ground	This DTC sets when the HVAC control module senses lower than expected voltage on the sensor feedback circuit, indicating a short to ground.
HVAC B102E:15	Air Quality Sensor: Circuit Short To Battery Or Open	This DTC sets when the HVAC control module senses greater than expected voltage on the sensor feedback circuit, indicating a short to voltage or an open circuit or sensor.
HVAC B102E:92	Air Quality Sensor: Performance Or Incorrect Operation	This DTC sets when the HVAC control module senses erratic voltages from the evaporator temperature sensor.

Possible Sources

Wiring, terminals or connectors
Ambient air quality sensor
HVAC control module

NOTE: Use the correct probe adapter(s) when making measurements. Failure to. Use the correct probe adapter(s) may cause damage to the connector.

W1 CHECK THE AMBIENT AIR QUALITY SENSOR CIRCUITS FOR A SHORT TO VOLTAGE

Disconnect HVAC control module C294A

Disconnect in-vehicle temperature sensor C233.

Disconnect ambient air quality sensor C1744.

Disconnect BCM fuse 21 (5A).

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1744-1	Courtesy of FORD MOTOR COMPANY	Ground
Refer to C1744-2	Courtesy of FORD MOTOR COMPANY	Ground
Refer to C1744-3	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit in question.

GO to W2

W2 CHECK THE AMBIENT AIR QUALITY SENSOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1744-1	Courtesy of FORD MOTOR COMPANY	Ground
Refer to C1744-3	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes

GO to W3

No	REPAIR the circuit in question.

W3 CHECK THE AMBIENT AIR QUALITY SENSOR CIRCUITS FOR AN OPEN

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1744-1	Courtesy of FORD MOTOR COMPANY	BCM fuse 21 socket

Positive Lead	Measurement / Action	Negative Lead
Refer to C1744-2	Courtesy of FORD MOTOR COMPANY	Ground

Positive Lead	Measurement / Action	Negative Lead
Refer to C1744-3	Courtesy of FORD MOTOR COMPANY	Refer to C294A-15

Are the resistances less than 3 ohms?

Yes

GO to W4

No	REPAIR the circuit in question.

W4 CHECK THE AMBIENT AIR QUALITY SENSOR CIRCUITS FOR A SHORT TOGETHER

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C1744-1	Courtesy of FORD MOTOR COMPANY	Refer to C1744-2
Refer to C1744-1	Courtesy of FORD MOTOR COMPANY	Refer to C1744-3
Refer to C1744-2	Courtesy of FORD MOTOR COMPANY	Refer to C1744-3

Are the resistances greater than 10, 000 ohms?

Yes	INSTALL a new ambient air quality sensor. REFER to the appropriate procedure in REMOVAL AND INSTALLATION TEST the system for normal operation. If the concern is still present, GO to W5

No	REPAIR the circuits.

W5 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 Technical Service Bulletins (TSBs). If a TSB exists for this concern, DISCONTINUE this test and FOLLOW the 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.