Pinpoint Test Ad : C1B14:11, C1B14:12

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

A 5-volt reference voltage and ground is supplied to the climate control sensors and actuators from the HVAC control module.

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
HVAC C1B14:11	Sensor Supply Voltage A: Circuit Short To Ground	This DTC sets when the module senses less than 5 volts on the sensor reference voltage circuit, indicating a short to ground.
HVAC C1B14:12	Sensor Supply Voltage A: Circuit Short To Battery	This DTC sets when the module senses greater than 5 volts on the sensor reference voltage circuit, indicating a short to voltage.

Possible Sources

Wiring, terminals or connectors
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.

AD1 CHECK THE HVAC (HEATING, VENTILATION AND AIR CONDITIONING) CONTROL MODULE SELF-TEST
- Ignition ON.
- Using a diagnostic scan tool, perform HVAC control module self-test.
Is DTC C1B14:11 present?

Yes GO to AD2

No GO to AD5

AD2 CHECK THE REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.

Disconnect HVAC control module C294A.

Measure:

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

Is the resistance greater than 10, 000 ohms?

Yes

GO to AD3

No	REPAIR the circuit.

AD3 CHECK THE REFERENCE VOLTAGE CIRCUIT AND THE SIGNAL RETURN CIRCUIT FOR A SHORT TOGETHER

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C294A-3	Courtesy of FORD MOTOR COMPANY	Refer to C294A-2

Is the resistance greater than 200 ohms?

Yes

GO to AD6

GO to AD4

AD4 CHECK THE A/C (AIR CONDITIONING) COMPONENTS

Measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C294A-3	Courtesy of FORD MOTOR COMPANY	Refer to C294A-2

While measuring the resistance, disconnect the following components one at a time, in order. Stop disconnecting components if the measured resistance rises above 200 ohms.
- (If equipped with air inlet door actuator with 5 circuits), Air inlet door actuator C289
- Air distribution door actuator C236
- Temperature door actuator C2093

Did the resistance rise above 200 ohms?

Yes	INSTALL a new actuator (the last one to be disconnected). Refer to REMOVAL AND INSTALLATION for the procedure. When installing an actuator, CONNECT the actuator electrical connector before the HVAC control module. This allows the actuator to be calibrated when the HVAC control module is connected.

No	REPAIR the circuit.

AD5 CHECK THE REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect HVAC control module C228A.

Measure:

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

Is any voltage present?

Yes	REPAIR the circuit.

GO to AD6

AD6 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.