Pinpoint Test E : B1A63:11, B1A63:15, B1A64:11, B1A64:15

E1 CHECK THE AUTOLAMP/SUNLOAD SENSOR REFERENCE VOLTAGE

Ignition OFF.

Disconnect: Autolamp/Sunload Sensor.

Ignition ON.

Press the AUTO button.

For DTC B1A63:11 or B1A63:15, measure:

Positive Lead	Measurement / Action	Negative Lead
C286-1	Courtesy of FORD MOTOR COMPANY	C286-4

For DTC B1A64:11 or B1A64:15, measure:

Positive Lead	Measurement / Action	Negative Lead
C286-3	Courtesy of FORD MOTOR COMPANY	C286-4

Is the voltage between 4.7 and 5.1 volts?

Yes	INSTALL a new autolamp/sunload sensor.
No	If DTC B1A63:15 and DTC B1A64:15 are both set, GO to E2. If diagnosing DTC B1A63:11 or DTC B1A64:11, GO to E5. If diagnosing DTC B1A63:15 or DTC B1A64:15, GO to E3.

E2 CHECK THE AUTOLAMP/SUNLOAD SENSOR GROUND CIRCUIT FOR AN OPEN

Ignition OFF.

Disconnect: HVAC Module C228B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C286-4	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	INSTALL a new autolamp/sunload sensor.
No	REPAIR the circuit.

E3 CHECK THE AUTOLAMP/SUNLOAD SENSOR FEEDBACK CIRCUITS FOR AN OPEN

For DTC B1A63:15, measure:

Positive Lead	Measurement / Action	Negative Lead
C228B-22	Courtesy of FORD MOTOR COMPANY	C286-1

For DTC B1A64:15, measure:

Positive Lead	Measurement / Action	Negative Lead
C228B-23	Courtesy of FORD MOTOR COMPANY	C286-3

Is the resistance less than 3 ohms?

Yes	GO to E4.
No	REPAIR the circuit.

E4 CHECK THE AUTOLAMP/SUNLOAD SENSOR FEEDBACK CIRCUITS FOR A SHORT TO VOLTAGE

For DTC B1A63:15, measure:

Positive Lead	Measurement / Action	Negative Lead
C286-1	Courtesy of FORD MOTOR COMPANY	Ground

For DTC B1A64:15, measure:

Positive Lead	Measurement / Action	Negative Lead
C286-3	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.
No	GO to E6.

E5 CHECK THE AUTOLAMP/SUNLOAD SENSOR FEEDBACK CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Disconnect: HVAC Module C228B.

For DTC B1A64:11, measure:

Positive Lead	Measurement / Action	Negative Lead
C286-3	Courtesy of FORD MOTOR COMPANY	Ground

For DTC B1A63:11, measure:

Positive Lead	Measurement / Action	Negative Lead
C286-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance greater than 10, 000 ohms?

Yes	GO to E6.
No	REPAIR the circuit.

E6 CHECK FOR CORRECT HVAC MODULE OPERATION

Ignition OFF.

Disconnect and inspect all HVAC module 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 HVAC module 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 TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new HVAC module. Refer to Heating Ventilation Air Conditioning (HVAC) Module .
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.