Pinpoint Test G : U3003:16, U3003:17

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

G1 CARRY OUT THE HVAC CONTROL MODULE SELF-TEST

Start the engine.

Using a diagnostic scan tool, clear the HVAC control module DTCs.

Ignition OFF.

Wait 10 seconds.

Start the engine.

Using a diagnostic scan tool, perform the HVAC control module self-test.

Is DTC U3003:16 or U3003:17 still present?

Yes	GO to G2.
No	The system is operating normally at this time. The DTC may have been set previously during a low battery condition, battery charging or while jump starting the vehicle.

G2 CHECK FOR CHARGING SYSTEM DTCs IN THE PCM
- Ignition OFF.
- Ignition ON.
- Using a diagnostic scan tool, carry out the PCMKOEO self-test.
Are any charging system DTCs present in the PCM '

Yes DIAGNOSE the charging system. REFER to Charging System .

No GO to G3.

G3 CHECK BATTERY CONDITION

Ignition OFF.

Refer to Battery, Mounting and Cables and carry out the Battery -- Condition Test

Did the battery pass the condition test?

Yes	GO to G4.
No	INSTALL a new battery. REFER to Battery, Mounting and Cables .

G4 CHECK THE CHARGING SYSTEM VOLTAGE

NOTE: Do not allow the engine rpm to exceed 2, 000 rpm while performing this step or the generator may self-excite, resulting in default charging system output voltage. If engine rpm has exceeded 2, 000 rpm, shut the vehicle off and restart the engine before performing this step.

Start the engine.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY

For U3003:17, turn off all accessories and run the engine at 1, 500 rpm for a minimum of 2 minutes.

For U3003:16, turn on headlights, set the HVAC fan on high and run engine at 1, 500 rpm for a minimum of 2 minutes.

Is the battery voltage between 13-15.2 volts?

Yes	For U3003:16, GO to G5. For U3003:17, GO to G7.
No	DIAGNOSE the charging system. REFER to Charging System .

G5 CHECK THE HVAC CONTROL MODULE VOLTAGE SUPPLY CIRCUIT

Ignition OFF.

Disconnect: HVAC control module -- DATC C228A.

Disconnect: HVAC control module -- EMTC C2357A.

Ignition ON.

For DATC vehicles, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C228A-26	Courtesy of FORD MOTOR COMPANY	Ground

For EMTC vehicles, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C2357A-26	Courtesy of FORD MOTOR COMPANY	Ground

Is the voltage greater than 11 volts?

Yes	GO to G6.
No	REPAIR the circuit.

G6 CHECK THE HVAC CONTROL MODULE GROUND CIRCUIT FOR HIGH RESISTANCE

Ignition OFF.

For DATC vehicles, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C228A-10	Courtesy of FORD MOTOR COMPANY	Ground

For EMTC vehicles, measure:

Positive Lead	Measurement / Action	Negative Lead
Refer to C2357A-10	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 3 ohms?

Yes	GO to G7.
No	REPAIR the circuit.

G7 CHECK FOR CORRECT HVAC CONTROL MODULE OPERATION

Ignition OFF.

Disconnect and inspect all HVAC control 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 control 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 control module. REFER to Climate Control .
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.

Yes	DIAGNOSE the charging system. REFER to Charging System .
No	GO to G3.