Pinpoint Test D: C0093:16, C0093:17 And C0093:92

D1 CHECK FOR PTU TEMPERATURE SENSOR INPUT VOLTAGE

Ignition OFF.

Disconnect PTU Oil Temperature Sensor C3841B.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3841B-1	Courtesy of FORD MOTOR COMPANY	Ground

Is voltage between 4.95 and 5.1 volts?

Yes	Voltage is present at the sensor. GO to D5

GO to D2

D2 CHECK TEMPERATURE SENSOR INPUT CIRCUIT FOR OPEN

Ignition OFF.

Disconnect AWD module C281.

Inspect connector for damage.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3841B-1	Courtesy of FORD MOTOR COMPANY	C281-34

Is the resistance less than 3 ohms?

Yes	The circuit is intact. GO to D3

No	The circuit has high resistance or is open. REPAIR Circuit.

D3 CHECK TEMPERATURE SENSOR INPUT CIRCUIT FOR SHORT TO GROUND.

Ignition OFF.

Disconnect PTU Oil Temperature Sensor C3841B.

Disconnect AWD Module C281.

measure:

Positive Lead	Measurement / Action	Negative Lead
C3841B-1	Courtesy of FORD MOTOR COMPANY	Ground

Is the resistance less than 10, 000 ohms?

Yes	The circuit is shorted to ground. REPAIR circuit.

No	The circuit is not shorted to ground. GO to D4

D4 CHECK TEMPERATURE SENSOR INPUT CIRCUIT FOR SHORT TO BATTERY

Ignition OFF.

Disconnect PTU Oil Temperature Sensor C3841B.

Disconnect AWD Module C281.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3841B-1	Courtesy of FORD MOTOR COMPANY	Ground

Ignition ON.

Is any voltage present?

Yes	The circuit is shorted to voltage. REPAIR circuit.

No	The circuit is intact and not shorted. Diagnose PCM. Refer to PCM Guided Routine Testing

D5 CHECK FOR PTU TEMPERATURE SENSOR SIGNAL RETURN

Ignition OFF.

Disconnect PTU Oil Temperature Sensor C3841B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C3841B-1	Courtesy of FORD MOTOR COMPANY	C3841B-2

Ignition ON.

Is the voltage between 4.95 and 5.1V?

Yes	The circuit is intact. GO to D6

No	Repair the circuit.

D6 CHECK FOR PTU TEMPERATURE SENSOR RESISTANCE

Disconnect PTU Oil Temperature Sensor C3841B.

Measure:

Positive Lead	Measurement / Action	Negative Lead
Courtesy of FORD MOTOR COMPANY C3841B-1	Courtesy of FORD MOTOR COMPANY	Courtesy of FORD MOTOR COMPANY C3841B-2

Temperature C	Temperature F	MIN Ohms	NOR Ohms	MAX Ohms
-40	-40	2.96M	3.466M	3.9974M
-30	-22	1.565M	1.817657M	2.082M
-20	-4	861.54K	0.993M	1.130M
-10	14	492.02K	563.3K	637.9K
0	32	290.59K	330.5K	372.4K
10	50	176.98K	200.1K	224.4K
20	68	110.88K	124.7K	139.2K
25	77	88.626K	99.459K	110.7K
30	86	71.296K	79.805K	88.69K
40	104	46.954K	52.314K	57.93K
50	122	31.615K	35.071K	38.674K
60	140	21.728K	24.005K	26.378K
70	158	15.219K	16.750K	18.344K
80	176	10.850K	11.899K	12.989K
90	194	7864	8594	9353
100	210	5787	6304	6841
110	230	4319	469	5078
120	248	3268	3539	3820
130	266	2503	2703	2911
140	284	1940	2089	2244
150	302	1520	1633	1751
160	360	1204	1290	1380

Does the temperature to resistance specifications match?

Yes	No Fault found. GO to D7

No	INSTALL a new transfer case fluid (PTU) temperature sensor.

D7 CHECK OPERATION
- Ignition OFF.
- Check other modules for voltage DTCs. If so, go to charging system tests.
- Montior B+ and Ground while wiggle testing harness. If no concern, replace the module.
- Disconnect and inspect AWD Module C281.
- Disconnect PTU Oil Temperature Sensor C3841B.
- CLEAR AWD Module DTCs.
- PERFORM KOER Self test on the AWD Module
Did the temperature sensor DTC reset?

Yes Diagnose PCM. Refer to PCM Guided Routine Testing

No The PTU temperature sensor is working correctly at this time.