PINPOINT TEST KP: Charge Air Cooler (CAC): Introduction: Notes

WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2014 Lincoln Navigator, 2014 Lincoln MKZ, 2014 Lincoln MKX, 2014 Lincoln MKT, and 2014 Lincoln MKS. However, it is still accessible from the selected car via links, so may be relevant.

This pinpoint test is intended to diagnose the following:

CAC coolant temperature sensor (12A648)
CAC pump relay (14B192)
CAC pump (8501)
harness circuits: CAC, CACCTS, SIGRTN, PUMPPWR and GND
powertrain control module (PCM) (12A650)

Fig 1: Charge Air Cooler Temperature Versus Voltage Graph
Courtesy of FORD MOTOR CO.

TEMPERATURE SENSOR VOLTAGE AND RESISTANCE SPECIFICATIONS

Temperature		Temperature Sensor Values
°C	°F	Voltage	Resistance (K ohms)
120	248	0.28	1.18
110	230	0.36	1.55
100	212	0.47	2.07
90	194	0.61	2.80
80	176	0.80	3.84
70	158	1.05	5.37
60	140	1.37	7.70
50	122	1.77	10.97
40	104	2.23	16.15
30	86	2.74	24.27
20	68	3.26	37.30
10	50	3.73	58.75
0	32	4.14	95.85
-10	14	4.45	160.31

Fig 2: Identifying Charge Air Cooler Pump Connector Terminals

Courtesy of FORD MOTOR CO.

Vehicle	Connector	Pin	Circuit
Fusion	A	1 2 3	CAC GND PUMPPWR
Mustang	B	1 4	GND PUMPPWR

Fig 3: Identifying Charge Air Cooler Coolant Temperature Sensor Connector Terminals

Courtesy of FORD MOTOR CO.

Pin	Circuit
2	SIGRTN (Signal Return)
1	CACCTS (Charge Air Cooler Coolant Temperature Signal)

Fig 4: Identifying Charge Air Cooler Relay Connector Terminals

Courtesy of FORD MOTOR CO.

Pin	Circuit
5	PUMPPWR (Pump Power)
3	B+ (Battery Positive Voltage)
2	CAC (Charge Air Cooler)
1	VPWR (Vehicle Power)