LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2017 >> Transit Connect XL, Van Cargo >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Pinpoint Test A: No Start Through Pinpoint Test Dm: Manifold Pressure Sensors - (Except Diesel & Hybrid) >> Pinpoint Test DL: Cylinder Head Temperature (CHT) Sensor >> Introduction

Pinpoint Test DL: Cylinder Head Temperature (CHT) Sensor: Introduction

NOTE: On a typical vehicle, the CHT sensor is located in the cylinder head and the CHT2 sensor is located in the exhaust manifold.

This pinpoint test is intended to diagnose the following:

On applications that do not use an engine coolant temperature (ECT) sensor, the CHT sensor is used to determine the engine coolant temperature. To cover the entire temperature range of both the CHT and ECT sensors, the PCM has a dual switching resistor circuit on the CHT input. A graph showing the temperature switching from the COLD END line to the HOT END line, with increasing temperature and back with decreasing temperature is included. Note the temperature to voltage overlap zone. Within this zone it is possible to have either a COLD END or HOT END voltage at the same temperature. For example, at 90°C (194°F) the voltage could read either 0.60 volt or 3.71 volts. On applications with a CHT2 sensor, the PCM has a single resistor circuit on the CHT2 input. Refer to the table for the temperature to voltage expected values.

Voltage values calculated for VREF = 5 volts. These values can vary by 15% due to sensor and VREF variations.

Fig 1: Cylinder Head Temperature Sensor Voltage Graph
G11848414Courtesy of FORD MOTOR CO.

Cylinder Head Temperature (CHT) Sensor Expected Values 

Temperature CHT Sensor Values
°C °F Cold End (volts) Hot End (volts) Resistance (K ohms)
-40 -40 4.89 - 965.808
-30 -22 4.81 - 513.019
-20 -4 4.67 - 283.664
-10 14 4.45 - 162.584
0 32 4.14 - 96.255
10 50 3.73 - 59.175
20 68 3.26 - 37.387
30 86 2.74 - 24.215
40 104 2.23 - 16.043
50 122 1.76 - 10.85
60 140 1.36 - 7.487
70 158 1.04 - 5.268
80 176 0.79 3.99 3.775
85 185 0.69 3.86 3.215
90 194 0.60 3.71 2.75
95 203 0.53 3.56 2.361
100 212 0.46 3.41 2.034
110 230 - 3.07 1.523
120 248 - 2.74 1.155
130 266 - 2.41 0.8866
140 284 - 2.10 0.6891
150 302 - 1.81 0.5417
160 320 - 1.55 0.4301
170 338 - 1.33 0.3449
180 356 - 1.13 0.2791
190 374 - 0.96 0.2278
200 392 - 0.82 0.1875
210 410 - 0.70 0.155
220 428 - 0.60 0.130
230 446 - 0.51 0.109
240 464 - 0.44 0.092
250 482   0.35 0.07
260 500   0.33 0.067

Cylinder Head Temperature 2 (CHT2) Sensor Expected Values 

Temperature CHT2 Sensor Values
°C °F Volts Resistance (K ohms)
-40 -40 4.995 965.80
-30 -22 4.990 512.947
-20 -4 4.969 283.651
-10 14 4.949 162.58
0 32 4.917 96.248
10 50 4.870 59.173
20 68 4.839 37.387
30 86 4.802 24.216
40 104 4.707 16.043
50 122 4.578 10.851
60 140 4.411 7.487
70 158 4.202 5.269
80 176 3.953 3.775
90 194 3.667 2.750
100 212 3.354 2.038
110 230 3.018 1.523
120 248 2.680 1.155
130 266 2.350 0.8868
140 284 2.040 0.6893
150 302 1.757 0.5418
160 320 1.504 0.4301
170 338 1.282 0.3449
180 356 1.091 0.2791
190 374 0.928 0.2278
200 392 0.789 0.1875
210 410 0.672 0.1554
220 428 0.574 0.1297
230 446 0.491 0.1090
240 464 0.422 0.0921
250 482 0.363 0.0783
Fig 2: Cylinder Head Temperature (CHT) Sensor Connector
G11848415Courtesy of FORD MOTOR CO.
Vehicle Connector Pin Circuit
E-Series,
Escape/Kuga,
F-Series Super Duty 6.8L,
Fusion 2.5L,
Motorhome/Stripped Chassis/Step Van,
Mustang 3.7L		 A 2
1		 SIGRTN
CHT
All other vehicles B 2
1		 SIGRTN
CHT
Fig 3: Cylinder Head Temperature 2 (CHT2) Sensor Connector
G07431386Courtesy of FORD MOTOR CO.
Pin Circuit
2 SIGRTN (Signal Return)
1 CHT2 (Cylinder Head Temperature 2)

Powertrain Control Module (PCM) Connector 

For PCM connector views or REFERENCE VALUES .

Vehicle Connector Pin Circuit
Continental 2.0L,
Continental 2.7L,
Continental 3.0L,
Edge 2.0L,
Edge 2.7L,
Escape/Kuga 2.0L,
Explorer 2.3L,
F-150 2.7L,
Fusion 2.0L,
Fusion 2.7L,
MKC,
MKT 2.0L,
MKX 2.0L,
MKX 2.7L,
MKZ 3.0L,
Taurus 2.0L		 198 PIN E20
E36		 SIGRTN
CHT2
E-Series 6.2L 198 PIN E47
E51		 CHT
SIGRTN
Escape/Kuga 1.5L 198 PIN E14
E36		 SIGRTN
CHT2
Escape/Kuga 2.5L,
Fusion 2.5L		 198 PIN E39
E35		 CHT
SIGRTN
Expedition,
Explorer GTDI 3.5L,
Flex GTDI 3.5L,
MKT 3.5L,
Navigator,
Taurus GTDI 3.5L,
Transit 3.5L		 198 PIN E36
E20		 CHT
SIGRTN
F-150 GTDI 3.5L 198 PIN E36
E10		 CHT
SIGRTN
Fiesta, Focus 1.0L 198 PIN E10
E13		 SIGRTN
CHT2
Focus GDI 2.0L 154 PIN E56
E33		 CHT
SIGRTN
Focus GTDI 2.0L,
Focus 2.3L,
Fusion 1.5L,
MKZ 2.0L,
Mustang 2.3L		 198 PIN E20
E46		 SIGRTN
CHT2
Ford GT 198 PIN E36
E56		 CHT
SIGRTN
Transit Connect 198 PIN E39
B35		 CHT
SIGRTN
All other vehicles 198 PIN E47
E49		 CHT
SIGRTN
scientia non olet · About LEMON Manuals