Ford 2003 Mustang Workshop Manual page 2352

Is the voltage present?
B4 CHECK RESISTANCE OF TFT SENSOR
Disconnect: Transmission Harness .
Measure the resistance between the positive TFT
and negative TFT pins at transmission connector,
using the following:
Transmission Fluid Temperature
°C
-40 to -20 -40 to -4
-19 to -1 -3 - 31
0 - 20 32 - 68
21 - 40 69 - 104
41 - 70 105 - 158
71 - 90 159 - 194
91 - 110 195 - 230
111 - 130 231 - 266
131 - 150 267 - 302
Is the resistance correct?
PINPOINT TEST C: DIGITAL TRANSMISSION RANGE (TR) SENSOR
NOTE: Refer to the Digital Transmission Range (TR) Sensor Connector illustration preceding
these pinpoint tests.
NOTE: Refer to the Digital Transmission Range (TR) Sensor Diagnosis Chart preceding these
pinpoint tests.
°F Resistance (Ohms)
967K - 284K
284K - 100K
100K - 37K
37K - 16K
16K - 5K
5K - 2.7K
2.7K - 1.5K
1.5K - 0.8K
0.8K - 0.54K
Test Step
Yes
REFER to Diagnosis By Symptom
in this section to diagnose an
overheating concern.
No
INSTALL a new internal harness
(sensor is part of harness).
Result / Action to Take