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ELECTRICAL COMPONENT DIAGNOSIS
Solenoid Assembly
The Solenoid Assembly is bolted to the case and
located inside the bottom pan. The Solenoid
Assembly contains shift solenoid 1, shift solenoid 2,
coast clutch solenoid, TCC solenoid, EPC solenoid
and the TFT sensor. The solenoids are not serviced
individually. You must replace the entire assembly, as
shown in Figure 14. Some of these units are equipped
with an ON/OFF TCC solenoid and some are
equipped with a PWM TCC solenoid, so it is
important to determine which you have.
SOLENOID PACK ASSEMBLY
Transmission Fluid Temperature
°C
°F
-40 to -20
-40 to -4
-19 to -1
-3 to 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
12
Technical Service Information
Copyright © 2003 ATSG
Figure 14
Resistance
1062k - 284k W
284k - 100k W
100k - 37k W
37k - 16k W
16k - 5k W
5k - 2.7k W
2.7k - 1.5k W
1.5k - 0.8k W
0.8k - 0.54k W
Figure 15
AUTOMATIC TRANSMISSION SERVICE GROUP
SOLENOID PACK TESTING PROCEDURE
In Figure 16 we have provided you with pin number
identification for both the transmission case
connector and the vehicle harness. We have also
provided a chart that will give you the function of
each and the ohms readings you should see on each of
the solenoids and the TFT sensor.
Note: All testing that we have provided for you is
done with a DVOM, set to the ohms position, and all
tests are performed with the ignition switch in the
"OFF" position.
(1) Shift Solenoid 1 is tested across pins 1 and 3,
and should read 20-30 ohms resistance. Refer
to Figure 16.
(2)
Shift Solenoid 2 is tested across pins 1 and 2,
and should read 20-30 ohms resistance. Refer
to Figure 16.
(3)
TCC On/Off Solenoid is tested across pins 1 and
4, and should read 20-30 ohms resistance.
Refer to Figure 16.
(4)
TCC PWM Solenoid is tested across pins 1 and
4, and should read 10-20 ohms resistance.
Refer to Figure 16.
(5)
Coast Clutch Solenoid is tested across pins 1
and 5, and should read 20-30 ohms resistance.
Refer to Figure 16.
(6)
EPC Solenoid is tested across pins 11 and 12,
and should read 3.0-5.0 ohms resistance. Refer
to Figure 16.
(7)
TFT sensor is tested across pins 7 and 8. Refer
to the chart provided in Figure 15.
4R100 FLUID REQUIREMENTS
Only Motorcraft Mercon® multi-purpose automatic
transmission fluid XT-2-QDX or an equivalent
Mercon® fluid should be used in all Ford 4R100
transmissions. Before adding any fluid, ensure that it
is the correct type.
Checking Fluid
Always use the transmission fluid level indicator
(Dipstick) to set the correct fluid level. Set the fluid
level at normal operating temperature which is 150°
to 170°F, engine at idle in Park.
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