Control Solenoid Valve and Transmission Control Module Assembly
Solenoid Performance Test
Table 1: Control Solenoid Valve
Assembly Solenoid Performance Test Plate to Component
Identification
Special Tools
DT-48616 Solenoid Assembly Test Kit & Adapter
Harness
For equivalent regional tools, refer to
Special Tools .
The purpose of this procedure is to test the functionality of
the control solenoid valve assembly solenoids for a gross stuck
open or stuck closed condition. DT-48616 test plate
is bolted to the control solenoid valve assembly on the valve body
mounting surface. Pressurized air is passed into the aluminum test
block, through the control solenoid valve assembly solenoid passage
and back to a pressure gauge on the test block. The pressure gauge
indicates open if air pressure is passed through the solenoid, or
closed if the solenoid is unable to pass air through. A scan tool
is used to command the solenoids ON and OFF. While watching the
pressure gauge, one can determine the valve functionality. The
recommended shop air pressure for this test is 90-100 psi.
| 1. |
Remove the control solenoid
valve assembly and filter plate from the transmission. |
|
Note: Drain the TCM
of excess transmission fluid before attaching to test block and use
caution when attaching air to test block air inlet.
|
| 2. |
Bolt the DT-48616-1
test plate to the filter plate, and control solenoid valve
assembly. Use the bolts and washers supplied with the tool to
attach the test block. Tighten the bolts to 5 N·m
(44 lb in) using a center out alternating torque
sequence. |
| 3. |
Install the pressure gauge to
the affected solenoid air port. Reference component to air port
table. |
|
Note: If air pressure
greater than 345 kpa (50 psi) is applied, an accurate test of the
shift solenoid cannot be performed.
|
| 4. |
Regulate the workshop air
pressure to 310-345 kpa (45-50 psi) and connect the line to the
DT-48616-1 test plate air inlet port. |
| 5. |
Connect the
DT-48616-10 harness to the vehicle harness and the
control solenoid valve assembly. |
|
Note: The TCM limits
the time the solenoids are commanded on to prevent overheating of
the solenoids. Once the time limit is reached, the TCM prevents the
test from being continued for 5 minutes. The ignition must remain
ON during the 5 minute countdown period.
|
| 6. |
Ignition ON, use a scan tool
to command the solenoid in question ON and OFF. Watch the air
pressure gauge and look for the change in pressure as you command
the valve ON and OFF. The valve should change the flow through the
valve port with a result of a change in the pressure reading on the
gauge. If the valve is stuck closed, no pressure change will occur.
Command the solenoid valve ON and OFF several times to determine
the state of the solenoid valve in question. Release the air
pressure in the gauge between pressurization tests. |
Control Solenoid Valve Assembly Solenoid Performance Test Plate
to Component Identification
Component
|
Port On Test Plate
|
Commanded State
|
ON
|
OFF
|
PC Solenoid 2, 35R
|
GEN 1 - F
GEN 2 - C
|
Full pressure to gauge
|
No pressure to gauge
|
PC Solenoid 3, R1/456
|
G
|
Full pressure to gauge
|
No pressure to gauge
|
PC Solenoid 4, 2-6
|
B
|
Full pressure to gauge
|
No pressure to gauge
|
PC Solenoid 5, 1234
|
GEN 1 - C
GEN 2 - F
|
Full pressure to gauge
|
No pressure to gauge
|
Shift Solenoid
|
D
|
Full pressure to gauge
|
Below full pressure to gauge
|
Line Pressure Control Solenoid
|
A
|
Command to highest setting, full pressure to gauge
|
Command to lowest setting, below full pressure to gauge
|
TCC PC Solenoid
|
E
|
Full pressure to gauge
|
No pressure to gauge
|
Note: With the key on
engine off (KOEO), the TCM will normally cycle some of the
transmission solenoids On and Off to facilitate keeping the ports
and solenoids clean and free of debris. This dither function is a
normal activity and will cause the valves to cycle open and closed
quickly when the TCM is powered up. This can cause the psi gauge to
flicker high and low as the valves open and close. This may cause
some air to exit the ports where the psi gauge is not connected as
those solenoids cycle on and off.
|
|
| |
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