Workshop

HYDRA-MATIC 6L80 (6 Speed)

FILTER PLATE
ASSEMBLY
TRANSMISSION FLUID
TEMPERATURE SENSOR
LEAD
FRAME
SHIFT
SOLENOID 1
SHIFT
SOLENOID 2
LINE PRESSURE
CONTROL SOLENOID
TFP
SWITCH 4
TFP
SWITCH 1
TFP
SWITCH 3
CLUTCH PRESSURE
CONTROL SOLENOID 5
CLUTCH PRESSURE
CONTROL SOLENOID 2
CLUTCH PRESSURE
CONTROL SOLENOID 3
CLUTCH PRESSURE
CONTROL SOLENOID 4
16 PIN
CONNECTOR
TCC PRESSURE
CONTROL SOLENOID
TFP
SWITCH 5
CONTROL SOLENOID BODY AND TCM ASSEMBLY
Figure 7
ELECTRONIC COMPONENTS (CONT'D)
Control Solenoid Body And TCM Assembly Transmission Fluid Temperature (TFT) Sensor
The Control Solenoid Body and TCM Assembly
bolts directly to the lower and upper valve body
assemblies inside the transmission. The solenoid
assembly utilizes a lead frame system to connect the
components to the TCM, as shown in Figure 7. There
are no wires used for these components. The Control
Solenoid Body and TCM Assembly connect to the
external harness 16 way connector using a pass-thru
sleeve. All fluid passages to the switches and
solenoids are protected from debris by a serviceable
filter plate assembly, as shown in Figure 7. In
addition to the components shown in Figure 7, there
are two temperature sensors located inside the TCM
that are not shown, the TCM Temperature Sensor and
the Power Up Temperature Sensor.
The TFT sensor is part of the control solenoid body
and TCM assembly, and is not serviced seperately, as
shown in Figure 7 and 8. The TFT sensor is a
thermister, which changes value based on
temperature. The sensor has a negative temperature
coefficient, which means as the temp increases, the
resistance decreases, and as the temp decreases, the
resistance increases. The TCM supplies a voltage
reference signal to the sensor and measures the
voltage drop in the circuit. The TCM uses this
information to maintain shift quality and torque
converter clutch apply quality over the entire
operating temperature range. If the TCM detects an
improper signal from the TFT sensor, a DTC will be
activated.
The components shown in Figure 7 are diagnosed
seperately, but serviced as an assembly.
Continued on next Page
AUTOMATIC TRANSMISSION SERVICE GROUP
Technical Service Information
9
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