Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test
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Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test
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Special Tools
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EL 35616
GM-Approved Terminal Test Kit
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EL 38522
Variable Signal Generator
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For equivalent regional tools, refer to
Special Tools
.
The purpose of this test is to provide a simulated input/output speed sensor (ISS/OSS) signal to the control solenoid valve assembly ISS/OSS input circuits.
Transmission Input Speed Sensor
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1.
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Ignition OFF, disconnect the ISS wiring harness connector X3 (1) from the control solenoid valve assembly.
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2.
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Ignition ON, test for 8.3-9.3 volts at terminal A.
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4.
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Ignition OFF, using the
EL 35616
terminal test kit , connect the
EL38522
variable signal generator red lead to the ISS signal circuit terminal B on the TCM.
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5.
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Connect the black lead from the
EL 38522
variable signal generator to ground.
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6.
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Set the
EL 38522
variable signal generator to 5 volts, the frequency to 300 Hz, and the percent duty cycle to 50 or the normal position.
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7.
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Ignition ON, verify with a scan tool the Transmission ISS parameter is between 495-505 RPM.
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Transmission Output Speed Sensor
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1.
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Ignition OFF, disconnect the OSS wiring harness connector X4 (2) from the control solenoid valve assembly.
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2.
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Ignition ON, test for 8.3-9.3 volts at terminal A.
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4.
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Ignition OFF, using the
EL 35616
terminal test kit , connect the
EL 38522
variable signal generator red lead to the OSS signal circuit terminal B on the TCM.
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5.
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Connect the black lead from the
EL 38522
variable signal generator to ground.
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6.
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Set the
EL 38522
variable signal generator to 5 volts, the frequency to 300 Hz, and the percent duty cycle to 50 or the normal position.
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7.
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Ignition ON, verify with a scan tool the Transmission OSS parameter is between 256-266 RPM.
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