Component Testing

WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Perform the Circuit/System Testing first.
Ignition Off.
Connect the X175 harness connector.
Remove the fluid pan from the T12 Automatic Transmission Assembly.
Remove the control valve upper body.
Disconnect X177 harness connector, ignition On.
Test for 8.3-9.8 V between the 9 V reference 1 circuit terminal 3 and ground.
- If not between 8.3-9.8 V
  Replace the automatic transmission wiring harness, electrical connector passage sleeve.
- If between 8.3-9.8 V
Connect the red lead of the J-38522 generator to the signal circuit terminal 6 and connect the black lead of the J-38522 generator to ground.
Set the J-38522 generator to the specifications listed below:
- Signal switch to 5 V
- Frequency switch to 300 Hz
- Duty cycle switch to the 50% or the Normal position
Verify the scan tool transmission input speed parameter is between 210-240 RPM.
- If not between 210-240 RPM
  Replace the automatic transmission wiring harness, electrical connector passage sleeve.
- If between 210-240 RPM
Remove the B14D Transmission Intermediate Shaft Speed Sensor from the T12 Automatic Transmission Assembly.
Verify there is no damage or misalignment with the machine slots on the outside diameter of the reaction carrier/output internal ring gear assembly and the B14D Transmission Intermediate Shaft Speed Sensor.
- If damage or misalignment
  Repair or replace the necessary components.
- If no damage or misalignment
Replace the B14D Transmission Intermediate Shaft Speed Sensor.