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.
WARNING:
Refer to Hot Exhaust System Warning .
Dynamic Test
- Ignition OFF, disconnect the harness connector at the B227 Gear Position Sensor.
- Connect the test leads of the J-38522-A vehicle signal generator as follows:
- Red test lead to the signal circuit 2 terminal 2 at the B227 Gear Position Sensor wire harness connector.
- Black test lead to ground at the transmission case.
- Double black power and ground lead wire to B+ and ground.
- Set and adjust the J-38522-A vehicle signal generator to the following switch positions:
- Signal switch to 5 V.
- Frequency switch to 600 Hz.
- Duty cycle switch to 10%.
- Ignition ON.
- Verify the scan tool Gate Select Position Sensor parameter duty cycle is 10% ± 2%.
- Set duty cycle switch to 20%, then 30% and so on through 90%.
- Verify the scan tool Gate Select Position Sensor parameter duty cycle matches the duty cycle for each switch position on the vehicle signal generator ± 2%.
- If the Gate Select Position Sensor parameter does not match vehicle signal generator duty cycle ± 2%
Replace the K20 Engine Control Module.
- If the Gate Select Position Sensor parameter matches the vehicle signal generator duty cycle
- If the Gate Select Position Sensor parameter does not match vehicle signal generator duty cycle ± 2%
- All OK.