If vehicle battery was disconnected or Powertrain Control Module (PCM) was replaced, driving the vehicle will enable the PCM to perform a computer relearn procedure for obtaining proper drivability and engine idle. Until PCM has completed computer relearn procedure, drivability or idle may differ from standard vehicle operation. On A/T models, transaxle shift qualities must be relearned. And for more GM vehicles projects,check here:GM vehicle repair cases
Procedures
1On all models, start engine and warm engine to normal operating temperature. Perform 10 sets of upshifts (1-2, 2-3 and 3-4) at about 30 percent throttle.
2On DOHC engine, while coasting at 35 MPH, slowly accelerate to 1/2 throttle to achieve a 4-3 downshift. Place gearshift in “D3” while coasting at 20 MPH, slowly accelerate at 3/4 throttle to achieve a 3-2 downshift.
3Repeat step 2) five times. Vehicle drivability computer relearn procedure is now complete.
4On SOHC engine, while coasting at 40 MPH, slowly accelerate to 1/2 throttle to achieve a 4-3 downshift. Place gearshift in “D3” while coasting at 30 MPH, slowly accelerate at 1/2 throttle to achieve a 3-2 downshift.
5Repeat step 4) five times. Vehicle drivability computer relearn procedure is now complete.
This instruction show you guide on how to solve Caterpillar C9 engine injection actuation pressure…
Here is the instruction show you guide on how to remove HV battery cooling fan…
Here is the instruction show you guide on how to solve Scania truck alarm system…
This instruction show you guide on how to repair Doosan stage V engine U02A2 timeout…
Here is the instruction show you guide on how to repair Doosan stage v egnine…
This instruction show you guide on how to use JPRO Diagnostic software to performance check…