Corsica L4-134 2.2L (1991)
Test A
TEST B:
1.
Connect a scan tool to the ALDL connector. Drive the vehicle, observe the speedometer and compare it to the vehicle speed shown on the scan
tool.
^
If both the speedometer and scan tool display the same speed, check for correct tire size, ECM CALPAK, and VSS drive gears. If OK, replace