Some 2021-2022 Equinox and Terrain models equipped with the 1.5L engine (RPO LYX) may have an intermittent no crank condition, but the vehicle powers up normally.
If the intermittent power up, no crank condition is found, verify the BCM Power Mode Data shows Crank, the ECM Electrical Data shows an active Crank Request and Crank Relay command. If the data is correct, check for power at the B+ terminal at the starter. If there is power present, inspect the B+ stud on the starter for oxidation. (Fig. 11)
Fig. 11
Replace the nut and clean the B+ stud terminals (Fig. 12) if oxidation is evident and then re-check starter function for proper operation. If the no crank condition is no longer present, repairs are complete. If not, continue with starter diagnosis following the appropriate Service Information.
Fig. 12
For additional information, refer to #PIT5887.
– Thanks to Kenneth Cole
great tip !