Circuit/System Verification
WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON, observe the DTC information with a scan tool. Verify that DTC P0602 does not fail this ignition cycle.
- If DTC P0602 failed this ignition, reprogram the TCM. Refer to Control Module References . If DTC P0602 resets, replace the TCM.
- Observe the DTC information with a scan tool. Verify that DTCs P0601, P0603, and P0604 do not set this ignition cycle.
- If any of the DTCs P0601, P0603, or P0604 are set this ignition cycle replace the TCM, refer to Transmission Control Module Removal procedure and Transmission Control Module Installation procedure.