Circuit/System Verification
- Ignition ON.
- Verify DTC U0077 is not set.
- If DTC U0077 is set
Refer to Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device .
- If DTC U0077 is not set
- If DTC U0077 is set
- All OK
Refer to Scan Tool Does Not Communicate with Chassis High Speed GMLAN Device .