Circuit/System Verification
- Ignition ON.
- Verify that DTC U0293 is not set.
- If DTC U0293 is set
Refer to DTC U0100-U02FF (without HP6) , DTC U0100-U02FF (with HP6) .
- If DTC U0293 is not set
- If DTC U0293 is set
- Verify that DTC U0074, U1814, B1428, B1370, B1380, B1440, B1441, B1325, or P0562 is not set.
- If any of the DTCs are set
Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- If none of the DTCs are set
- If any of the DTCs are set
- Verify that DTCs U1818, U182A, U1844, and U1847 are not set.
- If all of those DTCs are set together
Refer to DTC U0074 (Chassis Expansion Bus) , DTC U0074 (Powertrain Expansion Bus with HP6) , DTC U0074 (Mid Speed GMLAN) , DTC U0074 (Powertrain Expansion Bus without HP6) .
- If all of those DTCs are not set together
- If all of those DTCs are set together
- Refer to Circuit/System Testing .