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Home >> GMC >> 2016 >> Canyon SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 51 (Data Communication System) >> Diagnostic Information and Procedures >> DTC U1340-U135F: Control Module U Code List >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2017 GMC Canyon and 2017 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Determine the LIN device that is not communicating. Refer to Control Module U Code List .
  2. Ignition ON/Vehicle In Service Mode.
  3. Verify that DTC B1325, B1330, B1370, B1380, B1424, B1440, B1441, B1517, C0800, C0899, C12E1, P0560, P0562, U0028, U0029, U0100-U02FF, or U2098 is not set.
    • If none of the DTCs are set 
  4. Refer to Circuit/System Testing.