LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2016 >> Terrain SL, Gas >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 (Engine Controls And Fuel - 3.6L (LFX) - DTC P0351 To P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P129B or P129C: Fuel Pump Driver Control Module System >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF.
  2. Test for 12.4-12.8 V at the battery terminals and record the reading. The battery voltage should stabilize after a few minutes of turning the ignition OFF.
    • If between 12.4 V-12.8 V 
  3. Engine running, accessories OFF.
  4. Test for 13.4-15 V at the battery terminals and record the reading.
    • If between 13.4-15 V 
  5. Verify the engine control module scan tool Ignition 1 Signal voltage parameter is within 1 V of the battery voltage.
    • If not within 1 V of the battery voltage 

      Refer to Circuit/System Testing.

    • If within 1 V of the battery voltage 
  6. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  7. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  8. All OK.