Circuit/System Verification

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

Ignition/Vehicle & All vehicle systems - Off

NOTE:

The battery voltage should stabilize after a few minutes of turning the ignition/vehicle Off.

Test for 12.4 to 12.8 V between the test points:Battery Positive Post & Battery Negative Post
- If not between 12.4 and 12.8 V
  Refer to:Battery Inspection/Test
- Go to next step: If between 12.4 and 12.8 V
Inspect the electrical connectors and the ground circuits of the component for poor connections. - K20 Engine Control Module & T19 Power Supply Transformer
- If a condition exists
  Repair as necessary - Wiring / Terminal(s) / Electrical Connector(s)
- Go to next step: If no condition exists
Verify no communication DTCs are set.
- If a communication DTC is set
  Refer to:Diagnostic Trouble Code (DTC) List - Vehicle
- Go to next step: If a communication DTC is not set
Engine - Running - For greater than 15 s
Headlamp - ON
Test for 13.4 to 15 V between the test points:Battery Positive Post & Battery Negative Post
- If not between 13.4 and 15 V
  Refer to:Charging System Test
- Go to next step: If between 13.4 and 15 V
Verify the component activates: - Ignition On..
- A11 Radio
- P16 Instrument Cluster
- If the component does not activate
  Refer to: Circuit/System Testing
- Go to next step: If the component activates
Verify DTC P3051, P3053, P3055 is not set.
- If any of the DTCs are set
  Refer to: Circuit/System Testing
- Go to next step: If the DTC does not set
All OK.