Circuit/System Verification: Notes
WARNING: This page is about a different car, the 2016 Chevrolet Malibu Limited. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
- Most vehicle systems will go to sleep within 30 min but it can take up to 2 h before all systems power down allowing the parasitic draw test to pass. An occasional increase in the parasitic draw is normal as long as it returns within 1 s.
- A faulty C1B Battery can drain the C1 Battery. Always disconnect and test both independent of the other.
- Closing the door latches/ajar switch while leaving the doors open is recommended, this allows the vehicle systems to perform in a "doors closed" mode while allowing vehicle interior access that may be needed to complete the diagnostic steps.
- Locking doors will arm the vehicle content theft deterrent system if equipped. Failure to arm the system may cause a theft system fault to not be present during testing.
- There are many things that can prevent the vehicle from completely going to sleep and passing the parasitic draw test. Make sure all the conditions listed below are met before performing the parasitic current draw test.
- Ignition OFF
- Key out of the ignition switch - when not equipped with keyless access and start
- Retained Accessory Power OFF - open and close the driver door after ignition OFF
- Scan tool not communicating with a vehicle control module - in some cases it may need to be disconnected from the DLC
- All access doors closed
- Headlamps OFF - auto headlamps disabled
- Any delay lighting OFF
- If equipped with an under hood lamp disable it
- HVAC after blow OFF
- Any accessory that can work with ignition OFF inactive or OFF
- Wait up to 2 min or longer, after all other listed conditions are met
Using an Inductive Pickup Probe
- Connect an inductive pickup probe to the negative C1 Battery cable that can read down to 1 mA.
- Ignition OFF, as the vehicle systems shut down test for less than 30 mA of parasitic current drain.
- If greater than 30 mA.
- Disconnect the C1B Battery.
- Test for more than 30 mA of parasitic current drain at C1 Battery.
- If 30 mA or greater, refer to Circuit/System Testing for C1 Battery.
- If less than 30 mA.
- refer to Circuit/System Testing for C1B Battery.