Stop/Start System Is Inoperable After A System Repair And No DIC Message Or DTC Is Set (PI1520D)

Publication date: 2017-05-01
Reference number: PI1520D
Supersedes refnos: PI1520A, PI1520B, PI1520C

STOP/START SYSTEM IS INOPERABLE AFTER A SYSTEM REPAIR AND NO DIC MESSAGE OR DTC IS SET

TECHNICAL SERVICE BULLETIN

Reference Number(s): PI1520D, Date of Issue: May 1, 2017

Affected Model(s):	2016 Buick Encore, Envision 2016 Cadillac ATS, CT6, CTS 2016 Chevrolet Cruze (VIN B), Malibu (VIN Z) Equipped with Stop/Start System (RPO KL9)
Attention:	This PI also applies to any of the above models that may be Export from North America vehicles.
Supercedes:	This PI has been revised to remove the 2017 models. Please discard PI1520C.

CONDITION/CONCERN

Some technicians may notice that the Stop/Start System is inoperable after a stop/start system repair or after any repair where the 12V battery negative cable has been disconnected. No DIC message or DTC will be set.

RECOMMENDATION/INSTRUCTIONS

The learn procedure needs to be completed on the Battery Sensor Module. It will be necessary to park the vehicle for 3 hours after the vehicle's system sleep cycle and without being driven to allow the learn procedure to be completed on the Battery Sensor Module.

Battery Sensor Module Battery State Information can be found in ECM/Data Display/Stop/Start System Data. If the parameter reads "Available" then the learn has been completed. If the parameter reads "Not Available," then the learn is required to enable stop/start operation.

NOTE:

Once the learn has been completed, it is necessary to crank the engine to update the data display to change from Not Available to Available.

If the repair is a non-Stop/Start repair and the vehicle is being returned to the customer, advise the customer that the vehicle will not Stop/Start until the vehicle has sat for 3 hours undisturbed after the system sleep cycle.