Chevrolet Sonic Repair Manual: Electrical Power Management Description and Operation
- Electrical Power Management
-
The electrical power management is used to monitor and control the charging system and alert the driver of possible problems within the charging system. The electrical power management system makes the most efficient use of the generator output, improves the battery state-of-charge, extends battery life, and manages system electrical loads.
The load shed operation is a means of reducing electrical loads during a low voltage or low battery state-of-charge condition.
The idle boost operation is a means of improving generator performance during a low voltage or low battery state-of-charge condition.
Each electrical power management function, either idle boost or load shed, is discrete. No two functions are active at the same time. Idle boost is activated in incremental steps, idle boost 1 must be active before idle boost 2 can be active. The criteria used by the body control module (BCM) to regulate electrical power management are outlined below:
- Electrical Power Management Block Diagram
K9 Body Control Module K20 Engine Control Module G13 Generator
Function
Battery Temperature Calculation
Battery Voltage Calculation
Amp-Hour Calculation
Action Taken
Idle Boost 1 Start
Less Than −15°C (5°F)
Less Than 13 V
?E/p>
First level Idle boost requested
Idle Boost 1 Start
?E/p>
?E/p>
Battery has a net loss greater than 0.6 Ah
First level Idle boost requested
Idle Boost 1 Start
?E/p>
Less Than 10.9 V
?E/p>
First level Idle boost requested
Idle Boost 1 End
Greater Than −15°C (5°F)
Greater Than −12 V
Battery has a net loss less than 0.2 Ah
First level Idle boost request cancelled
Load Shed 1 Start
?E/p>
?E/p>
Battery has a net loss of 4 Ah
Rear Defrost, Heated Mirrors, Heated Seats cycled OFF for 20% of their cycle
Load Shed 1 Start
?E/p>
Less Than 10.9 V
?E/p>
Rear Defrost, Heated Mirrors, Heated Seats cycled OFF for 20% of their cycle
Load Shed 1 End
?E/p>
Greater Than 12 V
Battery has a net loss of less than 2 Ah
Clear Load Shed 1
Idle Boost 2 Start
?E/p>
?E/p>
Battery has a net loss greater than 1.6 Ah
Second level Idle boost requested
Idle Boost 2 Start
?E/p>
Less Than 10.9 V
?E/p>
Second level Idle boost requested
Idle Boost 2 End
?E/p>
Greater Than 12 V
Battery has a net loss less than 0.8 Ah
Second level Idle boost request cancelled
Idle Boost 3 Start
?E/p>
?E/p>
Battery has a net loss of 10 Ah
Third level Idle boost requested
Idle Boost 3 Start
?E/p>
Less Than 10.9 V
?E/p>
Third level Idle boost requested
Idle Boost 3 End
?E/p>
Greater Than 12 V
Battery has a net loss of less than 6.0 Ah
Third level Idle boost request cancelled
Load Shed 2 Start
?E/p>
Less Than 10 V
Battery has a net loss greater than 12 Ah
Rear Defrost, Heated Mirrors, Heated Seats cycled OFF for 50% of their cycle. The BATTERY SAVER ACTIVE message will be displayed on the DIC
Load Shed 2 Start
?E/p>
Less Than 10.9 V
?E/p>
Rear Defrost, Heated Mirrors, Heated Seats cycled OFF for 50% of their cycle. The BATTERY SAVER ACTIVE message will be displayed on the DIC
Load Shed 2 End
?E/p>
Greater Than 12.6 V
Battery has a net loss of less than 10.5 Ah
Clear Load Shed 2
Load Shed 3 Start
?E/p>
Less Than 11.9 V
Battery has a net loss greater than 20 Ah
Rear Defrost, Heated Mirrors, Heated Seats cycled OFF for 100% of their cycle. The BATTERY SAVER ACTIVE message will be displayed on the DIC
Load Shed 3 End
?E/p>
Greater Than 12.6 V
Battery has a net loss of less than 15 Ah
Clear Load Shed 3
Drive Range, First Gear Engine Braking (Gen 2)
Note: Some models of the 6T30/40/45/50 automatic transmission are equipped with
an electric auxiliary fluid pump for use in hybrid vehicles (BAS+). Hybrid vehicles
do not require internal combusti ...
Engine Component Description
Cylinder Block
The cylinder hollow frame structured in–line 4 cylinder. The block has 5 crankshaft
bearings with the thrust bearing located on the third bearing from the fron ...
Other materials:
Disarming the System
To disarm the system, either unlock the doors using the RKE transmitter, or start
the vehicle with a recognized transmitter in the vehicle.
To avoid setting off the alarm by accident:
Press on the RKE transmitter.
Start the vehicle.
To avoid setting off the alarm by accident:
Lock t ...
Sun Load Temperature Sensor Replacement
Sun Load Temperature Sensor Replacement
Callout
Component Name
1
Sun Load Temperature Sensor Bezel
2
Sun Load Temperature Sensor
Procedure
Disconnect the electrical connector.
Twist ...
K20 Engine Control Module: Programming and Setup
Special Tools
EL-49642 SPS Programming Support Tool
For equivalent regional tools, refer to Special Tools.
Note:
DO NOT program a control module unless directed to by a service procedure
or a service bulletin. If the control module is not properly configured
with the correct ...
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