Suzuki XL7 2007 Service Manual page 899

Electrical Power Management Description and Operation
Electrical Power Management
The electrical power management (EPM) is used to monitor and control the charging system and alert the driver of
possible problems within the charging system. The EPM system makes the most efficient use of the generator output,
improves the battery state of charge (SOC), extends battery life.
The idle boost operation is a means of improving generator performance during a low voltage or low battery SOC
condition.
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 EPM are outlined below:
Battery Temperature
Function
Idle Boost 1 Start
Idle Boost 1 Start
Idle Boost 1 Start
Idle Boost 1 End
Idle Boost 2 Start
Idle Boost 2 Start
Idle Boost 2 End
Idle Boost 3 Start
Idle Boost 3 Start
Idle Boost 3 End
Starting and Charging Schematics
Calculation
Less Than −15°C
(5°F)
—
—
Greater Than −15°C
Greater Than 12 V
(5°F)
—
—
— Greater Than 12 V
—
—
— Greater Than 12 V
Schematic and Routing Diagram
Battery Voltage
Calculation
Less Than 13 V
Battery has a net loss
—
greater than 0.6 AH
Less Than 11 V
Battery has a net loss
less than 0.2 AH
Battery has a net loss
—
greater than 1.6 AH
Less Than 11 V
Battery has a net loss
less than 0.8 AH
Battery has a net loss
—
Less Than 11 V
Battery has a net loss
of less than 6 AH
Charging System:
Amp-hour
Action Taken
Calculation
First level Idle boost
—
requested
First level Idle boost
requested
First level Idle boost
—
requested
First level Idle boost
request cancelled
Second level Idle
boost requested
Second level Idle
—
boost requested
Second level Idle
boost request
cancelled
Third level Idle boost
of 10 AH requested
Third level Idle boost
—
requested
Third level Idle boost
request cancelled
1J-6