GMC Chevy Colorado 2023 Manual page 703

reduced functionality while Transport Mode is ON.
Transport Mode is enabled and disabled by either of the
following methods:
With the Scan Tool Diagnostics > Body Control
Module > Control Functions > Power Mode.
Turning the hazard flashers ON, apply and hold
the brake pedal, then press and hold the ignition
mode switch for greater than 15 s. For vehicles
equipped with a DIC a message Transport Mode
On when it is enabled and Transport Mode Off
when it is disabled will be displayed for a
predetermined amount of time. For vehicles
equipped without a DIC, the battery indicator light
will constantly flash on the Instrument Cluster
when Transport Mode is enabled.
Battery Saver Mode
There are 7 different Battery Saver Modes. Battery
Saver Modes 1 to 3 occur in Accessory and Run Power
Modes (vehicle on propulsion system Inactive) if the
battery voltage drops below approximately 11.5 V.
Battery Saver Modes 4 to 7 occur in the Off Power
Mode only. Battery Saver Modes 4 to 7 may set DTC s.
Battery Saver Mode 1: DIC message Battery Low,
Start Vehicle , 4 chimes
Battery Saver Mode 2: DIC message Battery Low,
Start Vehicle , Load Shed Level 3 is activated
Battery Saver Mode 3: DIC message Battery Low,
Start Vehicle , Radio/Infotainment shut off, Load
Shed Level 3 active
Battery Saver Mode 4: Battery Saver Mode
Ignition Off Parasitic Current draw of 100 mA or
greater
Battery Saver Mode 5: Battery Saver Mode
Ignition Off Parasitic Current draw of 1 A or
greater
Battery Saver Mode 6: Battery Saver Mode
Ignition Off Battery Voltage less than 12.0 V
Battery Saver Mode 7: Battery Saver Mode
Ignition Off Battery Voltage less than 11.6 V
Load Shedding
Prior to Load shedding Idle Boost will occur, the idle
speeds will be increased by 25 to 300 RPM to help
maintain a normal battery voltage. Idle Boost may be
noticeable to the driver. If the battery voltage continues
to drop below a normal state then load shedding will go
active and it will start to reduce electric loads for
components that will not impact the safe operation of
vehicle. At load shed levels 2 and 3 a DIC message will
be displayed Reducing Features To Save Battery .
When load shedding is active the customer may begin
to notice features starting to have reduced functions or
may become inoperative. Examples of affected loads
are radio, HVAC blower(s) front and rear (if equipped),
heated/ventilated seats, heated mirrors, rear defogger
and other devices with heavy electrical draws. Idle
Boost and load shed levels can be observed with the
scan tool.
Idle Boost 1
Idle is increased by 25-100 RPM and generally is not
noticeable to most drivers.
2023 - Colorado Electrical Body Builder Manual
Wiring Systems and Power Management
Idle Boost 2
Idle is increased by 50 200 RPM and generally is not
noticeable to most drivers.
Idle Boost 3
Idle is increased by 100 300 RPM and may be
noticeable to most drivers.
Load Shed Level 1
Reduces load current by 25%.
Load Shed Level 2
Reduces load current by 50%.
Load Shed Level 3
Electric loads for components that will not impact the
safe operation of vehicle will be turned Off.
BCM Awake/Sleep States
The BCM is able to control or perform all of the BCM
functions in the awake state. The BCM enters the sleep
state when active control or normal monitoring of
system functions has stopped and a time limit has
passed. The BCM must detect certain wake-up inputs
before entering the awake state. The BCM monitors for
these inputs during the sleep state.
The BCM will enter the awake state if any of the
following wake-up inputs are detected:
Activity on the serial data line
Detection of a battery reconnect
Any door open signal
Headlamps ON
Ignition ON
Park lamps ON
Keyless entry or remote start message
The BCM will enter a sleep state when all of the
following conditions exist:
Ignition OFF, transmitter is out of range
No activity exists on the serial data line.
No outputs are commanded.
No delay timers are actively counting.
No wake-up inputs are present.
If all these conditions are met, the BCM will enter a low
power or sleep condition.
Retained Accessory Power
Description and Operation
Retained Accessory Power
The Retained Accessory Power (RAP) & Interruptible
RAP (IRAP) Circuits are controlled by the K9 Body
Control Module (BCM). The BCM is the Power Mode
Master, it utilizes various Vehicle inputs to determine
the Vehicle Power Mode and sends this information via
Serial Data and providing associated electrical signals
to the entire vehicle for proper feature operation.
The BCM monitors the vehicles power modes, and door
ajar/open switch status to determine whether the
retained accessory power should be initiated and
remain active or be terminated. The RAP output is
optional based on the vehicles option contents. When
utilized, the RAP Output control can be used to control
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