Hummer H2. Manual — part 208

RETAINED ACCESSORY POWER (RAP) DESCRIPTION AND OPERATION

Serial Data Control of Retained Accessory Power (RAP)

The class 2 modules receive the power mode message from the body control module (BCM) over the serial data
circuits, indicating when the RAP power mode is current. The BCM monitors the ignition switch position,
battery condition and passenger compartment doors status to determine whether RAP should be initiated. The
modules then support the operation of the systems under their control as required by their RAP power mode
operation.

RAP will end when one of the following conditions is met:

z

The BCM receives an input or class 2 message indicating the opening of any compartment door.

z

The BCM internal timer for the RAP expires after approximately 10 minutes.

z

The BCM detects a decrease in battery capacity below a prescribed limit.

The BCM then sends a serial data power mode message Off-Awake ending the RAP function.

The class 2 RAP functions are:

z

The power windows

z

The radio

Relay Control of Retained Accessory Power (RAP)

The sunroof is controlled through the sunroof relay. The body control module (BCM) keeps the sunroof relay
energized during all power modes, except Off-Awake. The sunroof relay provides power for sunroof operation.

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Retained Accessory Power - Hummer H2

2004 ACCESSORIES & EQUIPMENT

Cellular Communication - Hummer H2

SPECIFICATIONS

FASTENER TIGHTENING SPECIFICATIONS

Fastener Tightening Specifications

SCHEMATIC AND ROUTING DIAGRAMS

CELLULAR COMMUNICATION SCHEMATIC ICONS

Cellular Communication Schematic Icons

Application

Specification

Metric

English

Antenna Cable Mounting Screw

5 N.m

44 lb in

Antenna Mast

6 N.m

53 lb in

Antenna Mounting Nut

5 N.m

44 lb in

Communication Module

2 N.m

18 lb in

Subwoofer Bolts

9 N.m

80 lb in

Icon

Icon Definition

IMPORTANT:

Twisted-pair wires provide an effective shield
that helps protect sensitive electronic
components from electrical interference. If
the wires were covered with shielding, install
new shielding.
In order to prevent electrical interference
from degrading the performance of the
connected components, you must maintain
the proper specification when making any
repairs to the twisted-pair wires shown:

z

The wires must be twisted a minimum
of 9 turns per 31 cm (12 in) as
measured anywhere along the length of
the wires

z

The outside diameter of the twisted
wires must not exceed 6.0 mm (0.25 in)

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

ONSTAR SCHEMATICS

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2

Fig. 1: OnStar Diagrams
Courtesy of GENERAL MOTORS CORP.

COMPONENT LOCATOR

CELLULAR COMMUNICATION COMPONENT VIEWS

2004 Hummer H2

2004 ACCESSORIES & EQUIPMENT Cellular Communication - Hummer H2