Hummer H2. Manual — part 2058

SCAN TOOL DATA LIST

The SIR Scan Tool Data List contains all the restraint system related parameters that are available on the scan
tool. The parameters in the list are arranged in alphabetical order. The column, "Data List," indicates the
location of the parameter within the scan tool menu selections.

Use the SIR Scan Tool Data List as directed by a diagnostic table or in order to supplement the diagnostic
procedures. Begin all of the diagnostic procedures with the SIR Diagnostic System Check. Use the SIR Scan
Tool Data List after the following are determined:

z

There is no published DTC procedure nor published symptom procedure for the customer concern.

z

The DTC or symptom diagnostic procedure indicated by the diagnostic system check does not resolve the
customer concern.

The Typical Data Values are obtained from a properly operating vehicle under the conditions specified in the
first row of the Scan Tool Data List table. Comparison of the parameter values from the suspect vehicle with the
Typical Data Values may reveal the source of the customer concern.

2

Install a scan tool.
Does the scan tool power up?

Go to Step 3

Go to Scan Tool Does Not

Power Up in Data Link

Communications

3

Attempt to establish
communication with the
inflatable restraint sensing and
diagnostic module (SDM).
Does the scan tool communicate
with the SDM?

Go to Step 4

Go to Scan Tool Does Not

Communicate with Class 2

Device in Data Link

Communications

4

1. Use the scan tool to

request the SIR diagnostic
trouble code (DTC)
display.

2. Record the displayed DTC

(s) on the repair order,
specifying as current or
history.

Does the scan tool display any
current or history DTCs?

Go to Step 5

System OK

5

Does the scan tool display any
DTC's which begin with a "U"?

Go to Scan Tool Does Not

Communicate with Class 2

Device in Data Link

Communications

Go to Step 6

6

Does the scan tool display DTC
B1000?

Go to DTC B1000 in Body

Control System

Go to Diagnostic Trouble

Code (DTC) List

2004 Hummer H2

2004 RESTRAINTS SIR - Hummer H2

SIR Scan Tool Data List

SCAN TOOL DATA DEFINITIONS

The SIR scan tool data definitions contain a brief description of all SIR related parameters available on the scan
tool. The parameters that are available on the scan tool are listed below in alphabetical order.

8 Digit GM Part Number

The scan tool displays an 8 digit part number. This number is the GM part number that is stored within
the SDM memory.

Active Switch

The scan tool displays enabled or disabled. The signal from the inflatable restraints I/P module disable
switch indicates whether the passenger frontal air bag is enabled or disabled.

Calibration ID

The scan tool displays a 4 digit number. This calibration ID is the check sum of the SDM read only
memory contents.

Component Serial Number

The scan tool displays the digits of the SDM serial number.

Driver Side Belt Status

The scan tool displays Buckled or Unbuckled. The signal from the drivers seat belt switch indicates
whether the driver seat is buckled or unbuckled.

Scan Tool Parameter

Data List

Units Displayed

Typical Data Value

Ignition ON/Engine OFF/Driver Seat Belt Buckled/Active Switch Enabled

8-Digit GM Part Number

Module Information 2

8-digit number

XXXXXXXX

Active Switch

Inputs

Enabled/Disabled

Enabled

Calibration ID

Module Information 1

4-digit number

Varies

Component Serial Number

Module Information 2

4-digit number

XXXX

Driver Side Belt Status

Inputs

Buckled/Unbuckled

Buckled

Electronic Front End Sensor 1 ID

Module Information 1

2-digit number

Varies

Electronic Front End Sensor 2 ID

Module Information 1

2-digit number

Varies

Ignition Voltage

Data

Volts

12 volts

Julian Date of Build

Module Information 1

3-digit number

Varies

ROM ID

Module Information 1

4-digit number

Varies

Year Module Built

Module Information 1

4-digit number

Varies

2004 Hummer H2

2004 RESTRAINTS SIR - Hummer H2

Electronic Front End Sensor ID

The scan tool displays a 2 digit ID number. The ID signal is sent to the SDM from the front end sensor.

Ignition Voltage

The scan tool displays 0-20 volts. The Ignition represents the system voltage measured by the SDM at its
ignition feed.

Julian Date of Build

The scan tool displays a 3 digit number. Which represents the day of the year the module was built.

ROM ID

The scan tool displays a 4 digit number. This number is the programmable read-only memory (PROM)
ID.

Year Module Built

The scan tool displays what year the module was built.

DIAGNOSTIC TROUBLE CODE (DTC) LIST

Diagnostic Trouble Code (DTC) List

DTC B0016, B0017, OR B0018

Circuit Description

The passenger deployment loop consists of a inflatable restraint I/P module, the I/P module high and I/P module

DTC

Description

Module

B0016, B0017, or B0018

DTC B0016, B0017, or B0018

SDM

B0022, B0024, or B0026

DTC B0022, B0024, or B0026

SDM

B0051

DTC B0051

SDM

B0053

DTC B0053

SDM

B0090

DTC B0090

SDM

B0091

DTC B0091

SDM

B0100, B0101, B0102, B0103,

B0104, or B0105

DTC B0100, B0101, B0102, B0103,
B0104, or B0105

SDM

B1001

DTC B1001

SDM

U1001 - U1254

DTC U1001-U1254 in Data Link
Communications

EBCM, Passlock Module,
PCM, SDM, VIM

U1300 and U1301

DTC U1300, U1301, or U1305 in Data
Link Communications

EBCM, Passlock Module,
PCM, SDM, VIM

2004 Hummer H2

2004 RESTRAINTS SIR - Hummer H2

low circuits. There is a shorting bar used within the I/P module connector which will short together both I/P
module high and low circuits when the connector is disconnected, this will help to prevent unwanted
deployment of the inflator module during servicing. During a frontal crash of sufficient force the inflatable
restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order
to deploy the I/P module. The SDM performs continuous diagnostic tests on the deployment loops to check for
proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a diagnostic trouble
code (DTC) will be stored in memory.

Conditions for Running the DTC

Ignition 1 voltage is within the normal operating voltage range.

Conditions for Setting the DTC

z

DTC B0016 will set when the I/P module deployment loop resistance is less than 1.3 ohms for 500
milliseconds.

z

DTC B0017 will set when one of the following conditions occurs:

{

I/P module high circuit is less than 2.4 volts and the I/P module deployment loop is more than 6
ohms for 500 milliseconds.

{

I/P module deployment loop resistance is more than 4.8 ohms for 500 milliseconds.

z

DTC B0018 will set when one of the following conditions occur:

{

I/P module high and/or low circuits is short to ground or short to voltage for 500 milliseconds.

{

I/P module high circuit is less than 2.4 volts and I/P module deployment loop resistance is less than
6 ohms for 500 milliseconds.

Action Taken When the DTC Sets

The SDM commands the AIR BAG indicator ON via Class 2 serial data.

Conditions for Clearing the DTC

z

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is
used.

z

A history DTC will clear once 255 malfunction free ignition cycles have occurred.

Diagnostic Aids

The following are possible causes of the malfunction:

z

A short between the I/P module high and low circuits.

z

An open or a high resistance in the I/P module high or low circuits.

z

A short to ground or a short to voltage in the I/P module high or low circuits.

z

The I/P module connector

z

The SDM connector

2004 Hummer H2

2004 RESTRAINTS SIR - Hummer H2