Hummer H3. Manual — part 571

DIAGNOSTIC STARTING POINT - SIR

Begin the system diagnosis with Diagnostic System Check - Vehicle . The Diagnostic System
Check - Vehicle will provide the following information:

The identification of the control modules which commands the system

The ability of the control modules to communicate through the serial data circuit

The identification of any stored diagnostic trouble codes (DTC) and their status

The use of Diagnostic System Check - Vehicle will identify the correct procedure for
diagnosing the system and where the procedure is located.

PASSENGER PRESENCE SYSTEM FLASH CODE PROCEDURES

Introduction

B0079, B0080, B0081 or
B0082
DTC B0083 or B0084

Seat Position Sensor Circuit

DTC B0092

Passenger Presence System Performance

DTC B0098

Passenger Presence System Configuration Error

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

Front End Sensor

DTC B1001

SDM Option Configuration Error

DTC B1530

Discard Passenger Presence System 1

DTC B3855, B3856 or
B3857

Rollover Sensor

DTC U1241

will set when the Tech 2 is used to flash DTCs from the PPS or

after the PPS has been rezeroed. DTC U1241 does not indicate

a system malfunction and will not cause any warning indicators

to illuminate. When DTC U1241 sets, cycle the ignition and use

the scan tool to clear the code, no further diagnosis is necessary.

For more detailed information concerning the PPS, refer to

SIR System Description and Operation. For more detailed

information concerning PPS flash code and rezeroing

procedures, refer to Passenger Presence System Flash Code

Procedures and Passenger Presence System Programming

and Setup .

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM)
performs tests to diagnose critical malfunctions within itself. When the SDM has completed the
power-up mode the SDM will establish communication with the passenger presence system
(PPS). The PPS will respond by performing diagnostic tests to check for proper circuit continuity
and for shorts to ground and voltage within the PPS. If the PPS detects a malfunction, the PPS
will set a DTC, communicate with the SDM that a malfunction has occurred and request the
SDM to disable the instrument panel (I/P) module deployment loop. The SDM will respond by
disabling the I/P module deployment loop, setting either DTC B0092 or B0098 and commanding
the AIR BAG indicator ON. The SDM sets either DTC B0092 or B0098 to notify the driver of a
PPS malfunction. The DTCs that the PPS set are non-class 2 and have to be flashed through the
PASSENGER AIR BAG ON/OFF indicators located on the instrument panel. The procedures
below are designed to assist in the flashing of these codes. Before you start, read these procedures
carefully and completely. For further information regarding the PPS refer to SIR System
Description and Operation.

Passenger Presence System (PPS) Flash Code Procedure

1. Empty the front outboard passenger seat.

2. Install a scan tool.

3. Turn ON the ignition, with the engine OFF.

4. With a scan tool, request the passenger presence system (PPS) to flash DTCs.

5. When the PPS receives a valid request to flash DTCs, the PPS will perform the following:

1. Illuminate both PASSENGER AIR BAG ON and OFF indicators located on the

instrument panel for 1 second.

2. Turn OFF both PASSENGER AIR BAG ON and OFF indicators for 1 second.

3. Flash the first number of the DTC using the OFF indicator. Count the number of times

the OFF indicator flashes to obtain the first number of the DTC.

4. Flash the second number of the DTC using the ON indicator. Count the number of

times the ON indicator flashes to obtain the second number of the DTC.

IMPORTANT: When flashing PPS codes, the instrument panel cluster (IPC) and

dash lights will begin dimming on and off. This is normal
operation during the flashing procedure and does not indicate
additional system faults.

IMPORTANT: If after 30 seconds of a successful request to flash codes and no

additional flashes are observed, then the PPS does not have any
stored codes.

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

5. When the flashing procedure is initiated, the PPS will flash all current and history

DTCs that are stored. After all DTCs have been flashed, to determine if the DTCs are
current or history, the PPS will reflash the DTCs that are stored as current only. Any
DTC that is not reflashed is stored as a history DTC.

6. If the flashing procedure was unsuccessful repeat this procedure. Due to the communication

status between the SDM and the PPS module, this procedure may have to be repeated until
a successful flashing attempt has been achieved.

7. Refer to the Diagnostic Trouble Code (DTC) List - Vehicle , to diagnose the DTCs you

have obtained.

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 to supplement the diagnostic
procedures. Begin all of the diagnostic procedures with the Diagnostic System Check - Vehicle.
Refer to the Diagnostic System Check - Vehicle . Use the SIR Scan Tool Data List after
determining the following:

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

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.

SIR Scan Tool Data List

Scan Tool Parameter

Data List

Units Displayed

Typical Data

Value

Operating Conditions: Ignition ON/Engine OFF/Driver Seat Belt BUCKLED

8-Digit GM Part Number

Module

Information 2

8-Digit Number

XXXXXXXX

Calibration ID

Module

Information 1

4-Digit Number

Varies

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

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.

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 SDM serial number.

Component Serial Number

Module

Information 2

4-Digit Number

XXXX

Driver Side Belt Status

Inputs

Buckled/Unbuckled

Buckled

Driver Side Impact Sensor ID

Module

Information 1

2-Digit Number

43

Electronic Front End Sensor 1
ID

Module

Information 1

2-Digit Number

51

Electronic Front End Sensor 2
ID

Module

Information 1

2-Digit Number

51

Ignition Voltage

Data

Volts

12 Volts

Julian Date of Build

Module

Information 1

3-Digit Number

Varies

Passenger Side Belt Status

Inputs

Buckled/Unbuckled

Unbuckled

Passenger Side Impact Sensor
ID

Module

Information 1

2-Digit Number

43

ROM ID

Module

Information 1

4-Digit Number

Varies

Year Module Built

Module

Information 1

4-Digit Number

Varies

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3