Hummer H3. Manual — part 575

monitors itself for faults and will set flash DTC if a fault is detected. The PPS will also notify the
SDM of a fault. The SDM will respond by setting DTC B0092 and requesting the instrument
panel cluster (IPC) to turn the AIR BAG indicator ON.

Conditions for Running the DTC

Ignition 1 voltage is within the normal operating voltage range.

Conditions for Setting the DTC

The PPS detects the voltage at PPS sensor signal is less than 0.05 volt or greater than 4.5
volts for 500 milliseconds.

The PPS detects the voltage at PPS sensor 5-volt reference is less than 4.5 volts or greater
than 9.1 volts for 500 milliseconds.

The PPS detects the amperage at PPS sensor low reference is 25 mA or greater for 500
milliseconds.

Action Taken When the DTC Sets

The SDM disables the instrument panel (I/P) module deployment loop.

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

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists.

The scan tool CLEAR DTC command has been issued.

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

Diagnostic Aids

Refer to Passenger Presence System Flash Code Procedures for displaying flash codes.

The following can cause an intermittent condition:

A short between the PPS sensor signal, 5-volt reference and low reference circuits.

An open or high resistance between the PPS sensor signal, 5-volt reference and low
reference circuits.

Inspect the PPS sensor signal, 5-volt reference and low reference circuits carefully for
cutting and/or chafing.

Reference Information

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

Schematic Reference

SIR Schematics

Connector End View Reference

SIR Connector End Views

Electrical Information Reference

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs

Circuit/System Testing

1. Ignition OFF. Inspect the PPS module and PPS pressure sensor harness connectors for

corrosion or damage.

If any of the above conditions are found, make the appropriate repair.

2. Reconnect all components and test the PPS sensor circuits for a short to voltage, short to

ground or open/high resistance.

If any of the above conditions are found, make the appropriate repair.

3. Reconnect all components and check for DTC 065 as current.

If DTC 065 is not current, rezero the PPS.

4. Replace and rezero the PPS. After replacement and rezeroing of the PPS are completed,

perform the repair verification.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

SIR/SRS Wiring Repairs

Control Module References for PPS replacement, setup and programming

DTC B0012, B0013, B0014, B0016, B0017 OR B0018

Diagnostic Instructions

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC B0012

Passenger Frontal Deployment Loop (Stage 2) Resistance Low

DTC B0013

Passenger Frontal Deployment Loop (Stage 2) Open

DTC B0014

Passenger Frontal Deployment Loop (Stage 2) Voltage Out of Range

DTC B0016

Passenger Frontal Deployment Loop (Stage 1) Resistance Low

DTC B0017

Passenger Frontal Deployment Loop (Stage 1) Open

DTC B0018

Passenger Frontal Deployment Loop (Stage 1) Voltage Out of Range

Diagnostic Fault Information

DTC B0012, B0013, B0014, B0016, B0017 or B0018

Circuit

Short to

Ground

High

Resistance

Open

Short to

Voltage

Signal

Performance

I/P Module Stage 1 High
Circuit

B0018

B0018

B0017

B0018

B0016

I/P Module Stage 1 Low
Circuit

B0018

B0018

B0017

B0018

B0016

I/P Module Stage 2 High
Circuit

B0014

B0014

B0013

B0014

B0012

I/P Module Stage 2 Low

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

Circuit/System Description

The passenger deployment loop consists of a dual stage inflatable restraint instrument panel (I/P)
module. The I/P module high circuits and the I/P module low circuits exist for both stages 1 and
2. There are 2 shorting bars used within the I/P module connector. These shorting bars short
together the I/P module stage 1 high circuits and low circuits and the I/P module stage 2 high
circuits and low circuits when the connector is disconnected. This prevents 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. This flow of current will 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 voltage is between 9-16 volts.

Conditions for Setting the DTC

B0012 stage 2 or B0016 stage 1

The I/P module deployment loop resistance is less than 1.3 ohms for 500 milliseconds.

B0013 stage 2 or B0017 stage 1

The I/P module stage 1 or stage 2 high circuit is less than 2.4 volts and the I/P module stage
1 or stage 2 deployment loop is more than 6 ohms for 500 milliseconds.

The I/P module stage 1 or stage 2 deployment loop resistance is more than 4.8 ohms for 500
milliseconds.

B0014 stage 2 or B0018 stage 1

The I/P module stage 1 or stage 2 high and/or low circuits is short to ground or short to
voltage for 500 milliseconds.

The I/P module stage 1 or stage 2 high circuit is less than 2.4 volts and I/P module stage 1 or
stage 2 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.

Circuit

B0014

B0014

B0013

B0014

B0012

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3