Hummer H3. Manual — part 574

Circuit Testing

Connector Repairs

Testing for Intermittent Conditions and Poor Connections

Wiring Repairs

Circuit/System Testing

Ignition OFF. Clear codes and rezero the PPS system.

If DTC 063 resets, replace and rezero the PPS. Refer to Repair Procedures.

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 064

Diagnostic Instructions

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

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC 064

PPS Communication/ID Performance

Circuit/System Description

The Inflatable Restraint Passenger Presence System (PPS) is used to monitor the weight of an
occupant on the front outboard passenger seat and communicate the status to the sensing and
diagnostic module (SDM) whether to enable or suppress the deployment of the instrument panel
(I/P) module. The PPS consist of an electronic control module, silicone filled sensor pad,
pressure sensor, seat belt tension retractor sensor, wiring harness and PASSENGER AIR BAG
ON/OFF indicators. The silicone filled sensor pad is located under the passenger seat foam
cushion and is connected by a hose clamped to the pressure sensor. The weight of the occupant

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

sitting in the front passenger seat is measured as a pressure change within the bladder by the
pressure sensor. The pressure sensor sends a voltage signal to the PPS module. If the pressure
from the occupant's weight is less than a specified value, the PPS module will send a suppress
signal to the SDM to disable the I/P module. If the pressure from the occupant's weight is higher
than a specified value, the PPS module will send an enable signal to the SDM to enable the I/P
module. The PPS module will notify the customer of the enable/disable status by turning on one
of the PASSENGER AIR BAG ON/OFF indicators located on the instrument panel. The PPS
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 either DTC B0092 or B0098 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 has lost communications with the SDM.

The PPS verification ID does not match the ID that is stored in the SDM.

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

IMPORTANT: DTC B0098 is an indication that the SDM has received an

incorrect PPS verification ID. The SDM will continue to request
the verification ID from the PPS for 5 seconds. If the SDM does
not receive the correct verification ID from the PPS within 5
seconds, the SDM will set DTC B0098 as current, illuminate the
AIR BAG indicator and disable the I/P module deployment loop. If
either the SDM or PPS were replaced make sure the correct part
numbers were used for the vehicle application.

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

DTC B0092 or B0098 will set if the PPS has a current malfunction and has set DTC 064. The
SDM will set DTC B0092 or B0098 as current and command the AIR BAG indictor ON. This is
done to notify the driver of any PPS malfunctions. When DTC B0092 or B0098 are present it is
important to check the PPS for any current DTCs. Refer to Passenger Presence System Flash
Code Procedures.

Reference Information

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 ON. With the scan tool check for DTC 064 as a current DTC. Refer to Passenger

Presence System Flash Code Procedures.

If DTC 064 is NOT a current DTC, rezero the PPS system.

2. Ignition ON. If DTC 064 is a current DTC, check for DTC B0098 as a current DTC.

If DTC B0098 is a current DTC, refer to DTC B0098.

3. Ignition OFF. Inspect the PPS module, SDM and main seat harness connectors for corrosion

or damage.

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

4. Reconnect all components and test the PPS class 2 serial data circuit for a short to voltage.

If any of the above conditions are found, make the appropriate repair. Reconnect all
components and rezero the PPS.

5. Replace the PPS.

After replacement and rezeroing of the PPS are completed, verify that DTC 064 does
not reset. Perform the repair verification.

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3

6. If DTC 064 resets, replace the SDM.

After replacement and setup of the SDM is completed, rezero the PPS. 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 and SDM replacement, setup and programming

DTC 065

Diagnostic Instructions

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

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

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC 065

PPS Sensor Circuit Out of Range

Circuit/System Description

The Inflatable Restraint Passenger Presence System (PPS) is used to monitor the weight of an
occupant on the front outboard passenger seat and communicate the status to the sensing and
diagnostic module (SDM) whether to enable or suppress the deployment of the instrument panel
(I/P) module. The PPS consist of an electronic control module, silicone filled sensor pad,
pressure sensor, seat belt tension retractor sensor, wiring harness and PASSENGER AIR BAG
ON/OFF indicators. The silicone filled sensor pad is located under the passenger seat foam
cushion and is connected by a hose clamped to the pressure sensor. The weight of the occupant
sitting in the front passenger seat is measured as a pressure change within the bladder by the
pressure sensor. The pressure sensor sends a voltage signal to the PPS module. If the pressure
from the occupant's weight is less than a specified value, the PPS module will send a suppress
signal to the SDM to disable the I/P module. If the pressure from the occupant's weight is higher
than a specified value, the PPS module will send an enable signal to the SDM to enable the I/P
module. The PPS module will notify the customer of the enable/disable status by turning on one
of the PASSENGER AIR BAG ON/OFF indicators located on the instrument panel. The PPS

2007 Hummer H3

2007 RESTRAINTS Supplemental Inflatable Restraints - H3