2010 Cadillac CTS Sedan AWD V6-3.6L Page 149

2010 Cadillac CTS Sedan AWD V6-3.6L Page 149

SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation/SIR System Description

and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Testing

Note: The passenger presence system (PPS) is a calibrated unit. When replacing the assembly all parts in the service kit must remain together. Do

not mix any of the old parts with the new parts. PPS comes in as part of a service kit which contains a seat foam, pressure sensor and a electronic

control unit (ECU) module (if applicable).

When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected

component/connector:

* PPS module

* PPS sensor wiring harness

1. Verify that no other PPS DTCs are set.

瀚慖f other PPS DTCs are set, investigate those DTCs first.

2. Verify that DTC B0074 0F is not set.

瀚慖f the DTC is set, verify there are no electronic devices on the passenger seat. If not, then verify the seat is dry by removing the trim from

the seat bottom frame. IF the seat is wet, allow 24-48 hours dry time. If the DTC is history, do not replace PPS. Clear PPS codes.

3. Verify that DTC B0074 00, B0074 0D, or B0074 0E is not set.

瀚慖f any of the DTCs are set then replace the PPS module.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* SIR/SRS Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/SIR/SRS Wiring Repairs)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for PPS module replacement, setup, and

programming

B0079

DTC B0079

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.