PAB (Passenger Air Bag): Meaning, Symptoms, and Diagnosis

PAB stands for Passenger Air Bag. It is the front airbag system designed to protect the front passenger during a severe frontal collision. It is controlled by the SRS (Supplemental Restraint System) module.

What Is a Passenger Air Bag (PAB)?

The Passenger Air Bag is installed inside the dashboard on the passenger side. During a collision, the SRS control module analyzes signals from crash sensors and activates the airbag when deployment conditions are met.

Common Symptoms of PAB Fault

• SRS or Airbag warning light stays ON
• Passenger airbag fault message appears
• Stored B-code diagnostic trouble codes
• Passenger airbag system disabled
• Communication problems with the SRS module

Common Causes of PAB Failure

• Open circuit in passenger airbag wiring
• Damaged dashboard airbag connector
• High resistance in deployment circuit
• Faulty SRS control module
• Previous airbag deployment
• Low battery voltage affecting SRS operation

How to Diagnose PAB Problems?

Passenger Air Bag faults are diagnosed using an SRS-compatible diagnostic scanner. The scanner communicates with the airbag control module and identifies the affected circuit.

PAB Diagnostic Flow:

Crash Sensors
↓
SRS Control Module
↓
Passenger Air Bag Circuit
↓
Diagnostic Scanner
↓
Fault Code Identification

Important Note About Abbreviations

Automotive abbreviations are not always universal. PAB commonly means Passenger Air Bag, but names may vary between manufacturers and diagnostic software. Always confirm the exact meaning using a suitable scan tool or manufacturer service information.

Safety Warning

Passenger airbags contain explosive inflators. Never apply external power or test the airbag circuit incorrectly. Always follow proper SRS safety procedures before repair.

FAQ

Where is the PAB located?

The Passenger Air Bag is usually installed inside the dashboard on the passenger side.

Can a PAB fault turn on the airbag warning light?

Yes. A fault in the passenger airbag circuit can activate the SRS warning light.

Can a basic OBD scanner read PAB faults?

Usually no. An SRS-capable diagnostic scanner is required to access passenger airbag system faults.