DTC B1797. Pontiac Vibe

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2009 🢒 Vibe - FWD 🢒 DTC 🢒 DTC B1797

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 Descriptors

DTC B1797: Passenger Presence System Calibration

Circuit/System Description

This DTC identifies a malfunction within the passenger presence system (PPS). If the sensing and diagnostic module (SDM) detects a malfunction within the PPS module, a DTC will be set.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

•	Calibration has failed.

•	Calibration performed with conditions for calibration not satisfied.

Action Taken When the DTC Sets

•	The SDM commands the AIR BAG indicator ON.

•	The SIR System is disabled and no deployments are allowed.

Conditions for Clearing the DTC

•	The condition for setting the DTC no longer exists.

•	A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Reference Information

Electrical Information Reference

•	Circuit Testing

•	Testing for Intermittent Conditions and Poor Connections

•	Connector Repairs

•	Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information.

Circuit/System Testing

Important: Refer to SIR Service Precautions .

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

•	The front end sensor

•	The SDM module

•	The front end sensor wiring harness connector

•	The SDM wiring harness connector

Connect all SIR components. Ignition ON, with a scan tool clear and check for DTCs.

⇒	If the DTC is not current, perform PPS rezeroing procedure.

Using a scan tool, observe the following parameters:

•	Pressure sensor output, 0-2

•	Theremister temperature output, 3-40°C (37-104°F)

•	Current DTCs, 0

•	History DTCs, 0

⇒	If the parameters are not as specified, replace the PPS seat sensor.

⇒	If the parameters are as specified, perform PPS rezeroing procedure.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

•	Inflatable Restraint Front End Sensor Replacement

•	Inflatable Restraint Side Impact Sensor Replacement

•	SIR/SRS Wiring Repairs

•	Control Module References for SDM replacement, setup, and programming