GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2009 🢒 Vibe - AWD 🢒 Safety and Security 🢒 Supplemental Inflatable Restraints 🢒 DTC B1660

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 B1660: Passenger Air Bag Disabled Indicator Circuit Malfunction

Circuit/System Description

The passenger air bag ON/OFF indicator circuit consists of the inflatable restraint sensing and diagnostic module (SDM) and the passenger air bag ON/OFF indicator. If the SDM detects a malfunction within the circuit, a DTC will be set.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

Any of the following conditions exist for 2 seconds:

    • The passenger air bag indicator circuit is shorted.
    • The passenger air bag indicator circuit is open.
    • Passenger air bag indicator malfunction.
    • SDM malfunction.

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

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

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

  1. Ignition OFF, disconnect the harness connector at the passenger air bag ON/OFF indicator.
  2. Ignition ON, passenger air bag ON/OFF indicator should not illuminate.
    3. ⇒If passenger air bag ON/OFF indicator illuminates, replace the passenger air bag ON/OFF indicator.
  3. Ignition OFF, disconnect the harness connector at the SDM and the passenger air bag ON/OFF indicator.
  4. Ignition ON, test for 11-14 volt between Passenger air bag On/Off indicator terminal 4 and ground.
    5. ⇒If less than the specified range, repair the circuit for a open/high resistance or short to ground.
  5. Ignition ON, test for less than 1 volt between the following terminals and ground.
    6. • SDM harness connector terminal 17.
    • SDM harness connector terminal 23.
    ⇒If greater than the specified range, repair the circuit for a short to voltage.
  6. Test for infinite resistance between the following terminals and ground.
    7. • SDM harness connector terminal 17.
    • SDM harness connector terminal 23.
    ⇒If less than infinite resistance, repair the circuit for a short to ground.
    ⇒If greater than the specified range, repair the circuit for an open/high resistance.
  7. Test for less then 1 ohm between the following circuit terminals.
    8. • Passenger air bag On/Off indicator terminal 7 and SDM harness connector terminal 23.
    • Passenger air bag On/Off indicator terminal 6 and SDM harness connector terminal 17.
    ⇒If greater than the specified range, repair the circuit for an open/high resistance.
  8. If all circuits test normal, replace the SDM.
  9. Reconnect all SIR components. Ignition ON, with a scan tool clear and check for DTCs.
    10. ⇒If the DTC returns and is current, replace the passenger air bag ON/OFF indicator..

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