GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2006 🢒 Vibe - FWD 🢒 Restraints 🢒 SIR 🢒 DTC B1660

Circuit 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.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B1660 Passenger Air Bag Disabled Indicator Circuit Malfunction

Conditions for Running the DTC

Ignition 1 voltage is within the normal operating voltage range.

Conditions for Setting the DTC

The SDM detects a malfunction in the passenger air bag ON/OFF indicator circuit.

Action Taken When the DTC Sets

The SDM commands the AIR BAG indicator ON.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

Diagnostic Aids

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.

The following are possible causes of the malfunction:

    • A short to ground in the passenger air bag ON/OFF indicator circuits
    • A short between the passenger air bag ON/OFF indicator circuits
    • A passenger air bag ON/OFF indicator malfunction
    • An internal SDM malfunction

If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections .

Test Description

The number below refer to the step numbers on the diagnostic table.

  1. Tests for a short to ground, or short between circuits in the passenger air bag ON/OFF indicator circuits.

Step

Action

Values

Yes

No

Schematic Reference: SIR Schematics

Connector End View Reference: SIR Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

--

Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Turn OFF the ignition.
  2. Disconnect the passenger air bag ON/OFF indicator connector.
  3. Inspect both the component and harness sides of the connector for the following conditions:
    4. • Corrosion
    • Damaged terminals
    • Poor contact/terminal tension

Did you find and correct the condition?

--

Go to Step 8

Go to Step 3

3

  1. Disconnect the passenger air bag ON/OFF indicator connector.
  2. Turn ON the ignition.

Does the ON or OFF indicator illuminate?

--

Go to Step 6

Go to Step 4

4
  1. Disconnect the sensing and diagnostic module (SDM) connector.
  2. Inspect the SDM connector for the following conditions:
    3. • Corrosion
    • Damaged terminals
    • Poor contact/terminal tension

Did you find and correct the condition?

--

Go to Step 8

Go to Step 5

5

Test the passenger air bag indicator ON/OFF circuits for the following conditions:

    • A short to ground
    • A short between circuits
        Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 8

Go to Step 7

6

Replace the passenger air bag ON/OFF indicator.

Did you complete the replacement?

--

Go to Step 8

--

7

Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .

Did you complete the replacement?

--

Go to Step 8

--

8
  1. Reconnect all SIR components.
  2. Verify that all components, connectors, and connector position assurances (CPAs) are properly mounted.
  3. Use the scan tool in order to Clear the DTCs.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

--

Go to Step 2

System OK