gonzo 6.2

iTrader: (8)

HI

Anyone come across a B0090 airbag code?dam light stays on,it will go off if you turn the activated manual switch to air bag ON.This started when i unpludded my cluster with the key on.It wouldnt clear with the scanner that retived the code.Any help would be apperciated.2000 sierra
I know this is the car section not the truck but I bet one of you car gurus can help quicker.
DTC B0090 Active switch voltage out of range
What are the odds I replace the switch and it takes care of it?Went to the dealer,they dont stock it,they must rarely fail??????Local want $78,online OE dealer $51

ACW

2000 GMC Truck GMC K Sierra - 4WD

"DTC B0090 Active Switch Voltage Out of Range

Circuit Description

When you first turn the ignition switch to the RUN position, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. The SDM monitors the voltage levels at the passenger frontal SIR enable and disable terminals of the SDM to determine the position of the inflatable restraint IP module switch. The SDM then performs the following continuous diagnostic tests on the deployment loops:
- Deployment loop voltage out of range test
- Deployment loop resistance measurement test

If the voltage out of range test detects a short to voltage condition, the resistance measurement test for that deployment loop will not be performed.

Conditions for Running the DTC
- Ignition 1 voltage is within the normal operating voltage range.
- Passenger frontal SIR enable circuit is not shorted to voltage.
- Passenger frontal SIR disable circuit is not shorted to voltage.

Conditions for Setting the DTC
- The voltage detected at passenger frontal SIR enable terminal and passenger frontal SIR disable terminal are less than 1.0 volt when the AIR BAG ON lamp is commanded ON.
- The voltage detected at passenger frontal SIR enable terminal and passenger frontal SIR disable terminal are greater than 4.0 volts when the AIR BAG ON lamp is commanded OFF.
- The voltage detected at passenger frontal SIR enable terminal and passenger frontal SIR disable terminal are greater than 1.0 volt when the AIR BAG OFF lamp is commanded ON.

Action Taken When the DTC Sets
- The inflatable restraint IP module switch is defaulted to a calibration state.
- The SDM commands ON the AIR BAG warning lamp via Class 2 serial data.

Conditions for Clearing the DTC
- The inflatable restraint IP module switch AIR BAG lamp is OFF, and the voltage at passenger frontal SIR enable terminal and passenger frontal SIR disable terminal are in opposite states for 300 milliseconds.
- You issue a scan tool CLEAR CODES command.
- A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

When the SDM detects that no DTCs are present, the SDM commands the AIR BAG warning lamp OFF.

The following can cause an intermittent condition:
- A short between the passenger frontal SIR enable and passenger frontal SIR disable circuits.
- Refer to Testing for Intermittent and Poor Connections in Wiring Systems."


Not going through the whole troubleshooting table, but here are the possible solutions from it:

- Repair or replace the the inflatable restraint IP module switch harness connector.
- Locate and repair an open or high resistance in the inflatable restraint IP module switch ground circuit.
- Locate and repair an open or high resistance in the inflatable restraint IP module switch power feed circuit between the fuse block and the IP module switch.
- Locate and repair an open or high resistance in the passenger SIR enable circuit.
- Locate and repair an open or high resistance in the passenger SIR disable circuit.
- Locate and repair a short to ground in the passenger SIR enable circuit.
- Locate and repair a short to ground in the passenger SIR disable circuit.
- Locate and repair a short to voltage in the passenger SIR disable circuit.
- Locate and repair a short to voltage in the passenger SIR enable circuit.
- Locate and repair a short between the passenger SIR enable and Passenger SIR disable circuits.
- Repair or replace the inflatable restraint sensing and diagnostic module (SDM) harness connector.
- Repair or replace the inflatable restraint IP module switch harness connector.
- Replace the inflatable restraint IP module switch.

So it's possible it's not the switch, there are some other potential causes.

gonzo 6.2

iTrader: (8)

Did the GM diagnostic proceedures,after all elliminations it came down to the switch,$53 later its fixed.thanks for all repies.