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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1529 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B0090 >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table:

  1. 6:  This step tests to see if there is an open or high resistance in the I/P module disable switch.
  2. 9:  This step tests to see if there is a short to ground or a short to voltage in the I/P module disable switch-signal circuit.
  3. 10:  This step tests to see if there is a short to ground or a short to voltage in the I/P module disable switch indicator-control circuit.
DTC B0090

Step Action Yes No
Schematic Reference: SIR Schematics 
1 Did you perform the Diagnostic System Check-SIR? Go to Step 2  Go to Diagnostic System Check - SIR 
2
  1. Turn OFF the ignition.
  2. Disconnect the I/P module disable switch harness connector. Refer to Inflatable Restraint Instrument Panel (I/P) Module Disable Switch Replacement .
  3. Inspect the I/P module disable switch harness connector for damage or corrosion that may cause the malfunction. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 3 
3 Inspect the I/P module disable switch terminals for damage or corrosion that may cause the malfunction. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Do the I/P module disable switch terminals exhibit signs of damage or corrosion?		 Go to Step 11  Go to Step 4 
4
  1. Remove the I/P module disable switch indicator harness connector. Refer to Inflatable Restraint Instrument Panel (I/P) Module Disable Switch LED Replacement .
  2. Inspect the I/P module disable switch indicator harness connector for damage or corrosion that may cause the malfunction. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 5 
5 Inspect the I/P module disable switch indicator connector for damage or corrosion that may cause the malfunction. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 6 
6  Test the I/P module disable switch indicator for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 7 
7
  1. Disconnect the inflatable restraint sensing and diagnostic module (SDM) harness connector. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
  2. Inspect the SDM harness connector for damage or corrosion that may cause the malfunction. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 8 
8 Inspect the SDM terminals for damage or corrosion that may cause the malfunction. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Do the SDM terminals exhibit signs of damage or corrosion?		 Go to Step 13  Go to Step 9 
9  Test the I/P module disable switch - signal circuit for a short to ground or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 10 
10  Test the I/P module disable switch indicator - control circuit for a short to ground or a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 11 
11 Replace the I/P module disable switch. Refer to Inflatable Restraint Instrument Panel (I/P) Module Disable Switch Replacement .
Did you complete the replacement?		 Go to Step 12  -
12
  1. Reconnect all SIR components.
  2. Use the scan tool in order to clear the DTCs.
  3. Operate the vehicle within the Conditions for Running the DTC as specified within the supporting text.
Does the DTC rest?		 Go to Step 13  System OK
13 Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
Did you complete the replacement?		 Go to Step 14  -
14
  1. Reconnect all SIR components.
  2. Use the scan tool in order to clear the DTCs.
  3. Operate the vehicle within the Conditions for Running the DTC as specified within the supporting text.
Does the DTC rest?		 Go to Step 2  System OK
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