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Home >> Chevrolet >> 2003 >> SSR Base >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> Supplemental Inflatable Restraint System >> Diagnostic Information and Procedures >> DTC B0090: I/P Module Disable Switch Signal And I/P Module Suppression Indicator Control Is Low Or High >> Test Description

Test Description

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

  1. 5:  Tests for an open or high resistance in the I/P module disable switch power feed circuit.
  2. 6:  Tests for an open or high resistance in the I/P module disable switch ground circuit.
  3. 8:  Tests for an open or high resistance in the I/P module disable switch signal circuit.
  4. 9:  Tests for a short in the I/P module disable switch signal circuit.
  5. 10:  Tests for short in the I/P module suppression indicator control circuit.
  6. 11:  Tests for an open or high resistance in the I/P module suppression indicator control circuit.
DTC B0090

Step Action Value(s) Yes No
Schematic Reference: SIR Schematics 
Connector End View Reference: SIR Connector End Views 
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. Turn the I/P module disable switch to the ON position.
  3. Turn ON the ignition, with the engine OFF.
Does the I/P module disable switch ON indicator illuminate in the I/P module disable switch?		 - Go to Step 7  Go to Step 3 
3
  1. Turn OFF the ignition.
  2. Disconnect the I/P module disable switch connector. Refer to Inflatable Restraint Instrument Panel (I/P) Module Disable Switch Replacement .
  3. Inspect the I/P module disable switch connector for corrosion or damage. 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 13  Go to Step 4 
4
  1. Disconnect the SDM connector. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
  2. Inspect the SDM connector for corrosion or damage. 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 13  Go to Step 5 
5  Test the I/P module disable switch power feed circuit for an open or high resistance. Refer to Circuit Testing and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 6 
6  Test the I/P module disable switch ground circuit for an open or high resistance. Refer to Circuit Testing and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 7 
7
  1. Install a scan tool.
  2. Turn the I/P module disable switch to the ON position.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the SIR data list.
Does the I/P module disable switch (active switch) show the specified state?		 Enabled Go to Step 9  Go to Step 8 
8 
  1. Turn OFF the ignition.
  2. Test the I/P module disable switch signal circuit for an open or high resistance. Refer to Circuit Testing and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 9 
9  Test the I/P module disable switch signal circuit for a short. Refer to Circuit Testing and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 10 
10  Test the I/P module suppression indicator control circuit for a short. Refer to Circuit Testing and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 11 
11  Test the I/P module suppression indicator control circuit for an open or high resistance. Refer to Circuit Testing and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 13  Go to Step 12 
12 Replace the I/P module disable switch. Refer to Inflatable Restraint Instrument Panel (I/P) Module Disable Switch Replacement .
Did you complete the repair?		 - Go to Step 13  -
13
  1. Reconnect all SIR system components.
  2. Verify that all components, connectors and 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
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