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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1325 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B1185, B1186, B1187, or B1188 >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Pontiac Vibe. 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. 7:  Tests to see if the malfunction is caused by the inflatable restraint IP module.
  2. 8:  Tests to see if the malfunction is caused by the inflatable restraint IP module.
  3. 10:  If DTC B1185 is present, test for a short between the IP Module High and IP Module Low circuits. If DTC B1186 is present, test the IP Module High and IP Module Low circuits for an open or high resistance. If DTC B1187 is present, test the IP Module High and IP Module Low circuits for a short to ground. If DTC B1188 is present, test the IP Module High and IP Module Low circuits for a short to voltage.
DTC B1185, B1186, B1187, or B1188

Step Action Yes No
Schematic Reference:  SIR Schematics  
Connector End View Reference:  SIR Connector End Views  
1 Did you perform A Diagnostic System Check - SIR? Go to Step 2  Go to Diagnostic System Check - SIR 
2 Is DTC B1185, B1186, B1187 or B1188 set as a current DTC? Go to Step 3  Go to Diagnostic Aids
3
  1. Turn OFF the ignition.
  2. Disconnect the IP module connector.
  3. Inspect both the component and harness sides of the connector for damage or corrosion that may cause a short between the IP Module - High and the IP Module - Low circuits. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Does the connector exhibit any signs of damage or corrosion?		 Go to Step 4  Go to Step 5 
4
  1. If the component side of the IP module connector is damaged, the IP module must be replaced. Refer to Inflatable Restraint Instrument Panel Module Replacement .
  2. If the harness side of the IP module connector is damaged, replace the harness side of the connector. Refer to Connector Repairs in Wiring Systems.
Did you complete the replacement?		 Go to Step 13  -
5 Is DTC B1186, B1187 or B1188 set as a current DTC? Go to Step 7  Go to Step 6 
6 Is DTC B1185 set as a current DTC? Go to Step 8  -
7 
  1. Connect a 3 amp fused jumper wire between the IP module - high and the IP module - low circuits on the harness side of the IP module connector.
  2. Turn ON the ignition, with the engine OFF.
  3. Use the scan tool in order to Clear the DTCs.
  4. With the scan tool, request the SIR DTC display.
Does the scan tool indicate that DTC B1186, B1187, or B1188 is current?		 Go to Step 9  Go to Step 11 
8 
  1. Turn ON the ignition, with the engine OFF.
  2. Use the scan tool in order to Clear the DTCs.
  3. With the scan tool, request the SIR DTC display.
Does the scan tool indicate that DTC B1185 is current?		 Go to Step 9  Go to Step 11 
9
  1. Turn OFF the ignition.
  2. Disconnect the SDM connector.
  3. Inspect the SDM connector for damage or corrosion that may cause a short between the IP Module - High and the IP Module - Low circuits. 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 10 
10 
  1. If DTC B1185 is present, test for a short between the IP Module - High and the IP Module - Low circuits.
  2. If DTC B1186 is present, test the IP Module - High and the IP Module - Low circuits for an open or high resistance.
  3. If DTC B1187 is present, test the IP Module - High and the IP Module - Low circuits for a short to ground.
  4. If DTC B1188 is present, test the IP Module - High and the IP Module - Low circuits for a short to voltage.
  5. All the above conditions refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 12 
11
  1. Turn OFF the ignition.
  2. Replace the IP module. Refer to Inflatable Restraint Instrument Panel Module Replacement .
Did you complete the replacement?		 Go to Step 13  -
12 Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
Did you complete the replacement?		 Go to Step 13  -
13
  1. Reconnect all SIR 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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