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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 181 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B0077, B0078, B0079, B0080, B0081 or B0082 >> Test Description

Test Description

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. 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:  This step tests the SIS signal and SIS voltage circuits for an open or high resistance.
  2. 8:  This step tests between the SIS signal and SIS voltage circuits for continuity.
  3. 9:  This step tests the SIS signal and SIS voltage circuits for a short to voltage.
DTC B0077, B0078, B0079, B0080, B0081 or B0082

Step Action Yes No
Schematic Reference: SIR Schematics (AK5 or AJ7)  or SIR Schematics (AW9) 
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 in Vehicle DTC Information
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Use the scan tool to request SIR DTCs displayed.
Does the scan tool indicate that DTC B0079, B0080, B0081 or B0082 is current?		 Go to Step 10  Go to Step 3 
3
  1. Turn OFF the ignition.
  2. If DTC B0077 is current, disconnect the inflatable restraint side impact sensor (SIS) - LF connector. If DTC B0078 is current, disconnect the SIS - RF connector. Refer to Inflatable Restraint Side Impact Sensor Replacement .
  3. Inspect both the component and harness sides of the connector for damage or corrosion. 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 SIS connector is damaged, the SIS must be replaced. Refer to Inflatable Restraint Side Impact Sensor Replacement .
  2. If the harness side of the SIS connector is damaged, replace the harness side of the connector. Refer to Connector Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 11  -
5
  1. Turn OFF the ignition.
  2. Disconnect the inflatable restraint sensing and diagnostic module (SDM) connector. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.
  3. Inspect both the component and harness sides of the SDM connector for damage or corrosion. 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 6  Go to Step 7 
6
  1. If the component side of the SDM connector is damaged, the SDM must be replaced. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.
  2. If the harness side of the SDM connector is damaged, replace the harness side of the connector. Refer to Connector Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 11  -
7 
  1. If DTC B0077 is current, disconnect the SIS - LF connector. If DTC B0078 is current, disconnect the SIS - RF connector.
  2. Test both the SIS signal and SIS voltage circuits for an open or high resistance between the SDM connector and the SIS connector. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 8 
8  Test for continuity between the SIS signal circuit and the SIS voltage circuit on the SDM connector. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 9 
9 
  1. Turn ON the ignition, with the engine OFF.
  2. Test both SIS signal and SIS voltage circuits for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 10 
10
  1. Turn OFF the ignition.
  2. If DTC B0077, B0079 or B0080 was current, replace the SIS - LF. If DTC B0078, B0081 or B0082 was current, replace the SIS - RF. Refer to Inflatable Restraint Side Impact Sensor Replacement .
Did you complete the replacement?		 Go to Step 11  -
11
  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 in the text.
Does the DTC reset?		 Go to Step 12  System OK
12
  1. Turn OFF the ignition.
  2. Replace the SDM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup and programming.
Did you complete the replacement?		 Go to Step 13  -
13
  1. Turn ON the ignition, with the engine OFF.
  2. Use the scan tool in order to clear the DTCs.
  3. Operate the vehicle within the Conditions for Running the DTC as specified in the text.
Does the DTC reset?		 Go to Step 2  System OK
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