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Home >> Chevrolet >> 2005 >> Uplander LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 17 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> DTC B0021 >> Test Description

Test Description

WARNING: This page is about a different car, the 2005 Chevrolet Malibu. 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. 5:  This step tests to see if the malfunction is caused by the side impact module-RF or by the side impact-RF wiring harness.
  2. 7:  This step tests to see what DTCs are present. If DTC B0021 01 is present, test the side impact module-RF for a short to battery voltage on the high and low circuits. If DTC B0021 02 is present, test the side impact module-RF for a short to ground on the high and low circuits. If DTC B0021 04, 0D, 0E is present, test the side impact module-RF test the high and low circuits for an open circuit and for high or low resistance.
DTC B0021

Step Action Yes No
Schematic Reference: SIR Schematics 
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. Turn OFF the ignition.
  2. Disconnect the side impact module-RF wiring harness in-line connector. Refer to Inflatable Restraint Side Impact Module Wiring Harness Replacement .
  3. Inspect the component and harness sides of the in-line connector for the side impact module-RF wiring harness for damage or corrosion that may cause the malfunction. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Does connector exhibits any signs of damage or corrosion?
Go to Step 3  Go to Step 4 
3
  1. If the in-line connector for the side impact module-RF wiring harness is damaged, the side impact module-RF wiring harness must be replaced. Refer to Inflatable Restraint Side Impact Module Wiring Harness Replacement .
  2. If the wiring harness side of side impact module-RF in-line 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  -
4
  1. Connect the J 38715-A  SIR Driver/Passenger Load Tool to the harness side of the side impact module-RF wiring harness connector. See Special Tools . Use PASSENGER INFLATOR connector.
  2. Turn ON the ignition, with the engine OFF.
  3. IMPORTANT: The J-45289  CANdi Module must be used with the scan tool. See Special Tools .
  4. Use the scan tool to request SIR DTCs displayed.
Does the scan tool indicate that DTC B0014 is current?
Go to Step 6  Go to Step 5 
5 
  1. Turn OFF the ignition.
  2. Disconnect and remove the J 38715-A  . See Special Tools .
  3. Connect the side impact module-RF wiring harness in-line connector.
  4. Remove the side impact module-RF connector. Refer to Inflatable Restraint Side Impact Module Replacement - Front .
  5. Use J 38715-30A adapter to connect the J 38715-A  to the side impact module-RF connector. See Special Tools . Use PASSENGER INFLATOR connector.
  6. Turn ON the ignition, with the engine OFF.
  7. Use the scan tool to request SIR DTCs displayed.
Does the scan tool indicate that DTC B0014 is current?
Go to Step 9  Go to Step 8 
6
  1. Turn OFF the ignition.
  2. Disconnect and remove both the J 38715-A  and adapter. See Special Tools .
  3. Disconnect the inflatable restraint sensing and diagnostic module (SDM) connector. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.
  4. Inspect the SDM connector for damage or corrosion that may cause a malfunction in the side impact module-RF high and/or low circuits. Refer to Testing for Intermittent Conditions and Poor Connections andConnector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 11  Go to Step 7 
7 
  1. If DTC B0021 01 is present, test the side impact module-RF for a short to battery voltage on the high and low circuits.
  2. If DTC B0021 02 is present, test the side impact module-RF for a short to ground on the high and low circuits.
  3. If DTC B0021 04, 0D, 0E is present, test the side impact module-RF high and low circuits for an open circuit and for high or low resistance.
  4. For all the above conditions, 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 
8
  1. Turn OFF the ignition.
  2. Replace the side impact module-RF. Refer to Inflatable Restraint Side Impact Module Replacement - Front .
Did you complete the replacement?
Go to Step 11  -
9
  1. Turn OFF the ignition.
  2. Replace the side impact module-RF wiring harness. Refer to Inflatable Restraint Side Impact Module Wiring Harness Replacement .
Did you complete the replacement?
Go to Step 11  -
10
  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 11  -
11
  1. Connect all SIR components.
  2. Turn ON the ignition, with the engine OFF.
  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