GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2004 🢒 Vibe - FWD 🢒 DTC 🢒 DTC B0135, B0136, B0137, or B0138

Circuit Description

The seat belt pretensioner deployment loop consists of a seat belt pretensioner, the seat belt pretensioner - high and seat belt pretensioner - low circuits. A shorting bar is used in the seat belt pretensioner connector which will short together the seat belt pretensioner - high and seat belt pretensioner - low circuits when the connector is disconnected, this will help to prevent unwanted deployment of the pretensioner during servicing. When the ignition is turned ON, the inflatable restraint sensing and diagnostic module (SDM) performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored.

Conditions for Running the DTC

Ignition 1 Voltage is within the normal operating voltage range.

Conditions for Setting the DTC
    • DTC B0135 will set when the SDM detects a low resistance condition in the Seat Belt Pretensioner - LF deployment loop.
    • DTC B0136 will set when the SDM detects a high resistance condition in the Seat Belt Pretensioner - LF deployment loop.
    • DTC B0137 will set when the SDM detects a short to ground in the Seat Belt Pretensioner - LF deployment loop.
    • DTC B0138 will set when the SDM detects a short to voltage in the Seat Belt Pretensioner - LF deployment loop.

Action Taken When the DTC Sets

The SDM commands the AIR BAG indicator to flash.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

Diagnostic Aids

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.

The following are possible causes of the malfunction:

    • A short between the seat belt pretensioner - left - high and the seat belt pretensioner - left - low circuits.
    • An open or high resistance in seat belt pretensioner - left - high or the seat belt pretensioner - left - low circuits.
    • A short to ground in the seat belt pretensioner - left - high or the seat belt pretensioner - left - low circuits.
    • A short to voltage in the seat belt pretensioner - left - high or the seat belt pretensioner - left - low circuits.
    • A malfunctioning seat belt pretensioner.
    • An internal SDM malfunction.

If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Test Description

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

  1. Tests to see if the malfunction is caused by the seat belt pretensioner.

    2.

  2. Tests to see if the malfunction is caused by the seat belt pretensioner.

    3.

  3. If DTC B0135 is present, test for a short between the Seat Belt Pretensioner - left - High and the Seat Belt Pretensioner - left - Low circuits.

    If DTC B0136 is present, test the Seat Belt Pretensioner - left - High and the Seat Belt Pretensioner - left - Low circuits for an open or high resistance.

    If DTC B0137 is present, test the Seat Belt Pretensioner - left - High and the Seat Belt Pretensioner - left - Low circuits for a short to ground.

    If DTC B0138 is present, test the Seat Belt Pretensioner - left - High and the Seat Belt Pretensioner - left - Low circuits for a short to voltage.

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 B0135, B0136, B0137, or B0138 set as a current DTC?

Go to Step 3

Go to Diagnostic Aids

3
  1. Turn OFF the ignition.
  2. Disconnect the seat belt pretensioner - LF connector.
  3. Inspect the connector for damage or corrosion that may cause a short between the Seat Belt Pretensioner - Left - High and the Seat Belt Pretensioner - Left - Low circuits. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs 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 Seat Belt Pretensioner connector is damaged, the Seat Belt Pretensioner must be replaced. Refer to Inflatable Restraint Side Impact Module Replacement - Right Side .
  2. If the harness side of the Seat Belt Pretensioner 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 B0136, B0137 or B0138 set as a current DTC?

Go to Step 7

Go to Step 6

6

Is DTC B0135 set as a current DTC?

Go to Step 8

--

7

  1. Connect a 3 amp fused jumper wire between the Seat Belt Pretensioner - high and the Seat Belt Pretensioner - low circuits on the harness side of the Seat Belt Pretensioner 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 B0136, B0137, or B0138 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 B0135 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 Seat Belt Pretensioner - Left - High and the Seat Belt Pretensioner - Left - 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 B0135 is present, test for a short between the Seat Belt Pretensioner - Left - High and the Seat Belt Pretensioner - Left - Low circuits.
  2. If DTC B0136 is present, test the Seat Belt Pretensioner - Left - High and the Seat Belt Pretensioner - Left - Low circuits for an open or high resistance.
  3. If DTC B0137 is present, test the Seat Belt Pretensioner - Left - High and the Seat Belt Pretensioner - Left - Low circuits for a short to ground.
  4. If DTC B0138 is present, test the Seat Belt Pretensioner - Left - High and the Seat Belt Pretensioner - Left - 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 seat belt retractor - LF. Refer to Seat Belt Retractor Replacement - Right Front .

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