GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2001 🢒 Prizm 🢒 Engine 🢒 Engine Controls - 1.8L 🢒 Inflatable Restraint Sensing and Diagnostic Module Replacement

CAUTION: Be careful when you handle a sensing and diagnostic module (SDM). Do not strike or jolt the SDM. Before applying power to the SDM:

   • Remove any dirt, grease, etc. from the mounting surface
   • Position the SDM horizontally on the mounting surface
   • Point the arrow on the SDM toward the front of the vehicle
   • Tighten all of the SDM fasteners and SDM bracket fasteners to the specified torque value
Failure to follow the correct procedure could cause air bag deployment, personal injury, or unnecessary SIR system repairs.

Caution: If any water enters the vehicle's interior up to the level of the carpet or higher and soaks the carpet, the sensing and diagnostic module (SDM) and the SDM harness connector may need to be replaced. The SDM could be activated when powered, which could cause deployment of the air bag(s) and result in personal injury. Before attempting these procedures, the SIR system must be disabled. Refer to Disabling the SIR System.

With the ignition OFF, inspect the SDM mounting area, including the carpet. If any significant soaking or evidence of significant soaking is detected, you must perform the following tasks:

  1. Remove all water.
  2. Repair the water damage.
  3. Replace the SDM harness connector.
  4. Replace the SDM.
Failure to follow these tasks could result in possible air bag deployment, personal injury, or otherwise unneeded SIR system repairs.

Removal Procedure
  1. Disable the SIR system. Refer to Disabling the SIR System .

    2. Object Number: 241209 Size: SH
  2. Remove the console in order to access the SDM (1). Refer to Front Floor Console Replacement in Instrument Panel, Gages and Console.
  3. Remove the PCM. Refer to Powertrain Control Module Replacement in Engine Controls.
  4. Remove the under seat duct.
  5. Remove the SDM electrical connectors.
  6. Remove the three SDM fasteners (2).
  7. Remove the SDM assembly (1) from the vehicle.

Installation Procedure

    Object Number: 241209 Size: SH
  1. Install the SDM assembly (1) into the vehicle, taking care to ensure that the connectors are pointing toward the rear of the vehicle.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the three SDM fasteners (2).

    3. Tighten
    Tighten the fasteners to 20 N·m (14 lb in).

  3. Install the SDM electrical connectors.
  4. Install the under seat duct.
  5. Install the PCM. Refer to Powertrain Control Module Replacement in Engine Controls.
  6. Install the center console and then install the rear console. Refer to Front Floor Console Replacement in Instrument Panel, Gages and Console.
  7. Enable the SIR system. Refer to Enabling the SIR System .