GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Prizm 🢒 Restraints 🢒 SIR 🢒 DTC 48 LH Side Air Bag Deploy Loop Resistance High

Object Number: 238657 Size: SF
SIR Components
SIR Schematics
SIR Caution
SIR Caution
Handling ESD Sensitive Parts Notice

Circuit Description

When you first turn the ignition switch to the ON position, the inflatable restraint Sensing and Diagnostic Module (SDM) performs tests to diagnose critical malfunctions within itself. The SDM monitors the voltages at DRIVER SEAT LOW terminal 6 to calculate the combined resistance of the driver seat module and its associated wiring.

Conditions for Setting the DTC

The SDM detects an open circuit or high resistance in the driver seat deployment loop.

Action Taken When the DTC Sets
    • The SDM sets a Diagnostic Trouble Code.
    • The SDM flashes the AIR BAG warning lamp.

Conditions for Clearing the DTC

All DTCs are cleared with each ignition cycle.

Test Description

  1. This test checks for an open in the inflatable restraint driver seat module circuits.

    2.

  2. This test determines if the malfunction is caused by the SDM.

    3.

  3. This test determines if the malfunction is caused by the inflatable restraint driver seat module.

Step

Action

Value(s)

Yes

No

1

Was the SIR Diagnostic System Check performed?

--

Go to Step 2

Go to SIR Diagnostic System Check

2

  1. Turn the ignition switch to the OFF position.
  2. Disconnect the inflatable restraint Sensing and Diagnostic Module (SDM).
  3. Disconnect the inflatable restraint driver seat module.
  4. Zero the J 39200 .
  5. Measure the resistance at the seat module harness connector between terminals 1 and 2.

Is the resistance measured less than the specified value?

1 ohms

Go to Step 3

Go to Step 7

3

  1. Connect the SDM.
  2. Connect a jumper wire between terminals 1 and 2 of the seat module harness connector.
  3. Turn the ignition switch to the ACC or ON position and wait 20 seconds.
  4. Read SIR DTCs

Is DTC 48 present?

--

Go to Step 5

Go to Step 4

4

  1. Turn the ignition switch to the OFF position.
  2. Connect the seat module connector.
  3. Turn the ignition switch to ACC or ON and wait 20 seconds.
  4. Read SIR DTCs.

Is DTC 48 present?

--

Go to Step 6

Go to Step 8

5

Replace the inflatable restraint Sensing and Diagnostic Module (SDM). Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .

Are the repairs complete?

--

Go to Step 9

--

6

Replace the inflatable restraint driver seat module. Refer to Inflatable Restraint Seat Module Replacement - Driver .

Are the repairs complete?

--

Go to Step 9

--

7

Repair the IP wiring harness between the driver seat module and the SDM. Refer to Wiring Repair .

Are the repairs complete?

--

Go to Step 9

--

8

An intermittent exists in the driver seat deployment loop. Refer to diagnostic aids.

Are the repairs complete?

--

Go to Step 9

--

9

Reconnect all SIR components. Make sure all components are properly mounted.

Have all the SIR components been reconnected and properly mounted?

--

Go to SIR Diagnostic System Check

--