GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 1998 🢒 Prizm 🢒 DTC 🢒 DTC 45 LH Side Air Bag Deploy. Loop Short to GND

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 detect a short to ground in the inflator module circuit.

Conditions for Setting the DTC

The SDM detects a short to ground in the LH front 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.

Diagnostic Aids

A short to ground in the inflatable restraint driver seat module circuit can cause an intermittent condition. Inspect the YEL/RED and YEL/GRN wires leading to the seat module carefully for cut or chafed wires.

Test Description

  1. This test checks for a short to ground in the inflatable restraint driver seat module high circuit.

    2.

  2. This test checks for a short to ground in the inflatable restraint driver seat module low circuit.

    3.

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

    4.

  4. 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. Measure the resistance at the seat module harness connector between terminal 1 and ground.

Is the resistance measured equal to the specified value?

OL

(Infinite)

Go to Step 3

Go to Step 8

3

Measure the resistance at the seat module harness connector between terminal 2 and ground.

Is the resistance measured equal to the specified value?

OL

(Infinite)

Go to Step 4

Go to Step 8

4

  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 45 present?

--

Go to Step 6

Go to Step 5

5

  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 45 present?

--

Go to Step 7

Go to Step 9

6

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

Are all the repairs complete?

--

Go to Step 10

--

7

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

Are all the repairs complete?

--

Go to Step 10

--

8

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

Are all the repairs complete?

--

Go to Step 10

--

9

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

Are all the repairs complete?

--

Go to Step 10

--

10

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

--