GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 1999 🢒 Catera 🢒 Restraints 🢒 SIR 🢒 DTC 53 Configuration Mismatch

Circuit Description

The SDM performs test to diagnose critical malfunctions within itself when the ignition switch is turned ON. Upon passing these tests the Ignition, the VLR, and the deployment loop voltages are measured to ensure they are within their respective normal voltage ranges. Next, the SDM proceeds with the Initialization tests including the Diagnostics Resistance Measurements. Then, the SDM goes into a Continuous Monitoring mode.

Conditions for Setting the DTC

There is a mismatch between the serial data configuration programming request and the SDM determined vehicle system configuration. This malfunction is detected immediately when the ignition switch is turned to the ON position.

Action Taken When the DTC Sets
    • The SDM turns ON the AIR BAG warning lamp.
    •  The SDM sets a DTC 53.

Conditions for Clearing the DTC

Current and History DTC codes must be cleared using a scan tool Clear DTC Information command. If the circuit fault has been successfully repaired and the conditions which caused the DTC to set are no longer existing, the DTC may be cleared using the scan tool. If the SDM determines that the vehicle system configuration matches serial data configuration programming attempt, a Current DTC 53 will change to a History DTC 53, which may be cleared using the scan tool.

Test Description

An example test description follows:

  1. This step checks to see if the SDM is properly configured.

    2.

  2. This step programs the SDM.

DTC 53 Configuration Mismatch

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. Install the scan tool.
  3. Turn the ignition switch to the ON position.
  4. Use the scan tool to request the SIR data list display.

Does the SDM Configuration show the specified value?

Driver and Passenger

Go to Step 3

Go to Sensing and Diagnostic Module Integrity Check

3

  1. DTC 53 indicates that a mismatch between the serial data configuration programming request and the inflatable restraint sensing and diagnostic and seat belt pretensioner module (SDM) determined vehicle system configuration.
  2. Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic and Seat Belt Pretensioner Module Replacement .
  3. Install the scan tool.
  4. Use the scan tool to select the PROGRAMMING SDM function from the SIR main menu.
  5. Follow the instructions displayed on the scan tool in order to program the SDM.

Is the SDM programming procedure complete?

--

Go to SIR Diagnostic System Check

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