GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Vivant 🢒 DTC 🢒 DTC 017

Circuit Description

When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform tests to diagnose critical malfunctions within itself. After passing these tests, ignition and deployment loop voltages are measured to ensure that they are within their respective normal voltage ranges. The SDM then proceeds with the resistance measurement test. Passenger low terminal A8 is grounded through a current sink, and the passenger current source is connected to the passenger high terminal to allow a known amount of current to flow. By monitoring the voltage difference between passenger high and passenger low, the SDM calculates the combined resistance of the passenger inflator module, the harness wiring, and the connector terminal contacts.

Conditions for Setting the DTC
    • Resistance of the passenger deployment loop is higher than 4.5 ohms for 500 milliseconds.
    • Voltage at passenger high is less than 2 volts and resistance of the passenger deployment loop is equal to or higher than 4.5 ohms for 500 milliseconds.
    • Ignition voltage is within a specified value.

Action Taken When the DTC Sets

The SDM will turn on the AIRBAG indicator and set a diagnostic trouble code DTC 17.

Conditions for Clearing the DTC
    • The resistance between passenger high and passenger low is less than 4.5 ohms for 500 milliseconds.
    • Voltage at passenger high is higher than 2 volts and resistance of the passenger deployment loop is less than 4.5 ohms for 500 milliseconds.
    • Turn OFF the ignition switch.
    • The scan tool CLEAR CODES command is received.

Diagnostic Aids

An intermittent condition is likely to be caused by a poor connection, either at the passenger airbag connector or at terminals A3 and A8 of the SDM. An open wire in the passenger deployment loop will also set DTC 17.

Caution: Refer to Sensing and Diagnostic Module Voltage after Ignition is Turned Off Caution in the Preface section.

Caution: Refer to Sensing and Diagnostic Module Handling Caution in the Preface section.

Step

Action

Yes

No

1

Perform the Diagnostic System Check - SIR.

Is the Diagnostic System Check - SIR complete?

Go to Step 2

Go to Diagnostic System Check - SIR

2
  1. Turn OFF the ignition and remove the key.
  2. Disconnect the passenger airbag connector.
  3. Inspect the terminals for damage or improper connection.
  4. Repair any damaged pins or terminals on the wiring harness side of the connector. If the airbag side of the connector is damaged, the passenger airbag must be replaced.
  5. If no damage was found, connect the passenger airbag yellow two-way connector and make sure it is seated properly.
  6. Turn ON the ignition.

Is the DTC still displayed?

Go to Step 3

System OK

3
  1. Turn OFF the ignition and remove the key.
  2. Temporarily disconnect the two-way yellow connectors at the passenger airbag.
  3. Check terminals A3 and A8 at the SDM.

Are there any loose wires or damaged pins or terminals?

Go to Step 4

Go to Step 5

4
  1. Repair any loose or damaged pins or SDM terminals.
  2. Make sure all SIR components are reconnected and all components are properly mounted.

Did you complete the repair?

Go to Diagnostic System Check - SIR

--

5

Check for an open circuit between the SDM and the passenger airbag connector.

Refer to Diagnostic Illustration 1 in SIR Diagnostic Illustrations .

Go to Step 6

Go to Step 7

6
  1. Repair the open circuit between the SDM and the passenger inflator module.
  2. Make sure all SIR components are reconnected and all components are properly mounted.

Did you complete the repair?

Go to Diagnostic System Check - SIR

--

7
  1. Replace the SDM. The arrow must be pointing toward the front of the vehicle.
  2. Connect all SIR components, and ensure that all components are properly mounted.
  3. Perform the Diagnostic System Check - SIR. Refer to Diagnostic System Check - SIR .

Is DTC 17 still current?

Go to Step 8

System OK

8
  1. Turn OFF the ignition and remove the key.
  2. Disconnect the yellow connector at the passenger airbag.
  3. Replace the passenger airbag module.
  4. Make sure all SIR components are reconnected and all components are properly mounted.

Did you complete the repair?

Go to Diagnostic System Check - SIR

--