GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 Vivant 🢒 Restraints 🢒 SIR 🢒 DTC 016

Circuit Description

When the ignition switch is turned to ON, the sensing and diagnostic module (SDM) will perform a turn-on test to diagnose critical malformations within the SDM itself. Upon passing these test 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 passenger high, terminal A3, the SDM calculates the combined resistance of the passenger inflator module, wiring harness, and connector terminal contacts.

Conditions for Setting the DTC

DTC 16 will set when the resistance of the passenger deployment loop is below a specified value. The test is run once each ignition cycle during the resistance measurement test when:

    • The resistance between passenger high and passenger low is less then 1.2 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 diagnostic trouble code DTC 16.

Conditions for Clearing the DTC
    • The resistance between passenger high and passenger low is higher then 1.2 ohms for 500 milliseconds.
    • Turn OFF the ignition switch is turned.
    • The scan tool CLEAR CODES command is received.

Diagnostic Aids

All intermittent condition is likely to be the caused by a short between the passenger high and low circuits, a short between passenger high and driver high circuits, or a short between passenger high and the driver low circuit. The problem could also be a malfunctioning shorting bar in passenger airbag connector, which would require replacement of passenger airbag module. The test for this DTC is run only while the AIRBAG indicator is performing the turn-on test. When a scan tool CLEAR CODES command is issued and the malfunction is still present, the DTC will not reappear until next ignition cycle.

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

Values

Yes

No

1

Perform the Diagnostic System Check - SIR.

Is the Diagnostic System Check - SIR complete?

--

Go to Step 2

Go to the Diagnostic System Check - SIR

2
  1. TurnOFF the ignition and remove the key.
  2. Connect the scan tool to the Data Link Connector (DLC).
  3. Turn ON the ignition.

Is the DTC 22 also displayed?

--

Go to Step 3

Go to Step 4

3
  1. Turn OFF the ignition and remove the key.
  2. Disconnect the yellow airbag connectors at the steering column, at the passenger airbag and connector C221.
  3. Repair the short between the driver airbag high circuit and the passenger airbag high circuit.
  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

--

4
  1. Turn OFF the ignition and remove the key.
  2. Make sure the passenger airbag module yellow two-way connector is seated properly.

Is the yellow two-way passenger airbag connector seated properly?

0 V

Go to Step 6

Go to Step 5

5
  1. Seat the passenger airbag yellow two-way connector.
  2. Make sure all SIR components are reconnected all components are properly mounted.

Did you complete the repair?

0 V

Go to Diagnostic System Check - SIR

6
  1. Temporarily disconnect the passenger airbag, the yellow clock spring connector on the steering column and connector C221.
  2. Check for a short between the passenger high and passenger low circuits.

Refer to Diagnostic Illustration 2 in SIR Diagnostic Illustrations .

Is there a short between the passenger high and low circuits?

--

Go to Step 7

Go to Step 8

7
  1. Repair the short between the passenger high circuit and the passenger low circuit.
  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

--

8

Check for a short between the passenger high and driver low circuits.

Refer to Diagnostic Illustration in SIR Diagnostic Illustrations .

Is there a short between the passenger high and driver low circuits, SDM terminals A3 and A8?

--

Go to Step 9

Go to Step 10

9
  1. Repair the short between the passenger high circuit and the driver low circuit.
  2. Make sure all SIR components are reconnected and all components are properly mounted.
  3. Command CLEAR CODES with the scan tool.

Did you complete the repair?

--

Diagnostic System Check - SIR

--

10
  1. Replace the SDM. The arrow must be pointing toward the front of the vehicle.
  2. Connect all SRS components, and ensure that all components are properly mounted.
  3. Perform the Diagnostic System Check - SIR.

Is the DTC 16 still displayed.

--

Go to Step 11

System OK

11
  1. Disconnect the passenger airbag electrical connector.
  2. Replace the passenger airbag module.
  3. Make sure all SIR components are reconnected and all components are properly mounted.
  4. Command CLEAR CODES with the scan tool.

Did you complete the repair?

--

Go to Diagnostic System Check - SIR

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