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For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Express - AWD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Passenger Presence System Indicator Circuit Malfunction

Circuit Description

The PASSENGER AIR BAG ON/OFF indicators, located in the center of instrument panel cluster (IPC), are used to notify the driver when the passenger presence system (PPS) has enabled or disabled the I/P inflator module. When the ignition is turned ON, the PPS module is supplied with voltage and commands both PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds, then the PPS module conducts tests on the PPS components and circuits while both PASSENGER AIR BAG ON/OFF indicators are ON. If no malfunctions are detected, the PPS module will turn the PASSENGER AIR BAG indicator ON or OFF, depending on the status of the PPS. If a malfunction is detected, the PPS module will store a diagnostic trouble code (DTC), default the PPS to the OFF state, and communicate with the SDM that a DTC has been set. The SDM will request the IPC to turn the AIR BAG indicator ON to notify the driver of a PPS malfunction.

Diagnostic Aids

The following are possible causes of the malfunction:

    • A short in the passenger air bag OFF indicator control circuit
    • A short in the passenger air bag ON indicator control circuit
    • An open or high resistance in the passenger air bag OFF indicator control circuit
    • An open or high resistance in the passenger air bag ON indicator control circuit

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections .

Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. Tests the Passenger AIR BAG ON/OFF indicator ignition 1 voltage circuit for a short to ground, high resistance, or an open.

    2.

  2. Tests the passenger air bag OFF indicator control circuit for a short to ground, a high resistance, or an open.

    3.

  3. Tests the passenger air bag ON indicator control circuit for a short to ground, a high resistance, or an open.

    4.

  4. Tests the PPS module for proper operation.

Step

Action

Yes

No

Schematic Reference: SIR Schematics

Connector End View Reference: SIR Connector End Views

1

Did you perform the Diagnostic System Check - Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle

2
  1. Turn OFF the ignition.
  2. Disconnect the passenger presence system (PPS) module connector located under the passenger seat. Refer to Control Module References for replacement, setup, and programming.
  3. Inspect the PPS module connector for damage or corrosion that may cause the malfunction. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Does connector exhibits any signs of damage or corrosion?

Go to Step 10

Go to Step 3

3
  1. Disconnect the passenger AIR BAG ON/OFF indicator connector. Refer to Inflatable Restraint Instrument Panel Module Indicator Replacement .
  2. Inspect the passenger AIR BAG ON/OFF indicator connector for damage or corrosion that may cause the malfunction. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Does connector exhibits any signs of damage or corrosion?

Go to Step 10

Go to Step 4

4

  1. Turn OFF the ignition.
  2. Test the passenger AIR BAG ON/OFF indicator ignition 1 voltage circuit for a short to ground, a high resistance, or an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 5

5

Test the PASSENGER AIR BAG OFF indicator control circuit between the Passenger AIR BAG ON/OFF indicator and the PPS for a short to voltage, high resistance, or an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 6

6

Test the PASSENGER AIR BAG ON indicator control circuit between the Passenger AIR BAG ON/OFF indicator and the PPS for a short to voltage, high resistance, or an open. Refer to Circuit Testing and Wiring Repairs .

Did you find and correct the condition?

Go to Step 10

Go to Step 7

7

  1. Turn OFF the ignition.
  2. Connect a test lamp between the ignition 1 voltage circuit and the passenger air bag OFF indicator control circuit on the Passenger AIR BAG ON/OFF indicator connector.
  3. Empty the front passenger seat.
  4. Turn ON the ignition, with the engine OFF.

Does the test lamp illuminate?

Go to Step 8

Go to Step 9

8
  1. Turn OFF the ignition.
  2. Replace the Passenger AIR BAG ON/OFF indicator. Refer to Inflatable Restraint Instrument Panel Module Indicator Replacement .

Did you complete the replacement?

Go to Step 10

--

9
  1. Turn OFF the ignition.

    2. Important: The PPS is a calibrated system. The PPS must receive the PPS preload test procedure after replacement.

  2. Replace the PPS, the PPS is only serviceable as PPS, heated seat element, and seat bottom foam assembly. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 10

--

10
  1. Connect all SIR and PPS components.
  2. Turn ON the ignition, with the engine OFF.
  3. Use the scan tool in order to clear the DTCs.
  4. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK