Volt

Air Bag Indicator Circuit Malfunction - Passenger

The passenger air bag ON/OFF indicators are used to notify the driver when the passenger presence system has enabled or disabled the passenger instrument panel air bag. When the ignition is turned ON, the ignition voltage is supplied to the passenger presence module. When the inflatable restraint sensing and diagnostic module (SDM) receives the appropriate serial data message from the passenger presence module the SDM will then provide voltage to the appropriate indicator.

Schematic Reference

SIR Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

SIR System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Note: The passenger air bag ON and OFF indicators may not operate as expected if there are supplemental inflatable restraint (SIR) DTCs. Repair all SIR DTCs before proceeding with this diagnostic.

1. Vehicle in Service Mode.
2. With a scan tool command the passenger air bag ON indicator and passenger air bag OFF indicator ON and OFF. The respective indicators should turn ON and OFF as commanded.

Note: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.

1. Vehicle OFF.
2. Disconnect the harness connector at the P14 passenger air bag disable indicator.
3. Test for less than 10 Ω between the ground circuit terminal 2 and ground.

⇒	If 10 Ω or greater

Repair the open/high resistance in the circuit.

⇓	If less than 10 Ω

4. Vehicle in Service Mode.
5. With a scan tool, command the passenger air bag OFF indictor OFF.
6. Test for less than 11 V between the control circuit terminal 3 and ground.

⇒	If 11 V or greater

6.1.	Vehicle OFF.

6.2.	Disconnect the X1 harness connector at the K36 SDM.

6.3.	Vehicle in Service Mode.

6.4.	Test for less than 1 V between the control circuit and ground.

⇒	If 1 V or greater, repair the short to voltage on the circuit.

⇒	If less than 1 V, replace the K36 SDM.

⇓	If less than 11 V

7. With a scan tool, command the passenger air bag OFF indicator ON.
8. Test for greater than 4 V between the control circuit terminal 3 and ground.

⇒	If 4 V or less

8.1.	Disconnect the harness connector at the K36 SDM.

8.2.	Test for infinite resistance between the control circuit and ground.

⇒	If less than infinite resistance, repair the short to ground on the circuit.

8.3.	Test for less than 2 Ω in each control circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, replace the K36 SDM.

⇓	If greater than 4 V

9. With a scan tool, command the passenger air bag ON indicator OFF.
10. Test for less than 11 V between the control circuit terminal 1 and ground.

⇒	If 11 V or greater

10.1.

Vehicle OFF.

10.2.

Disconnect the X1 harness connector at the K36 SDM.

10.3.

Vehicle in Service Mode.

10.4.

Test for less than 1 V between the control circuit and ground.

⇒	If 1 V or greater, repair the short to voltage on the circuit.

⇒	If less than 1 V, replace the K36 SDM.

⇓	If less than 11 V

11. With a scan tool, command the passenger air bag ON indicator ON.
12. Test for greater than 4 V between the control circuit terminal 1 and ground.

⇒	If 4 V or less

12.1.

Disconnect the harness connector at the K36 SDM.

12.2.

Test for infinite resistance between the control circuit and ground.

⇒	If less than infinite resistance, repair the short to ground on the circuit.

12.3.

Test for less than 2 Ω in each control circuit end to end.

⇒	If 2 Ω or greater, repair the open/high resistance in the circuit.

⇒	If less than 2 Ω, replace the K36 SDM.

⇓	If greater than 4 V

13. Replace the P14 passenger air bag disable indicator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.