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Vauxhall Workshop Service and Repair Manuals

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Symptoms - SIR > < DTC B0014-B0045

Astra J

Air Bag Indicator Circuit Malfunction (Passenger)

Diagnostic Instructions

•  Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
•  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
•  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information



Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance

Passenger Air Bag OFF Indicator Control
2
2*
4
-

Passenger Air Bag ON Indicator Control
3
3*
5
-

Passenger Air Bag Disable Indicator Ground
-
1
1
-

1. Both indicators always OFF

2. The OFF indicator will not illuminate

3. The ON indicator will not illuminate

4. The OFF indictor always ON

5. The ON indicator always ON

* High resistance may cause the appropriate indicator to illuminate less bright than normal
 

Circuit/System Description

The passenger air bag ON/OFF indicators are used to notify the driver when the instrument panel inflator module is enabled or disabled . When the sensing and diagnostic module (SDM) receives the signal from the passenger presence sensor indicating someone is sitting in the passenger seat, the SDM will then provide voltage to the appropriate indicator.

Reference Information


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

Circuit/System Verification


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. Ignition ON.
2. The passenger seat unoccupied.
3. Verify the scan tool Passenger Seat Occupancy Status parameter displays Empty.
    ⇒  If Passenger Seat Occupancy Status parameter does not display Empty.

    ⇒ Refer to Circuit/System Testing

    ⇓  If Passenger Seat Occupancy Status parameter displays Empty.

4. The passenger seat unoccupied.
5. Verify the passenger air bag OFF indicator is illuminated.
    ⇒  If passenger air bag OFF indicator is not illuminated.

    ⇒ Refer to Circuit/System Testing

    ⇓  If passenger air bag OFF indicator is illuminated.

6. The passenger seat occupied.
7. Verify the scan tool Passenger Seat Occupancy Status parameter displays Occupied.
    ⇒  If the scan tool Passenger Seat Occupancy Status parameter does not display Occupied.

    ⇒ Refer to Circuit/System Testing

    ⇓  If the scan tool Passenger Seat Occupancy Status parameter displays Occupied.

8. With the passenger seat occupied.
9. Verify the passenger air bag ON indicator is illuminated.
    ⇒  If passenger air bag ON indicator is not illuminated.

    ⇒ Refer to Circuit/System Testing

    ⇓  If passenger air bag ON indicator is illuminated.

10. All OK.

Circuit/System Testing


Note:  removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected.
•  S26 Hazard warning switch.
•  S26 Hazard warning switch wiring harness.

1. Ignition OFF.
2. Disconnect the harness connector at the S26 Hazard Warning Switch.
3. Test for less than 5 Ω between the ground circuit terminal 1 and ground.
    ⇒  If 5 Ω or greater

  3.1 Ignition OFF.
  3.2 Disconnect the harness connector at the K36 SDM.
  3.3 Test for less than 2 Ω in the low reference 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 less than 5 Ω

4. Ignition ON.
5. The passenger seat occupied.
6. Test for less than 11 V between the control circuit terminal 2 and ground.
    ⇒  If 11 V or greater

  6.1 Ignition OFF.
  6.2 Disconnect the harness connector at the K36 SDM.
  6.3 Ignition ON.
  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. The passenger seat unoccupied.
8. Test for greater than 25 Ω between the control circuit terminal 2 and ground.
    ⇒  If 25 Ω 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 25 Ω

9. The passenger seat unoccupied.
10. Test for less than 11 V between the control circuit terminal 3 and ground.
    ⇒  If 11 V or greater

  10.1 Ignition OFF.
  10.2 Disconnect the harness connector at the K36 SDM.
  10.3 Ignition ON.
  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. The passenger seat occupied.
12. Test for greater than 25 Ω between the control circuit terminal 3 and ground.
    ⇒  If 25 Ω 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 25 Ω

13. Replace the S26 Hazard Warning Switch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Hazard Warning Switch Replacement

Control Module References for SDM replacement, setup, and programming

Symptoms - SIR > < DTC B0014-B0045