vy commodore srs air bag fault

Summary

In this video, a mechanic diagnoses and repairs an airbag issue in a 2004 Holden Commodore. The airbag light remains on due to a fault in the right-hand seatbelt pre-tensioner circuit, which is traced to an open circuit caused by an unplugged connector. Upon further inspection, it’s revealed that the seat was replaced with a non-original one, causing missing wiring for the airbag system. The mechanic fixes the wiring, clears the fault code, and successfully resolves the airbag issue. Additionally, the seat motor wiring is addressed, ensuring both the airbag system and seat function properly again.

Takeaways

• 😀 The vehicle in question is a 2004 Holden Commodore with airbag system issues, specifically an airbag light constantly illuminating on the dashboard.
• 😀 The main issue identified by the technician is a fault with the right-hand pretensioner circuit, which has high resistance, often indicative of an open circuit.
• 😀 The scan tool revealed that the right-hand pretensioner showed abnormal resistance (999 ohms), confirming a wiring issue.
• 😀 Upon visual inspection, the technician discovers that the airbag module on the passenger seat had been replaced but was not properly connected to the wiring.
• 😀 The technician finds a missing connector under the passenger seat, with exposed wires, likely causing the airbag issue.
• 😀 The technician suspects that the driver’s seat may have been swapped with a non-original seat, as the required airbag wiring for the seat is missing.
• 😀 Using a wiring diagram, the technician confirms the mismatched wiring and missing connections for the driver’s seat airbag.
• 😀 The technician proceeds to repair the wiring for the seatbelt pretensioner by connecting the wires according to the proper wiring diagram.
• 😀 The seat motor wiring is also repaired by reconnecting a faulty connector, allowing the seat to move up and down as intended.
• 😀 After completing the repairs, the technician clears the fault codes using the scan tool, and the airbag light on the dashboard is no longer illuminated.
• 😀 Final tests confirm that the seat motor operates properly, and the airbag system is functioning correctly, resolving the initial issue.

Q & A

What was the initial problem with the 2004 Holden Commodore?

The customer reported an airbag issue, specifically the airbag warning light constantly appearing on the dashboard.

What did the technician find when checking the airbag system using the scan tool?

The technician found a fault code indicating a 'right-hand pretensioner circuit resistance too high,' which typically means an open circuit in the wiring.

What does high resistance in the pretensioner circuit typically indicate?

High resistance in the pretensioner circuit usually indicates an open circuit, meaning there is a break or disconnect in the wiring.

What was the state of the wiring under the passenger seat when inspected?

Upon inspection, the technician found that the wiring for the right-hand pretensioner was hanging loose with no connector attached, suggesting prior tampering.

What did the technician discover about the airbag module and seat wiring?

The technician discovered that the airbag module had been replaced, but the wiring did not match the original configuration, indicating the seat had been swapped with one that did not have the appropriate airbag wiring.

What was the cause of the missing wire for the driver’s seat airbag?

The missing wire was due to the car originally not having an airbag in the driver's seat. The new seat, which did have an airbag, did not match the car's original wiring, leading to the missing connection.

How did the technician repair the pre-tensioner circuit?

The technician reconnected the wiring for the pre-tensioner circuit, matching the brown and white wire to the brown and yellow-red wires based on the wiring diagram.

What was done to fix the seat motor functionality?

The technician repaired the faulty seat motor switch connector, allowing the seat to move up and down as intended.

Why was the technician not concerned about the missing airbag wiring for the driver’s seat?

The technician determined that the car did not originally come with a driver's seat airbag. Therefore, the missing wire was not critical to the repair, and the seat swap had caused the issue.

What was the final outcome of the repairs performed on the car?

After completing the repairs, the airbag light was turned off, the pre-tensioner circuit was functioning correctly, and the seat motor was operating properly, resolving the customer's concerns.