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Home >> Saturn >> 2009 >> Astra XR, 4D Hatchback, Automatic >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Secondary And Configurable Customer Controls >> Diagnostic Information and Procedures >> DTC B3647 >> Component Testing

Component Testing

  1. Disconnect the harness connector at the left steering wheel control switch.
  2. Connect a DMM between terminals 1 and 2 of the left steering wheel control switch.
    • If any of the resistance measurements for the individual switches are not within the specified resistance values, replace the left steering wheel control switch.
Function Switch Minimum Resistance Value Maximum Resistance Value
Scroll Wheel Up 49.7 Ohms 53.7 Ohms
Scroll Wheel Down 117.5 Ohms 121.5 Ohms
Scroll Wheel Press 217.5 Ohms 221.5 Ohms
Voice/Station Presets 397 Ohms 401 Ohms
Phone/CD Changer 756 Ohms 760 Ohms
No Switch Pressed 1855 Ohms 1859 Ohms
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