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Home >> Buick >> 2020 >> Encore Base >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Vehicle Access System >> Diagnostic Information and Procedures >> Liftgate Release Malfunction >> Component Testing

Component Testing

Relay Test

  1. Ignition/Vehicle - Off
  2. Remove the component: KR95A Liftgate Unlatch Relay
  3. Test for 70 to 110 ohms between the test points: Component terminal 85 & 86
    • If not between 70 and 110 ohms 

      Replace the component: KR95A Liftgate Unlatch Relay

    • Go to next step: If between 70 and 110 ohms 
  4. Test for infinite resistance between the test points:
    • Component terminal 30 & 85
    • Component terminal 30 & 86
    • Component terminal 30 & 87
    • Component terminal 85 & 87
    • If less than infinite resistance 

      Replace the component: KR95A Liftgate Unlatch Relay

    • Go to next step: If infinite resistance 
  5. Connect a 3 A fused jumper wire between the test points: Component terminal 86 & 12 V

    Connect a jumper wire between the test points: Component terminal 85 & Ground

  6. Test for less than 2 ohms between the test points: Component terminal 30 & 87
    • If 2 ohms or greater 

      Replace the component: KR95A Liftgate Unlatch Relay

    • Go to next step: If less than 2 ohms 
  7. All OK.

M30 Liftgate Latch-Test

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: M30 Liftgate Latch
  3. Connect a jumper wire between the test points: Ground terminal 1 & Ground
  4. Momentarily connect a 10 A fused jumper wire between the test points: Control terminal 3 & 12 V

    Verify the component turns On and Off when connecting and disconnecting the jumper wire: M30 Liftgate Latch

    • If the component does not turn On and Off 

      Replace the component: M30 Liftgate Latch

    • Go to next step: If the component turns On and Off 
  5. All OK.

S46B Liftgate Unlatch Switch-Test

  1. Ignition/Vehicle - Off
  2. Disconnect the electrical connector: S46B Liftgate Unlatch Switch
  3. Test for infinite resistance between the test points: Signal terminal 1 & Ground terminal 2 - Switch Not Pressed
    • If less than infinite resistance 

      Replace the component: S46B Liftgate Unlatch Switch

    • Go to next step: If infinite resistance 
  4. Test for less than 3 ohms between the test points: Signal terminal 1 & Ground terminal 2 - Switch - Pressed
    • If 3 ohms or greater 

      Replace the component: S46B Liftgate Unlatch Switch

    • Go to next step: If less than 3 ohms 
  5. All OK.
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