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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 309 (Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC B305E: Interruptible RAP Relay Circuit >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2017 GMC Acadia. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF/Vehicle OFF, disconnect the harness connector at the K84 Keyless Entry Control Module.
  2. Momentarily Install a 3 A fused jumper wire between the control circuit terminal 7 X1 and B+.
  3. Verify the test lamp turns ON and OFF at the ignition circuits listed below and ground when connecting and disconnecting the jumper wire.
    • X51A Fuse Block - Instrument Panel - Fuse F20DA
    • X51A Fuse Block - Instrument Panel - Fuse F24DA
    • X51A Fuse Block - Instrument Panel - Circuit breaker F42DA
    • If the test lamp is always OFF 
    1. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance.
    2. Test for less than 2 Ω in the 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 X51A Fuse Block - Instrument Panel.
    • If the test lamp is always ON 
    1. 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 the test lamp turns ON and OFF 
  4. Replace the K84 Keyless Entry Control Module.
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