B1380

Step 1: Perform a visual inspection of the oil change reset button for physical damage, broken mounting, or obvious wear. Test the button's mechanical operation by pressing it to ensure it clicks properly and is not stuck or broken.

Step 2: Using a digital multimeter, access the reset button connector and measure continuity across the switch terminals while pressing and releasing the button. Expected reading should show open circuit (infinite resistance) when not pressed and continuity (near 0 ohms) when pressed.

Step 3: Inspect all wiring from the reset button to the BCM/instrument cluster for chafing, cuts, pinches, or signs of rodent damage. Check for proper ground continuity by measuring resistance from the button ground terminal to chassis ground (should read less than 1 ohm).

Step 4: Disconnect the reset button connector and check for corrosion, bent pins, or moisture intrusion. Clean connectors with electrical contact cleaner if corrosion is present. Verify proper pin tension and connection quality.

Step 5: With the button disconnected, measure voltage supply at the connector from the BCM/cluster side (typically 5V or 12V reference). If no voltage is present, trace wiring back toward the control module for breaks or check for blown fuses in the body control circuit.

Step 6: If all wiring and button test correctly, clear the code and perform a functional test of the reset button through the scan tool's bi-directional controls or actuator tests to verify BCM/cluster recognition of button presses. If still failing, suspect BCM or instrument cluster internal fault.