B1706

Step 1: Perform visual inspection of the driver seat recline switch assembly for physical damage, broken components, or signs of liquid intrusion. Check for proper switch operation by feel and listen for clicking when activating the rearward recline function.

Step 2: Locate and disconnect the driver seat switch connector. Using a digital multimeter, check for continuity across the recline rearward switch terminals while activating the switch. Expect 0-5 ohms when pressed, infinite resistance when released.

Step 3: With the switch connector still disconnected, inspect all pins and terminals for corrosion, bent pins, or pushed-back terminals. Use electrical contact cleaner and verify proper terminal seating. Check wiring harness under the seat for chafing, cuts, or pinch points caused by seat rail movement.

Step 4: Trace the wiring from the seat switch connector to the BCM connector. Check continuity of the recline rearward switch signal wire and ground wire end-to-end. Expect less than 1 ohm resistance through each wire. Check for short to ground or short to power (should read infinite resistance).

Step 5: If all wiring and connections test good, verify BCM power and ground circuits are intact with multimeter. Check BCM connector pins for corrosion or damage. If switch and wiring are confirmed functional, suspect BCM internal fault.

Step 6: After repair, clear codes and cycle the seat recline function through full range of motion multiple times. Verify code does not return and switch operates properly in both directions.