B00C6

Step 1: Perform a visual inspection of the passenger seat recline mechanism and locate the recline position sensor (typically mounted on the side of the seat frame near the recline pivot). Check for physical damage, loose mounting, or debris interference.

Step 2: Inspect the wiring harness and connector at the recline position sensor for corrosion, bent pins, moisture intrusion, or signs of chafing from seat movement. Disconnect and reconnect the connector while checking for proper pin tension and seal integrity.

Step 3: Using a digital multimeter, backprobe the sensor connector and measure resistance or voltage output while manually moving the seat backrest through its full range of recline positions. Compare readings to manufacturer specifications (typical potentiometer sensors show smooth resistance change from 0.5-4.5V or 500-4500 ohms depending on design).

Step 4: Check continuity and resistance on all wires between the seat sensor connector and the restraint control module connector. Look for opens, shorts to ground, or shorts to power. Pay special attention to areas where wiring flexes during seat adjustment.

Step 5: If wiring and sensor output are within specifications, clear the code and monitor live data while recline the seat multiple times. Watch for intermittent dropouts, erratic readings, or values that freeze. This may indicate an internal sensor fault or poor connection.

Step 6: If all previous tests pass, suspect a control module issue. Verify module ground connections are secure with less than 0.5 ohms resistance to chassis ground, and check for any available software updates or TSBs related to seat sensor calibration.