B2340

Step 1: Perform visual and physical inspection of the steering column reach mechanism - manually attempt to move the column forward and backward with ignition off to check for binding, rough spots, or complete seizure. Check for physical obstructions under the column.

Step 2: Inspect the reach motor wiring harness and connector for damage, corrosion, loose pins, or water intrusion. Use a digital multimeter to test for continuity on all motor circuit wires and verify less than 0.5 ohms resistance on ground circuits.

Step 3: With ignition on, use multimeter to measure voltage at the reach motor connector during commanded movement (operate adjustment switch). Verify battery voltage is present on power circuit and that polarity reverses when changing direction. Monitor current draw - typical draw is 3-8 amps; stalled motor may draw 15+ amps.

Step 4: If voltage and wiring are correct but motor does not move, disconnect motor and apply direct battery power to test motor operation in both directions. If motor runs freely when disconnected from mechanism, mechanical binding is confirmed. If motor does not run with direct power, motor replacement is required.

Step 5: For intermittent issues, check position sensor feedback signal voltage at BCM connector using a multimeter - should show smooth voltage change (typically 0.5-4.5V range) as column is manually moved through its range.

Step 6: After repair, clear codes, cycle ignition, and perform column adjustment function test in both directions through full range of travel. Monitor live data for motor current draw and position sensor values to verify normal operation.