Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Driver Door Control Unit Circuit Check

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

Check Power Supply Circuit
1. Turn ignition switch OFF.
2. Disconnect driver door control unit (LCU01) connector.
3. Check voltage between driver door control unit (LCU01) connector D8 terminal 14 and ground.
  
  Fig 1: Checking Power Supply Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. 14 (Y/G) - Ground: Battery voltage
OK or NG
1. OK: Go to 2.
2. NG: Check the following.
  - 40A fusible link (letter H. located in fuse and fusible link box).
  - Harness for open or short between driver control unit (LCU01) and fuse.
Check Ground Circuit

Fig 2: Checking Ground Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.

Check continuity between driver door control unit (LCU01) connector D8 terminal 15 and ground.
1. 15 (B) - Ground: Continuity should exist.
OK or NG
1. OK: Inspection end
2. NG: Repair or replace harness.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready Tools Compare Repair Quote Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty

Get a Free Quote

No obligation. See pricing before you book.