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.

2005 Nissan-Datsun Sentra Base, AutomaticFACTORY OEM SERVICE PROCEDURE

ECM Relay

Apply 12V direct current between ECM relay terminals 1 and 2.

Check continuity between relay terminals 3 and 5, 6 and 7.

Fig 1: Checking Continuity Between ECM Relay Terminals 3 And 5, 6 And 7

Courtesy of NISSAN MOTOR CO., U.S.A.

ECM RELAY TERMINAL CONTINUITY

Condition	Continuity
12V direct current supply between terminals 1 and 2	Yes
OFF	No

If NG, replace ECM relay.

Factory Service Tools

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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.