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 Base, StandardFACTORY OEM SERVICE PROCEDURE

Diagnostic Procedure

CHECK OVERALL FUNCTION

Fig 1: ASCD Indicator Conditions Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

Check ASCD indicator under the following conditions.

OK or NG
1. OK :INSPECTION END
2. NG: GO TO 2.
CHECK DTC
Check that DTC U1000 or U1001 is not displayed.

Yes or No
1. Yes : Perform trouble diagnoses for DTC U1000, U1001, refer to DTC U1000, U1001 CAN COMMUNICATION LINE .
2. No: GO TO 3.
CHECK COMBINATION METER OPERATION
Does combination meter operate normally?

Yes or No
1. Yes : GO TO 4.
2. No : Check combination meter circuit. Refer to COMBINATION METER .
CHECK INTERMITTENT INCIDENT
Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .
1. INSPECTION END

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.