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Home >> Nissan-Datsun >> 2003 >> Sentra L4-2.5L (QR25DE) >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Testing and Inspection >> Component Tests and General Diagnostics
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Component Tests and General Diagnostics

EC-MAIN-01:







EC-MAIN-02:







Wiring Diagram

Diagnostic Procedure Step 1 - 3:




Diagnostic Procedure Step 4 - 7:




Diagnostic Procedure Step 8 - 10:




Diagnostic Procedure Step 11 - 15:




Diagnostic Procedure Step 16:




Diagnostic Procedure

Component Inspection

ECM RELAY







1. Apply 12 V direct current between ECM relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5, 6 and 7.
3. If NG, replace ECM relay.
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