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Home >> Suzuki >> 2002 >> Esteem GL, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.8L >> Diagnostic Tests >> DTC P1510: Engine Control Module Back-Up Power Supply Malfunction >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. If engine system check has been performed, go to next step. If engine system check has not been performed, go to A4: ENGINE SYSTEM CHECK  under SYSTEM TESTS.
  2. Backprobing at ECM, measure voltage between ground and ECM harness connector E92 terminal 13 (White wire). See Figure . With engine running, voltage reading should be 10-14 volts. If voltage reading is as specified, go to next step. If voltage reading is not as specified, repair open in White wire between DOME fuse (20-amp) located in engine compartment fuse/relay block at left side of engine compartment and ECM. See WIRING DIAGRAMS article.
  3. Check for good terminal contact at ECM harness connector E92. If poor terminal contact is found, repair as necessary. After repair, repeat DTC CONFIRMATION TEST  . If terminal contact is okay, problem is probably intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. If intermittent problem is not found, substitute a known good ECM and repeat DTC CONFIRMATION TEST  . If DTC does not reset, testing is complete.
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