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Home >> Suzuki >> 2002 >> Esteem GL, 4D Sedan, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.6L >> Diagnostic Tests >> DTC P1500: Starter Signal Circuit 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 C20 terminal No. 16 (Black/Yellow wire). See Figure . Voltage reading should be 6-10 volts while engine is cranking and zero volts after engine starts. If voltage readings are not as specified, go to next step. If readings are as specified, go to step  4 .
  3. Repair open in circuit between ignition switch and ECM harness connector C20 terminal No. 16 (Black/Yellow wire). See WIRING DIAGRAMS article. After repair, repeat DTC CONFIRMATION TEST  .
  4. Turn ignition off. Disconnect ECM 16-pin harness connector C20. ECM is located under instrument panel, behind glove box. See Figure . Check for poor terminal contact at ECM harness connector C20. 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, go to next step.
  5. Substitute a known good ECM, and repeat DTC CONFIRMATION TEST  . If DTC does not reset, testing is complete.
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