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Diagnosis & Repair Procedure

WARNING: This page is about a different car, the 2002 Suzuki Esteem. However, it is still accessible from the selected car via links, so may be relevant.
  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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