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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 P1530: Ignition Timing Adjustment Switch 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. Ensure test switch terminal of DIAG.-1 test connector (located in engine compartment fuse/relay block located in left side of engine compartment) is not grounded. See Fig 1 . If test switch terminal is grounded, remove jumper wire and repeat DTC CONFIRMATION TEST  . If test switch terminal is not grounded, go to next step.
  3. Turn ignition on. Measure voltage between ground and DIAG.-1 test connector terminal No. 5 (test switch terminal). If voltage is 10-14 volts, problem is probably intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. If reading is not 10-14 volts, go to next step.
  4. Check for short to ground in Purple/White wire between DIAG.-1 ignition timing adjustment test switch and ECM harness connector E92 terminal No. 7. See Figure , and see WIRING DIAGRAMS article. If problem is found, repair as necessary. After repair, repeat DTC CONFIRMATION TEST  . If no problem is found, go to next step.
  5. Substitute a known good ECM, and repeat DTC CONFIRMATION TEST  . If DTC does not reset, testing is complete.
Fig 1: Identifying DIAG.-1 Test Connector Terminals
G98B12337Courtesy of SUZUKI OF AMERICA CORP.
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