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Engine Controls - Trouble Shooting - No-Codes: Diagnosis Suzuki Vitara I

Testing & Diagnostics ~229 words

SYMPTOMS

Note. For specific testing procedures, see SYSTEM & COMPONENT TESTING article. For specifications, see ON-VEHICLE ADJUSTMENTS or SERVICE & ADJUSTMENT SPECIFICATIONS article.

SYMPTOM DIAGNOSIS

Symptom checks cannot be used properly unless the problem occurs while the vehicle is being tested. To reduce diagnostic time, ensure steps in BASIC DIAGNOSTIC PROCEDURES and appropriate SELF-DIAGNOSTICS articles were performed before diagnosing a symptom. Symptoms available for diagnosis include

  1. «DIFFICULT OR NO START (CRANKS OKAY)»(ref-158314-S26280467482003092200000)
  2. «ENGINE STALLS»(ref-158314-S31375780822003092200000)
  3. «ROUGH OR INCORRECT IDLE»(ref-158314-S05685150042003092200000)
  4. «HESITATION/POOR ACCELERATION»(ref-158314-S42169179072003092200000)
  5. «ENGINE SURGES»(ref-158314-S11457900942003092200000)
  6. «DETONATION/SPARK KNOCK»(ref-158314-S36823745082003092200000)
  7. «EXCESSIVE FUEL CONSUMPTION»(ref-158314-S15737034302003092200000)
  8. «LOW COMPRESSION»(ref-158314-S22678920492003092200000)
  9. «ENGINE OVERHEATING»(ref-158314-S13285229612003092200000)
  10. «EXCESSIVE OIL CONSUMPTION»(ref-158314-S15526950252003092200000)
  11. «LOW ENGINE OIL PRESSURE»(ref-158314-S10404311432003092200000)
  12. «ABNORMAL NOISE OR KNOCKING»(ref-158314-S04338971732003092200000)
  13. «ENGINE RUNS TOO COOL»(ref-158314-S21711565682003092200000)

INTERMITTENT PROBLEM DIAGNOSIS

Intermittent fault testing requires duplicating circuit or component failure to identify the problem. These procedures may lead to the computer setting a trouble code which may help in diagnosis.

If problem vehicle does not produce trouble codes, monitor voltage or resistance values using a DVOM while attempting to reproduce conditions causing intermittent fault. A status change on DVOM indicates a fault has been located.

Use a DVOM to pinpoint faults. When monitoring voltage, ensure ignition switch is in ON position or engine is running. Ensure ignition switch is in OFF position or negative battery cable is disconnected when monitoring circuit resistance. Status changes on DVOM during test procedures indicate area of fault.

More articles — Engine Controls - Trouble Shooting - No-Codes