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Engine Controls - Trouble Shooting - No-Codes Suzuki Grand Vitara I рестайлинг

Testing & Diagnostics ~3947 words

INTRODUCTION

Note. Some driveability problems may have been corrected by manufacturer with a revised computer calibration chip or computer control unit. Check with manufacturer for latest chip or computer application.

Before diagnosing symptoms or intermittent faults, perform steps in BASIC DIAGNOSTIC PROCEDURES and appropriate SELF-DIAGNOSTICS articles. Use this article to diagnose driveability problems existing when a hard trouble code is not present.

Symptom checks can direct the technician to malfunctioning component(s) for further diagnosis. A symptom should lead to a specific component, system test or an adjustment.

Use INTERMITTENT SIMULATION under TEST PROCEDURES to locate driveability problems that DO NOT occur when the vehicle is being tested. These test procedures should also be used if a soft (intermittent) trouble code was present, but no problem was found during self-diagnostic testing.

Most intermittent faults are caused by faulty electrical connections or wiring. Perform careful inspection of suspect circuits for

  1. Poor mating of coupler halves, or terminals not fully seated in coupler body (backed out).
  2. Terminals damaged or improperly formed. Reform coupler terminals in problem circuit to increase contact tension.
  3. Poor terminal-to-wire connection.

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)»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  2. «ENGINE STALLS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  3. «ROUGH OR INCORRECT IDLE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  4. «HESITATION/POOR ACCELERATION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  5. «ENGINE SURGES»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  6. «DETONATION/SPARK KNOCK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  7. «EXCESSIVE FUEL CONSUMPTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  8. «LOW COMPRESSION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  9. «ENGINE OVERHEATING»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  10. «EXCESSIVE OIL CONSUMPTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  11. «LOW ENGINE OIL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  12. «ABNORMAL NOISE OR KNOCKING»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes)
  13. «ENGINE RUNS TOO COOL»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes__engine-runs-too-cool)

Aerio

  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Faulty ignition coil. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  3. Idle air control system. See «B-6: IDLE AIR CONTROL VALVE SYSTEM CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  4. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in «SELF-DIAGNOSTICS - AERIO 2.0L»(ref-158404) article.
  5. Faulty Throttle Position (TP) sensor. See TP sensor related DTCs in «SELF-DIAGNOSTICS - AERIO 2.0L»(ref-158404) article.
  6. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in «SELF-DIAGNOSTICS - AERIO 2.0L»(ref-158404) article.
  7. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  8. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  9. Faulty Crankshaft Position (CKP) sensor. See CKP sensor related DTCs in «SELF-DIAGNOSTICS - AERIO 2.0L»(ref-158404) article.
  10. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  11. Faulty Positive Crankcase Ventilation (PCV) system. See «POSITIVE CRANKCASE VENTILATION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing__positive-crankcase-ventilation) under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article.

Grand Vitara & XL-7

  1. Idle Air Control (IAC) system. See «B-6: IDLE AIR CONTROL VALVE SYSTEM CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  2. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  3. Engine Control Module (ECM) malfunction. See A3: ENGINE CONTROL MODULE POWER & GROUND CIRCUIT CHECK/ENGINE DOES NOT START under SYSTEMS TEST in appropriate SELF-DIAGNOSTICS article.
  4. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  5. Faulty ignition coil. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  6. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  8. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  9. Check for low engine compression or other internal engine malfunction. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  10. Faulty Positive Crankcase Ventilation (PCV) system. See «POSITIVE CRANKCASE VENTILATION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing__positive-crankcase-ventilation) under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article.

Vitara

  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Faulty ignition coil. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  3. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  4. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  5. Faulty Camshaft Position (CMP) sensor. See CMP sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  6. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  8. Idle Air Control (IAC) system. See «B-6: IDLE AIR CONTROL VALVE SYSTEM CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  9. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) in BASIC DIAGNOSTIC PROCEDURES article.
  10. Faulty Positive Crankcase Ventilation (PCV) system. See «POSITIVE CRANKCASE VENTILATION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing__positive-crankcase-ventilation) under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article.

During A/C Operation (Aerio)

  1. With A/C on. Check A/C signal circuit. See «A/C SIGNALS CIRCUIT CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under MISCELLANEOUS CONTROLS in SYSTEM & COMPONENT TESTING article.

During P/S Operation (Aerio)

  1. With wheels turned, check P/S signal circuit. See «POWER STEERING PRESSURE SWITCH CIRCUIT CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing__power-steering-pressure-switch-circuit-check) under MISCELLANEOUS CONTROLS in SYSTEM & COMPONENT TESTING article.
  2. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  3. Faulty ignition coil. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  4. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  1. Check engine for overheating condition, see «ENGINE OVERHEATING»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-trouble-shooting-no-codes) .
  2. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  3. Faulty ignition coil. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  4. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  5. Misadjusted Throttle Position (TP) sensor. See «THROTTLE POSITION SENSOR»(/suzuki/grand-vitara/i-2000-2006/remont/adjustments/#engine-controls-on-vehicle-adjustments__throttle-position-sensor) under ON-VEHICLE ADJUSTMENTS article.
  6. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  8. Faulty Throttle Position (TP) sensor. See TP sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  9. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  10. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  11. Engine Control Module (ECM) malfunction. See A3: ENGINE CONTROL MODULE POWER & GROUND CIRCUIT CHECK/ENGINE DOES NOT START under SYSTEMS TEST in appropriate SELF-DIAGNOSTICS article.
  12. Check for low engine compression or other internal engine malfunction. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  13. Check brake system for dragging brake. See appropriate DISC & DRUM article in BRAKES.
  14. Check for slipping clutch. See appropriate FWD or RWD article in CLUTCHES.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Faulty ignition coil. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  3. Idle air control system. See «B-6: IDLE AIR CONTROL VALVE SYSTEM CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  4. Fast idle control system malfunction. See «FAST IDLE AIR VALVE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing__fast-idle-air-valve) under IDLE CONTROL SYSTEM in SYSTEM & COMPONENT TESTING article.
  5. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  6. Faulty Throttle Position (TP) sensor. See TP sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  8. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  9. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  10. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  11. EVAP system malfunction. See EVAP system related DTCs in appropriate SELF-DIAGNOSTICS article.
  12. Faulty Positive Crankcase Ventilation (PCV) system. See «POSITIVE CRANKCASE VENTILATION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing__positive-crankcase-ventilation) under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article.
  13. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) in BASIC DIAGNOSTIC PROCEDURES article.
  14. Engine overheating/overcooling. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.

Aerio (Steering Wheel Turned)

  1. When steering wheel is turned. Check power steering pressure switch. See «POWER STEERING PRESSURE SWITCH CIRCUIT CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing__power-steering-pressure-switch-circuit-check) under MISCELLANEOUS CONTROLS in SYSTEM & COMPONENT TESTING article.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Faulty ignition coil with igniter. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  3. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  4. Engine overheating. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.
  5. Thermostat malfunction or cooling system malfunction.
  6. Faulty Throttle Position (TP) sensor. See TP sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Idle Air Control (IAC) system. See «B-6: IDLE AIR CONTROL VALVE SYSTEM CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  8. EVAP system malfunction. See EVAP system related DTCs in appropriate SELF-DIAGNOSTICS article.
  9. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  10. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  11. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  12. Engine Control Module (ECM) malfunction. See A3: ENGINE CONTROL MODULE POWER & GROUND CIRCUIT CHECK/ENGINE DOES NOT START under SYSTEMS TEST in appropriate SELF-DIAGNOSTICS article.
  13. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  14. Faulty Positive Crankcase Ventilation (PCV) system. See «POSITIVE CRANKCASE VENTILATION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing__positive-crankcase-ventilation) under EMISSION SYSTEMS & SUB-SYSTEMS in SYSTEM & COMPONENT TESTING article.
  1. Engine overheating. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.
  2. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) IGNITION CHECKS in BASIC DIAGNOSTIC PROCEDURES article.
  3. Faulty ignition coil. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  4. With A/C on. Check A/C signal circuit. See «A/C SIGNALS CIRCUIT CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under MISCELLANEOUS CONTROLS in SYSTEM & COMPONENT TESTING article.
  5. When steering wheel is turned. Check power steering pressure switch. See «POWER STEERING PRESSURE SWITCH CIRCUIT CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing__power-steering-pressure-switch-circuit-check) under MISCELLANEOUS CONTROLS in SYSTEM & COMPONENT TESTING article.
  6. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  7. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  8. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  9. Idle Air Control (IAC) system. See «B-6: IDLE AIR CONTROL VALVE SYSTEM CHECK»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  10. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  11. Faulty Throttle Position (TP) sensor. See TP sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  12. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  13. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Faulty ignition coil. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  3. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  4. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  5. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  6. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  7. Faulty Throttle Position (TP) sensor. See TP sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  8. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  9. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  10. Engine overheating. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.
  11. Check brake system for dragging brake. See appropriate DISC & DRUM article in BRAKES.
  12. Check for slipping clutch. See appropriate FWD or RWD article in CLUTCHES.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  3. Engine overheating. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.
  4. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  5. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  6. Faulty Throttle Position (TP) sensor. See TP sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  8. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  9. Engine Control Module (ECM) malfunction. See A3: ENGINE CONTROL MODULE POWER & GROUND CIRCUIT CHECK/ENGINE DOES NOT START under SYSTEMS TEST in appropriate SELF-DIAGNOSTICS article.
  10. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Faulty ignition coil. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  3. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  4. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  5. Faulty Throttle Position (TP) sensor. See TP sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  6. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  8. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  9. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  10. Engine overheating. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.
  11. Check brake system for dragging brake. See appropriate DISC & DRUM article in BRAKES.
  12. Check for slipping clutch. See appropriate FWD or RWD article in CLUTCHES.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  3. Fuel pressure out of specification. See FUEL PRESSURE under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  4. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  5. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  6. EVAP control system malfunction. See EVAP control system related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  3. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  4. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  5. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  6. Engine Control Module (ECM) malfunction. See A3: ENGINE CONTROL MODULE POWER & GROUND CIRCUIT CHECK/ENGINE DOES NOT START under SYSTEMS TEST in appropriate SELF-DIAGNOSTICS article.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  3. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__fuel-pressure) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  4. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  5. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  6. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  7. Engine overheating. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.
  1. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  2. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__fuel-pressure) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  3. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  4. Excessive carbon deposits in combustion chambers. Clean combustion chambers as necessary.
  5. Engine overheating. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.
  6. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  7. Improper ignition timing. Check ignition timing. See «IGNITION TIMING»(/suzuki/grand-vitara/i-2000-2006/remont/adjustments/#engine-controls-on-vehicle-adjustments__ignition-timing) in ON-VEHICLE ADJUSTMENTS article.
  8. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  9. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  1. Engine overheating. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.
  2. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  3. Improper ignition timing. Check ignition timing. See «IGNITION TIMING»(/suzuki/grand-vitara/i-2000-2006/remont/adjustments/#engine-controls-on-vehicle-adjustments__ignition-timing) in ON-VEHICLE ADJUSTMENTS article.
  4. Fuel system malfunction. See «FUEL SYSTEM»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-system-component-testing__fuel-system) in SYSTEM & COMPONENT TESTING article.
  5. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  6. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  8. Engine Control Module (ECM) malfunction. See A3: ENGINE CONTROL MODULE POWER & GROUND CIRCUIT CHECK/ENGINE DOES NOT START under SYSTEMS TEST in appropriate SELF-DIAGNOSTICS article.
  9. Excessive carbon deposits in combustion chambers. Clean combustion chambers as necessary.
  1. Engine overheating. See engine overheating related DTCs in appropriate SELF-DIAGNOSTICS article.
  2. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  3. Improper ignition timing. Check ignition timing. See «IGNITION TIMING»(/suzuki/grand-vitara/i-2000-2006/remont/adjustments/#engine-controls-on-vehicle-adjustments__ignition-timing) in ON-VEHICLE ADJUSTMENTS article.
  4. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__fuel-pressure) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  5. Faulty Knock Sensor (KS). See KS related DTCs in appropriate SELF-DIAGNOSTICS article.
  6. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  7. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  8. Excessive carbon deposits in combustion chambers. Clean combustion chambers as necessary.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Improper ignition timing. Check ignition timing. See «IGNITION TIMING»(/suzuki/grand-vitara/i-2000-2006/remont/adjustments/#engine-controls-on-vehicle-adjustments__ignition-timing) in ON-VEHICLE ADJUSTMENTS article.
  3. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  4. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  5. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  6. Faulty Throttle Position (TP) sensor. See TP sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  8. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__fuel-pressure) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  9. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  10. Check brake system for dragging brake. See appropriate DISC & DRUM article in BRAKES.
  11. Check for slipping clutch. See appropriate FWD or RWD article in CLUTCHES.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__fuel-pressure) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  3. Faulty Throttle Position (TP) sensor adjustment. See «THROTTLE POSITION SENSOR»(/suzuki/grand-vitara/i-2000-2006/remont/adjustments/#engine-controls-on-vehicle-adjustments__throttle-position-sensor) in ON-VEHICLE ADJUSTMENTS article.
  4. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  5. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  6. Engine Control Module (ECM) malfunction. See A3: ENGINE CONTROL MODULE POWER & GROUND CIRCUIT CHECK/ENGINE DOES NOT START under SYSTEMS TEST in appropriate SELF-DIAGNOSTICS article.
  7. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  8. Poor cylinderhead valve seating. See appropriate ENGINES article.
  9. Check brake system for dragging brake. See appropriate DISC & DRUM article in BRAKES.
  10. Check for slipping clutch. See appropriate FWD or RWD article in CLUTCHES.
  11. Thermostat malfunction.
  12. Improper tire pressure. Check pressure and inflate as necessary.
  1. Faulty spark plugs. See «IGNITION CHECKS»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__ignition-checks) in BASIC DIAGNOSTIC PROCEDURES article.
  2. Fuel pressure out of specification. See «FUEL PRESSURE»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures__fuel-pressure) under FUEL SYSTEM in SYSTEM & COMPONENT TESTING article.
  3. Faulty fuel injector(s). See «B-2: FUEL INJECTOR CIRCUIT INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under CIRCUIT TESTS in BASIC DIAGNOSTIC PROCEDURES article.
  4. Faulty Engine Coolant Temperature (ECT) sensor. See ECT sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  5. Faulty Throttle Position (TP) sensor adjustment. See «THROTTLE POSITION SENSOR»(/suzuki/grand-vitara/i-2000-2006/remont/adjustments/#engine-controls-on-vehicle-adjustments__throttle-position-sensor) in ON-VEHICLE ADJUSTMENTS article.
  6. Faulty Mass Air Flow (MAF) sensor. See MAF sensor related DTCs in appropriate SELF-DIAGNOSTICS article.
  7. Exhaust Gas Recirculation (EGR) system malfunction. See EGR valve related DTCs in appropriate SELF-DIAGNOSTICS article.
  8. Thermostat malfunction.
  9. Check for low engine compression. See «MECHANICAL INSPECTION»(/suzuki/grand-vitara/i-2000-2006/remont/testing-diagnostics/#engine-controls-basic-diagnostic-procedures) under PRELIMINARY INSPECTION in BASIC DIAGNOSTIC PROCEDURES article.
  10. Check brake system for dragging brake. See appropriate DISC & DRUM article in BRAKES.
  11. Check for slipping clutch. See appropriate FWD or RWD article in CLUTCHES.
  12. Improper tire pressure. Check pressure and inflate as necessary.

All Models

  1. Check for loose spark plug or faulty plug gasket. Repair as necessary.
  2. Burnt valve seat.
  3. Sticky valve stem.
  4. Weak or damaged valve springs.
  5. Blown cylinder head gasket.
  6. Sticky or damaged piston ring.
  7. Worn piston, rings or cylinder.
  1. Check for incorrect engine oil viscosity.
  2. Check for plugged oil filter or oil strainer.
  3. Check for poor oil pump performance.
  4. Check for blown cylinder head gasket.
  5. Check for loose or broken water pump drive belt.
  6. Check for insufficient coolant.
  7. Check for faulty thermostat.
  8. Check for poor water pump performance.
  9. Check for dirty or bent radiator fins.
  10. Check for leaking cooling system.
  11. Check for faulty cooling fan clutch/motor.
  12. Check for plugged radiator.
  13. Check for faulty radiator cap.
  14. Check for dragging brakes.
  15. Check for slipping clutch.
  1. Check for blow cylinder head gasket.
  2. Check for leaking camshaft oil seals.
  3. Check for sticky piston ring.
  4. Check for worn pistons or cylinders.
  5. Check for piston ring groove or piston ring.
  6. Check for incorrect location of piston ring gap.
  7. Check for worn or damaged valve stem seal.
  8. Check for worn valve stem.
  9. Check for malfunctioning PCV valve.
  1. Improper oil viscosity.
  2. Malfunctioning oil pressure switch.
  3. Clogged oil strainer.
  4. Poor oil pump performance.
  5. Worn oil pump relief valve.
  6. Excessive engine bearing, ring and piston clearance.
  1. Check for incorrect valve clearance. Adjust as necessary.
  2. Check for worn valve stem or guide.
  3. Check for weak or broken valve spring.
  4. Check for warped or bent valve.
  5. Check for worn piston, ring or cylinder bore.
  6. Check for worn connecting rod bearing.
  7. Check for worn main bearings.
  8. Check for loose connecting rod nuts.
  9. Check for low oil pressure.
  10. Check for worn crankshaft bearing.
  11. Check for worn crankshaft journal.
  12. Check for loose bearing cap bolts.
  13. Check for excessive crankshaft thrust play.

ENGINE RUNS TOO COOL

  1. Thermostat stuck open.
  2. Cooling fan runs continuously.

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.

Intermittent Simulation

To reproduce the conditions creating an intermittent fault, use the following methods

  1. Lightly vibrate component.
  2. Heat component.
  3. Wiggle or bend wiring harness.
  4. Spray component with water mist.
  5. Remove/apply vacuum source.

Monitor circuit/component voltage or resistance while simulating intermittent. If engine is running, monitor for self-diagnostic codes. Use test results to identify a faulty component or circuit.

More articles — Engine Performance