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Engine Controls - Tests W/o Codes - Except Gs-R Acura Integra III

Testing & Diagnostics ~1137 words

INTRODUCTION

Before diagnosing symptoms or intermittent faults, perform Basic Diagnostic Procedures in the BASIC TESTING - EXCEPT GS-R article and Self-Diagnostic Tests in the TESTS W/CODES - EXCEPT GS-R article. Use this article to diagnose driveability problems existing when a hard fault code is not present. The items listed in this article will not cause MIL to come on or store codes in PCM memory.

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

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

Use intermittent test procedures to locate driveability problems that do not occur when 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.

Note. For test procedures, see: SYSTEM/COMPONENT TESTS - EXCEPT GS-R article. For specifications, see ADJUSTMENTS - EXCEPT GS-R or SPECIFICATIONS - EXCEPT GS-R article.

SYMPTOM DIAGNOSIS

Symptom checks cannot be used properly unless the problem occurs while the vehicle is being tested. To reduce diagnostic time, ensure Basic Diagnostic Procedures in BASIC TESTING - EXCEPT GS-R article and Self-Diagnostic Tests in the TESTS W/CODES - EXCEPT GS-R article were performed before diagnosing a symptom. Recommended system and component checks may not apply to all vehicles. Trouble shoot symptom probable causes in order listed under symptom checks. Symptoms available for diagnosis include the following

  1. Engine Will Not Start
  2. Hard To Start
  3. Cold Fast Idle Too Low
  4. Cold Fast Idle Too High
  5. Idle RPM Fluctuates
  6. Misfire Or Rough Operation
  7. Lack Of Power
  8. Engine Stalls

ENGINE WILL NOT START

Ensure steps for spark and fuel testing in Basic Diagnostic Procedures in the BASIC TESTING - EXCEPT GS-R article have been performed.

  1. Check ignition system. See «BASIC TESTING - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-basic-testing-except-gs-r) article.
  2. Check fuel pressure. See «BASIC TESTING - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-basic-testing-except-gs-r) article.
  3. Check fuel pump (PGM-FI) relay. See procedures in the «BASIC TESTING - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-basic-testing-except-gs-r) article.
  4. Check CKP/TDC/CYP sensor (if equipped). See DTC P0335, P0336, P1336, P1337, P1361, P1362, P1366, P1367, P1381 or P1382 the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  5. Check for contaminated fuel.
  6. Check A/T gear position signal. See procedures in the «SYSTEM/COMPONENT TESTS - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-systemcomponent-tests-except-gs-r) article.
  7. Test PCM power and ground circuits. See MALFUNCTION INDICATOR LIGHT (MIL) in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  8. Other possible causes are engine compression, intake air system leakage, engine locked up, timing belt, starting system, overheating and battery.

HARD TO START

  1. Check fuel pressure. See «BASIC TESTING - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-basic-testing-except-gs-r) article.
  2. Check ignition system. See «BASIC TESTING - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-basic-testing-except-gs-r) article.
  3. Check MAP or MAF sensor (as equipped). See DTC P0101, P0106 or P0107 in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  4. Check air cleaner.
  5. Check BARO sensor. See DTC P1106, P1107 or P1108 in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  6. Check EVAP control system.
  7. Check for contaminated fuel.

COLD FAST IDLE TOO LOW

  1. Check Idle Air Control (IAC) valve. See DTC P1508 or P1519 in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  2. Check fast idle thermo valve. See procedures in the «SYSTEM/COMPONENT TESTS - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-systemcomponent-tests-except-gs-r) article.
  3. Check idle speed adjustment. See procedures in the «ADJUSTMENTS - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/adjustments/#engine-controls-adjustments-except-gs-r) article.
  4. Check Intake Air Temperature (IAT) sensor. See DTC P0111, P0112 or P0113 in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  5. Check air cleaner.

COLD FAST IDLE TOO HIGH

  1. Check Idle Air Control (IAC) valve. See DTC P1508 or P1519 in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  2. Check fast idle thermo valve. See procedures in the «SYSTEM/COMPONENT TESTS - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-systemcomponent-tests-except-gs-r) article.
  3. Check idle speed adjustment. See procedures in the «ADJUSTMENTS - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/adjustments/#engine-controls-adjustments-except-gs-r) article.
  4. Check throttle cable and then throttle body for sticking and binding.

IDLE SPEED FLUCTUATES

  1. Check Idle Air Control (IAC) valve. See DTC P1508 or P1519 in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  2. Check fast idle thermo valve. See procedures in the «SYSTEM/COMPONENT TESTS - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-systemcomponent-tests-except-gs-r) article.
  3. Check idle speed adjustment. See procedures in the «ADJUSTMENTS - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/adjustments/#engine-controls-adjustments-except-gs-r) article.
  4. Check throttle cable and then throttle body for sticking and binding.

MISFIRE OR ROUGH OPERATION

See DTCs P0301-P0306 (individual cylinder misfire), or DTC P0300 or P1300 (random misfire) in the TESTS W/CODES - EXCEPT GS-R article.

LACK OF POWER

  1. Check fuel pressure. See «BASIC TESTING - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-basic-testing-except-gs-r) article.
  2. Check throttle cable and then throttle body for sticking and binding.
  3. Check Throttle Position (TP) sensor. See DTC P0122 in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  4. Check Intake Air By-pass (IAB) control system. See «SYSTEM/COMPONENT TESTS - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-systemcomponent-tests-except-gs-r) article.
  5. Check air cleaner.
  6. Check 3-way catalytic converter for restriction.
  7. Check Manifold Absolute Pressure (MAP) sensor (if equipped). See DTC P0106, P0107 or P0108 in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  8. Check for contaminated fuel.

ENGINE STALLS

  1. Check fuel pressure. See «BASIC TESTING - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-basic-testing-except-gs-r) article.
  2. Check ignition system. See «BASIC TESTING - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-basic-testing-except-gs-r) article.
  3. Check Idle Air Control (IAC) valve. See DTC P1508 in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  4. Check MAP or MAF sensor (as equipped). See DTC P0101, P0106, P0107 or P0108 in the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  5. Check for contaminated fuel.
  6. Check idle speed adjustment. See procedures in the «ADJUSTMENTS - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/adjustments/#engine-controls-adjustments-except-gs-r) article.
  7. Check CKP/TDC/CYP sensor (if equipped). See DTC P0335, P0336, P1336, P1337, P1361, P1362, P1366, P1367, P1381 or P1382 the «TESTS W/CODES - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-tests-wcodes-except-gs-r) article.
  8. Check brake switch signal. See procedures in the «SYSTEM/COMPONENT TESTS - EXCEPT GS-R»(/acura/integra/iii-1993-2001/remont/testing-diagnostics/#engine-controls-systemcomponent-tests-except-gs-r) article.

INTERMITTENT PROBLEM DIAGNOSIS

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

If vehicle does not produce a trouble code(s), 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 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 conditions creating an intermittent fault, use following methods

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

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

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