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Engine Controls - Self-Diagnostics: Diagnosis Hyundai Tiburon I рестайлинг

Testing & Diagnostics ~13060 words

DIAGNOSTIC TESTS

Note. For identification of connector terminals referenced in testing procedures, see CONNECTOR IDENTIFICATION in SELF-DIAGNOSTICS - INTRODUCTION article. For wire color and circuit identification, see appropriate wiring diagram in WIRING DIAGRAMS article. When all repairs are completed, clear DTC. See CLEARING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION article. Retest system. If DTC resets, replace ECM. If DTC does not reset, system is okay.

Note. When DTC P0326: KNOCK SENSOR (KS) RANGE is set, Malfunction Indicator Light (MIL) will not illuminate. MIL will illuminate when any other DTC is set. MIL will also blink when any MISFIRE DETECTED DTC is set.

Test Procedures

  1. Connect scan tool to data link connector. Turn ignition on and verify DTC P0102 or P0103 is set. If either DTC is set, go to next step. If neither DTC is set, problem is intermittent. See «INTERMITTENTS»(ref-3137-S06192138232000041800000) in TROUBLE SHOOTING - NO CODES article.
  2. Start engine and allow to idle. Monitor MAF sensor signal using scan tool. Signal should be 3.7 grams per second at idle and 10.0-13.0 grams per second at 3000 RPM. If sensor signal value is as specified, go to next step. If sensor signal value is either less than or greater than specified, go to step 4 . If signal varies, sometimes greater and sometimes less than specified, ensure there are no airflow restrictions to MAF sensor. Remove leaves or other debris from intake. Ensure sensor terminals are clean and tight. When repairs are completed, clear DTCs and verify MAF sensor operation.
  3. If MAF sensor signal is as specified and DTC P0102 or P0103 are set, problem is intermittent or code was not cleared after previous repairs. Ensure MAF sensor and ECM connector terminals are clean and tight. When repairs are completed, clear DTCs and verify MAF sensor operation.
  4. Turn ignition off. Disconnect MAF sensor 4-pin connector. Turn ignition on. Measure voltage between ground and sensor harness connector terminal No. 3 (Red/White wire). If battery voltage is present, go to next step. If battery voltage is not present, repair open in Red/White wire between MAF sensor and engine control relay connector terminal No. 1. When repairs are completed, clear DTCs and verify MAF sensor operation.
  5. Turn ignition off. Measure resistance between ground and MAF sensor harness connector terminal No. 1 (Black wire). If resistance is one ohm or less than, go to next step. If resistance is more than one ohm, repair open in Black wire between MAF sensor and ground connection located behind left kick panel. When repairs are completed, clear DTCs and verify MAF sensor operation.
  6. Turn ignition off. Disconnect ECM 88-pin harness connector. Check for continuity between ground and MAF sensor harness connector terminal No. 4 (Pink wire). If continuity is not present, go to next step. If continuity is present, repair short to ground in Pink wire between MAF sensor and ECM 88-pin connector terminal No. 41. When repairs are completed, clear DTCs and verify MAF sensor operation.
  7. Turn ignition off. Disconnect ECM 88-pin harness connector. Using a jumper wire, ground MAF sensor harness connector terminal No. 4 (Pink wire). Measure resistance between ground and ECM harness connector terminal No. 41. If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in Pink wire between MAF sensor and ECM. When repairs are completed, clear DTCs and verify MAF sensor operation.
  8. Turn ignition off. Disconnect MAF sensor connector and ECM 88-pin connector. Using a jumper wire, ground MAF sensor harness connector terminal No. 2 (Brown wire on Elantra; Tan wire on Tiburon). Measure resistance between ground and ECM harness connector terminal No. 14. If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in circuit between MAF sensor and ECM. When repairs are completed, clear DTCs and verify MAF sensor operation.
  9. Ensure ECM connector terminals are okay. If connector terminals are okay, replace MAF sensor with a known-good component. Reconnect MAF sensor and ECM connectors. Clear DTCs and verify MAF sensor operation. If problem still exists, replace ECM. When repairs are completed, clear DTCs and verify MAF sensor operation.

Note. It is recommended that vehicle cool down overnight before starting IAT sensor test procedure.

  1. Connect scan tool to data link connector. Turn ignition on and verify DTC P0112 or P0113 is set. If either DTC is set, go to next step. If neither DTC is set, problem is intermittent. See «INTERMITTENTS»(ref-3137-S06192138232000041800000) in TROUBLE SHOOTING - NO CODES article.
  2. Ensure engine is cooled to ambient air temperature. Measure ambient air temperature and turn ignition on. Using scan tool, read IAT sensor temperature. If IAT sensor temperature and ambient air temperature are not about the same, go to next step. If IAT sensor temperature and ambient air temperature are about the same, no problem is indicated at this time. Problem is intermittent or was repaired and DTCs were not cleared. Clear DTCs and ensure IAT sensor is operating properly.
  3. Turn ignition off. Disconnect IAT 2-pin harness connector. Turn ignition on. Measure voltage between ground and IAT connector terminal No. 1 (Pink wire on Elantra; Blue/Black wire on Tiburon). If DTC P0112 is set and zero volts are present, go to next step. If DTC P0112 is set and 4.5-5.0 volts are present, go to step 5 . If DTC P0113 is set and zero volts are present, go to step 6 . If DTC P0113 is set and 4.5-5.0 volts are present, replace IAT sensor. When repairs are completed, clear DTCs and verify MAF sensor operation.
  4. Turn ignition off. Disconnect ECM 88-pin harness connector. Using a jumper wire, connect IAT harness connector terminal No. 1 (Green/Black wire on Elantra; Pink/Black wire on Tiburon) to ground. Measure resistance between ground and ECM connector terminal No. 77. If resistance is one ohm or less, remove jumper wire and go to next step. If resistance is more than one ohm, repair open in circuit between IAT sensor and ECM. When repairs are completed, clear DTCs and verify IAT operation.
  5. Turn ignition off. Disconnect IAT harness connector and ECM 88-pin harness connector. Using a jumper wire, ground IAT harness connector terminal No. 2 (Pink wire on Elantra; White/Black wire on Tiburon). Measure resistance between ground and ECM connector terminal No. 71. If resistance is more than one ohm, repair open between IAT and ECM. If resistance is one ohm or less, ensure ECM connector terminals are clean and tight. If connector terminals are okay, replace IAT sensor with a known-good component. Clear DTCs and verify IAT sensor operation. If problem still exists, replace ECM. When repairs are completed, clear DTCs and verify IAT operation.
  6. Turn ignition off. Disconnect IAT harness connector and ECM 88-pin harness connector. Check for continuity between ground and IAT sensor connector terminal No. 1 (Green/Black wire on Elantra; Pink/Black wire on Tiburon). If continuity does not exist, ensure ECM connector terminals are clean and tight. If connector terminals are okay, replace ECM. If continuity exists, repair short to ground in circuit between IAT sensor and ECM connectors. When repairs are completed, clear DTCs and verify IAT operation.
  1. Turn ignition on. Connect scan tool to data link connector and check for DTCs. If DTC P0116 is set, go to next step. If P0117 is set, go to step 4 . If P0118 is set, go to step 8 . If only P0116 is set, verify ECM connector is clean and tight. If ECM connector is okay, clear DTCs and verify ECT sensor is operating properly. Go to next step. If ECT sensor is okay and DTC resets, replace ECM. When repairs are completed, clear DTCs and verify ECT sensor operation.
  2. Turn ignition off. Remove ECT sensor from intake manifold. Immerse sensing portion of ETC sensor in water and slowly heat water. Measure sensor resistance as water temperature increases. See «ECT SENSOR RESISTANCE & OUTPUT VOLTAGE SPECIFICATIONS»(ref-3861-S05702657402000051700000) table. If resistance is as specified, go to next step. If resistance deviates greatly from the standard value, replace ECT sensor with a known-good component. When repairs are completed, clear DTCs and verify ECT sensor operation. ECT SENSOR RESISTANCE & OUTPUT VOLTAGE SPECIFICATIONS Temperature °F (°C) Ohms Output Voltage 32 (0) 5180-6600 4.05 68 (20) 2270-2730 3.44 104 (40) 1059-1281 2.72 140 (60) 538-650 N/A 176 (80) 298-322 1.25 194 (90) 219-243 N/A
  3. Reconnect ECT sensor connector. Using a voltmeter, backprobe ECT harness connector. Turn ignition on. Measure voltage at different temperatures between ground and ECT connector terminal No. 1 (Pink wire on Elantra; Blue/Black wire on Tiburon). See «ECT SENSOR RESISTANCE & OUTPUT VOLTAGE SPECIFICATIONS»(ref-3861-S05702657402000051700000) table. If voltage is not as specified, replace ECT sensor. Clear DTCs and ensure ECT sensor is operating properly.
  4. Turn ignition on. Using scan tool, verify DTC P0117 is set. Start engine and allow to idle at normal operating temperature. Using scan tool, check ECT sensor temperature. Temperature should be 170-190°F (77-88°C). If ECT sensor temperature is less than specified, go to next step. If ECT sensor temperature is as specified, no problem is indicated at this time. Problem is intermittent or was repaired and DTCs were not cleared. Clear DTCs and ensure ECT sensor is operating properly.
  5. Turn ignition off. Disconnect ECT sensor connector. Turn ignition on. Measure voltage between ECT sensor harness connector terminals No. 1 (Pink wire on Elantra; Blue/Black wire on Tiburon) and No. 2 (Yellow/Black wire on Elantra; Yellow/White wire on Tiburon). Voltage should be 4.5-5.0 volts. If voltage is less than specified, go to next step. If voltage is as specified, replace ECT sensor. When repairs are completed, clear DTCs and ensure ECT sensor is operating properly.
  6. Turn ignition off. Disconnect ECM 88-pin harness connector. Using a jumper wire, ground ECT sensor harness connector terminal No. 2 (Yellow/Black wire on Elantra; Yellow/White wire on Tiburon). Measure resistance between ground and ECM harness connector terminal No. 78 (Yellow/Black wire on Elantra; Yellow/White wire on Tiburon). Resistance should be one ohm or less. If resistance is as specified, remove jumper wire and go to next step. If resistance is not as specified, repair open in circuit between ECT and ECM. When repairs are completed, clear DTCs and ensure ECT sensor is operating properly.
  7. ECT sensor and ECM connectors should still be disconnected. Using a jumper wire, ground ECT sensor harness connector terminal No. 1 (Pink wire on Elantra; Blue/Black wire on Tiburon). Measure resistance between ground and ECM 88-pin connector terminal No. 71 (Pink wire on Elantra; White/Black wire on Tiburon). Resistance should be one ohm or less. If resistance is not as specified, repair open in circuit between ECT and ECM. If resistance is as specified, ensure ECM connector terminals are clean and tight. If connector terminals are okay, replace ECT sensor with a known-good component. If problem still exists, replace ECM. When repairs are completed, clear DTCs and verify ECT sensor operation.
  8. Turn ignition on. Using scan tool, verify that DTC P0118 is set. Start engine and allow to idle at normal operating temperature. Using scan tool, check ECT sensor temperature. Temperature should be 170-190°F (77-88°C). If ECT temperature is more than specified, go to next step. If ECT temperature is as specified, no problem is indicated at this time. Problem is intermittent or was repaired and DTCs were not cleared. Clear DTCs and ensure ECT sensor is operating properly.
  9. Turn ignition off. Disconnect ECT sensor connector. Turn ignition on. Using scan tool, check ECT sensor temperature. Temperature should be -40°F (-40°C). If ECT temperature is not as specified, go to next step. If ECT temperature is as specified, replace ECT sensor. When repairs are completed, clear DTCs and verify ECT sensor operation.
  10. Turn ignition off. Disconnect ECM 88-pin connector. Check for continuity between ground and ECT sensor harness connector terminal No. 2 (Yellow/Black wire on Elantra; Yellow/White wire on Tiburon). If continuity exists, repair short to ground in circuit between ECT and ECM. If continuity does not exist, ensure ECM connector terminals are clean and tight. If connector terminals are okay, replace ECT sensor with a known-good component. If problem still exists, replace ECM. When repairs are completed, clear DTCs and verify ECT sensor operation.
  1. Turn ignition on. Connect scan tool to data link connector and check for DTCs. If DTC P0121 is set, go to «DTC P0102 OR P0103: MASS AIRFLOW (MAF) SENSOR»(ref-3861-S20478787682000051700000) . If DTC P0122 or DTC P0123 are set, go to next step.
  2. Start engine and allow to idle at normal operating temperature. Using scan tool, monitor signal of Throttle Position (TP) sensor, Mass Airflow (MAF) sensor and engine speed. See «THROTTLE POSITION & MASS AIRFLOW SENSOR OUTPUT SPECIFICATIONS»(ref-3861-S03277348692000051700000) table. If TP sensor and MAF sensor signals are as specified, problem is intermittent or has been repaired and DTCs were not cleared. If TP sensor signal is not as specified, go to next step. If MAF sensor signal is not as specified, check for DTC P0102 or DTC P0103. Perform repairs as necessary. When repairs are completed, clear DTCs and verify sensor operation. THROTTLE POSITION & MASS AIRFLOW SENSOR OUTPUT SPECIFICATIONS Engine RPM TP Sensor Percent Open MAF Sensor Volume Grams/Second Idle 8.6 2.8 2000 11.3 6.3 3000 13.7 9.5 4000 16.0 13.6
  3. Allow engine to idle for at least 15 seconds. Using scan tool, monitor TP sensor output signal with throttle fully released. If TP sensor signal is more than 25 percent, go to next step. If TP sensor signal is less than 6 percent, or is 13-25 percent, go to step 5 . If TP sensor signal is 6-13 percent, problem is intermittent or was repaired and DTCs were not cleared. Ensure ECM and TP sensor connectors are clean and tight. When repairs are completed, clear DTCs and verify TP sensor operation.
  4. Turn ignition off. Disconnect TP sensor 3-pin connector. Turn ignition on. Measure voltage between ground and TP sensor harness connector terminal No. 1 (White/Black wire). If approximately 5.0 volts is present, replace TP sensor. If approximately zero volts is present, repair short to ground or open in White/Black wire between TP sensor and ECM 88-pin connector terminal No. 59. If more than 5.0 volts is present, repair short to battery voltage in White/Black wire between TP sensor and ECM. When repairs are completed, clear DTCs and verify TP sensor operation.
  5. Allow engine to idle with throttle fully released. Attempt to adjust TP sensor until output signal voltage is 6-13 percent (0.25-0.80 volt). If TP sensor cannot be adjusted as specified, go to next step. If TP sensor can be adjusted as specified, monitor TP sensor output signal. Snap throttle to Wide Open Throttle (WOT) position and release. If TP sensor output signal reaches approximately 95 percent, problem was misadjusted TP sensor. If TP sensor signal does not reach approximately 95 percent, replace TP sensor. When repairs are completed, clear DTCs and verify TP sensor operation.
  6. Turn ignition off. Disconnect TP sensor 3-pin connector. Turn ignition on. Measure voltage between ground and TP sensor harness connector terminal No. 1 (White/Black wire). If approximately 5.0 volts is present, go to next step. If approximately 5.0 volts is not present, repair open in (White/Black wire) between TP sensor and ECM 88-pin connector terminal No. 59. When repairs are completed, clear DTCs and verify TP sensor operation.
  7. Turn ignition on, with engine off. Disconnect TP sensor 3-pin connector. Measure resistance between ground and TP sensor connector terminal No. 2 (Pink wire on Elantra; White/Black wire on Tiburon). If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in circuit between TP sensor and ECM connector terminal No. 71 (Pink wire on Elantra; White/Black wire on Tiburon). When repairs are completed, clear DTCs and verify TP sensor operation.
  8. Ignition is on and TP sensor 3-pin connector still disconnected. Connect a fused jumper wire between TP sensor harness connector terminals No. 1 (White wire) and No. 3 (Light Green wire on Elantra; Light Blue wire on Tiburon). Using scan tool, check TP sensor output signal. If TP sensor signal is less than 90 percent, go to next step. If TP sensor signal is more than 90 percent, replace TP sensor. When repairs are completed, clear DTCs and verify TP sensor operation.
  9. Ignition is on, TP sensor 3-pin connector is still disconnected and fused jumper wire is still connected. Backprobe ECM 88-pin connector and measure voltage between ground and ECM connector terminal No. 73 (Light Green wire on Elantra; Light Blue wire on Tiburon). If 5.0 volts is present, ensure ECM connector terminals are clean and tight. If connector is okay, replace ECM. If 5.0 volts is not present, repair open or short to ground in circuit between ECM and TP sensor connector terminal No. 1. When repairs are completed, clear DTCs and verify TP sensor operation.
  1. Turn ignition on. Connect scan tool to data link connector and check for DTCs. Verify DTC P0130 or P0136 is set. If only DTC P0130 or P0136 is set, go to next step. If any other DTC is set, repair that DTC first. See «DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION»(ref-3861-S33683877712002092300000) . If DTCs P0130 and P0136 are not present, problem is intermittent. See «INTERMITTENTS»(ref-3137-S06192138232000041800000) in TROUBLE SHOOTING - NO CODES article.
  2. Start engine and allow to idle at normal operating temperature. Using scan tool, monitor suspect HO2S output voltage at various engine speeds. If voltage is 5.0 volts or 12.0 volts, go to next step. If voltage is approximately 450 mV (0.45 volts) and does not vary, go to step 4 . If voltage is zero volts, go to step 6 . If voltage varies and is always less than 500 mV (0.5 volt - lean), go to step 7 . If voltage varies and is always more than 500 mV (0.5 volt - rich), go to step 8 . If voltage varies between 0 and 900 mV (0-0.9 volt), go to step 9 .
  3. If DTC P0130 is set and voltage is either 5.0 volts or 12 volts, repair short to voltage in circuit between front HO2S connector terminal No. 1 and ECM 88-pin connector terminal No. 12. If DTC P0136 is set and voltage is either 5.0 volts or 12.0 volts, repair short to voltage in Green wire between rear HO2S connector terminal No. 1 and ECM 88-pin connector terminal No. 39. When repairs are completed, clear DTCs and verify HO2S operation.
  4. If voltage is approximately 450 mV (0.45 volt) and does not vary, allow engine to idle. Backprobe between suspect HO2S connector terminals No. 1 and 2, and measure voltage. If voltage changes from less than 500 mV (0.5 volt) to more than 500 mV (0.5 volt), go to next step. If voltage does not change as specified, replace suspect HO2S. When repairs are completed, clear DTCs and verify HO2S operation.
  5. Turn ignition off. Disconnect front HO2S 4-pin connector if DTC P0130 is set, or rear HO2S 4-pin connector if DTC P0136 is set. Disconnect ECM 88-pin connector. Using a jumper wire, connect suspect HO2S harness connector terminal No. 1 to ground. Measure resistance between ground and ECM connector terminal No. 12 for front HO2S or terminal No. 39 for rear HO2S. If resistance is one ohm or less, ensure ECM connector terminals are clean and tight. If ECM connector is okay, replace suspect HO2S. Clear DTCs and verify HO2S operation. If problem is still present, replace ECM. If resistance is more than one ohm, repair open or cause of high resistance in suspect circuit. When repairs are completed, clear DTCs and verify HO2S operation.
  6. Disconnect suspect HO2S 4-pin connector and read sensor voltage on scan tool. If voltage is approximately 450 mV (.45 volt), replace suspect HO2S. If voltage is not approximately 450 mV (0.45 volt) for front HO2S, repair short to ground in White wire between HO2S connector terminal No. 1 and ECM connector terminal No. 12. If voltage is not approximately 450 mV (0.45 volt) for rear HO2S, repair short to ground in Green/White wire between HO2S connector terminal No. 1 and ECM connector terminal No. 39. When repairs are completed, clear DTCs and verify HO2S operation.
  7. If voltage varies and is always less than 500 mV (0.5 volt - lean), check air inlet downstream of Mass Airflow (MAF) sensor for leaks or damage. Check exhaust manifold for cracks or leaks. If leaks or damage are found, replace HO2S and perform repairs as necessary. If no leaks or damage is found, go to next step. When repairs are completed, clear DTCs and verify HO2S operation.
  8. Perform fuel pressure inspection. See «FUEL PRESSURE TEST»(ref-3129-S13673442392000041800000) under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If fuel pressure is within specification and no pressure leak-down is detected, go to next step. If fuel pressure is not as specified, repair fuel system as necessary. When repairs are completed, clear DTCs and verify HO2S operation.
  9. Turn ignition off. Disconnect ignition coil connector. While cranking engine, measure voltage drop across negative battery cable and cable attachment located on engine. If voltage drop is less than 500mV (0.5 volt), go to next step. If voltage drop is more than 500 mV (0.5 volt), replace negative battery cable. When repairs are completed, clear DTCs and verify HO2S operation.
  10. Disconnect negative battery cable. Measure resistance between generator housing and engine ground connection. If resistance is one ohm or less, go to next step. If resistance is more than one ohm, clean mating surfaces of generator housing and engine. When repairs are completed, clear DTCs and verify HO2S operation.
  11. If MIL is illuminating intermittently and DTC P0130 or P0136 is set, problem is most likely a poor ground circuit. Clean negative battery terminal and engine ground. In addition, clean mating surfaces of generator housing and engine. If MIL was illuminated and DTC P0130 or P0136 is set, replace suspect HO2S. When repairs are completed, clear DTCs and verify HO2S operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P0131 or P0137 is set. If DTC P0135 or P0141 is set, go to «DTC P0135 OR P0141: HO2S HEATER CIRCUIT MALFUNCTION»(ref-3861-S12146034332000051700000) . If DTC P0135 or P0141 is not set, go to next step.
  2. Start engine and allow to idle at normal operating temperature. Increase engine speed to 4000 RPM. Using scan tool, monitor HO2S voltage. If voltage is zero volts, go to next step. If voltage is constant and approximately 450 mV (0.45 volt), go to step 4 . If voltage varies but stays less than 500 mV (0.5 volt - lean), go to step 6 . If voltage varies between 100 and 900 mV (0.1-0.9 volt), go to step 8 .
  3. Disconnect front HO2S 4-pin connector if DTC P0131 is set, or rear HO2S 4-pin connector if DTC P0137 is set. Read sensor voltage using scan tool. If voltage is approximately 450 mV (0.45 volt), replace suspect HO2S. If DTC P0131 is set and voltage is not 450 mV (0.45 volt), repair short to ground in circuit between front HO2S connector terminal No. 1 (White wire on Elantra; Green/White wire on Tiburon) and ECM connector terminal No. 12. If DTC P0137 is set and voltage is not 450 mV (0.45 volt), repair short to ground in circuit between front HO2S connector terminal No. 1 (Black wire on Elantra; Green/White wire on Tiburon) and ECM connector terminal No. 39. When repairs are completed, clear DTCs and verify HO2S operation.
  4. If voltage is approximately 450 mV (0.45 volt) and does not vary, allow engine to idle. Backprobe between suspect HO2S connector terminals No. 1 and 2, and measure voltage. If voltage changes between less than 500 mV (0.5 volt) and more than 500 mV (0.5 volt), go to next step. If voltage does not change, replace suspect HO2S. When repairs are completed, clear DTCs and verify HO2S operation.
  5. Turn ignition off. Disconnect front HO2S 4-pin connector if DTC P0131 is set, or rear HO2S 4-pin connector if DTC P0137 is set. Disconnect ECM 88-pin connector. Using a jumper wire, connect suspect HO2S harness connector terminal No. 1 to ground. Measure resistance between ground and ECM connector terminal No. 12 for front HO2S or terminal No. 39 for rear HO2S. If resistance is one ohm or less, ensure ECM connector terminals are clean and tight. If ECM connector is okay, replace ECM. If resistance is more than one ohm repair open or cause of high resistance in suspect circuit. When repairs are completed, clear DTCs and verify HO2S operation.
  6. If voltage varies and is less than 500 mV (0.5 volt - lean), check air inlet downstream of Mass Airflow (MAF) sensor for leaks or damage. Check exhaust manifold for cracks or leaks. If leaks or damage is found, perform repairs as necessary. If no leaks or damage is found, go to next step. When repairs are completed, clear DTCs and verify HO2S operation.
  7. Perform fuel pressure inspection. See «FUEL PRESSURE TEST»(ref-3129-S13673442392000041800000) under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If fuel pressure is within specification and no pressure leak-down is detected, go to next step. If fuel pressure is not as specified, repair fuel system as necessary. When repairs are completed, clear DTCs and verify HO2S operation.
  8. Turn ignition off. Disconnect ignition coil connector. Connect voltmeter between negative battery cable and cable attachment located on engine. Measure voltage drop across negative battery cable while cranking engine. If voltage drop is less than 0.5 volt, go to next step. If voltage drop is more than 0.5 volt, replace negative battery cable. When repairs are completed, clear DTCs and verify HO2S operation.
  9. Disconnect negative battery cable and measure resistance between generator housing and engine ground point. If resistance is one ohm or less, go to next step. If resistance is more than one ohm, clean mating surfaces of generator housing and engine. When repairs are completed, clear DTCs and verify HO2S operation.
  10. If MIL is illuminating intermittently and DTC P0131 or P0137 is set, problem is most likely a poor ground circuit. Clean negative battery terminal and engine ground. In addition, clean mating surfaces of generator housing and engine. If MIL was illuminated and DTC P0131 or P0137 is set, replace suspect HO2S. When repairs are completed, clear DTCs and verify HO2S operation.
  1. Turn ignition on and connect scan tool to data link connector. Verify DTC P0132 or P0138 is set. If DTC P0135 or P0141 is set, go to «DTC P0135 OR P0141: HO2S HEATER CIRCUIT MALFUNCTION»(ref-3861-S12146034332000051700000) . If DTC P0135 or P0141 is not set, go to next step.
  2. Start engine and allow to idle at normal operating temperature. Increase engine speed to 4000 RPM. Using scan tool, monitor HO2S voltage. If voltage is constant and approximately 450 mV (0.45 volt), go to next step. If voltage varies but stays more than 500 mV (0.5 volt - rich), go to step 5 . If voltage varies between 100 and 900 mV (0.1-0.9 volt), go to step 6 . If voltage is constant and approximately 5.0 volts or 12.0 volts, repair short to voltage in wiring harness. When repairs are completed, clear DTCs and verify HO2S operation.
  3. While engine is operating, backprobe between suspect HO2S 4-pin connector terminals No. 1 and 2 and measure voltage. If voltage changes between less than 500 mV (0.5 volt) and more than 500 mV (0.5 volt), go to next step. If voltage does not change, replace suspect HO2S. When repairs are completed, clear DTCs and verify HO2S operation.
  4. Turn ignition off. Disconnect front HO2S 4-pin connector if DTC P0132 is set, or rear HO2S 4-pin connector if DTC P0138 is set. Disconnect ECM 88-pin connector. Using a jumper wire, connect suspect HO2S harness connector terminal No. 1 to ground. Measure resistance between ground and ECM connector terminal No. 12 for front HO2S, or terminal No. 39 for rear HO2S. If resistance is one ohm or less, ensure ECM connector terminals are clean and tight. If ECM connector is okay, replace suspect HO2S. If problem persists, replace ECM. If resistance is more than one ohm, repair open or cause of high resistance in suspect circuit. When repairs are completed, clear DTCs and verify HO2S operation.
  5. Perform fuel pressure inspection. See «FUEL PRESSURE TEST»(ref-3129-S13673442392000041800000) under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If fuel pressure is within specification and no pressure leak-down is detected, go to next step. If fuel pressure is not as specified, repair fuel system as necessary. When repairs are completed, clear DTCs and verify HO2S operation.
  6. Turn ignition off. Disconnect ignition coil connector. Connect voltmeter between negative battery cable and cable attachment located on engine. Measure voltage drop across negative battery cable while cranking engine. If voltage drop is less than 0.5 volt, go to next step. If voltage drop is more than 0.5 volt, replace negative battery cable. When repairs are completed, clear DTCs and verify HO2S operation.
  7. Disconnect negative battery cable and measure resistance between generator housing and engine ground point. If resistance is one ohm or less, go to next step. If resistance is more than one ohm, clean mating surfaces of generator housing and engine. When repairs are completed, clear DTCs and verify HO2S operation.
  8. If MIL is illuminating intermittently and DTC P0132 or P0138 is set, problem is most likely a poor ground circuit. Clean negative battery terminal and engine ground. In addition, clean mating surfaces of generator housing and engine. If MIL was illuminated and DTC P0132 or P0138 is set, replace suspect HO2S. When repairs are completed, clear DTCs and verify HO2S operation.
  1. Turn ignition on and connect scan tool to data link connector. Verify DTC P0133 or P0134 is set. If DTC P0135 is also set, repair DTC P0135 first. See «DTC P0135 OR P0141: HO2S HEATER CIRCUIT MALFUNCTION»(ref-3861-S12146034332000051700000) .
  2. Start engine and allow to idle at normal operating temperature. Increase engine speed to 4000 RPM. Using scan tool, monitor HO2S voltage. If voltage is zero volts, go to next step. If voltage is constant and approximately 450 mV (0.45 volt), go to step 4 . If voltage varies, but stays less than 500 mV (0.5 volt - lean), go to step 6 . If voltage varies, but stays more than 500 mV (0.5 volt - rich), go to step 7 . If voltage varies between 100 and 900 mV (0.1-0.9 volt), go to step 8 . If voltage is constant and approximately 5.0 volts or 12.0 volts, repair short to voltage in wiring harness. When repairs are completed, clear DTCs and verify HO2S operation.
  3. Disconnect front HO2S 4-pin connector. If DTC P0133 is set, voltage displayed on scan tool should be approximately 450 mV (0.45 volt). If DTC P0134 is set, voltage displayed on scan tool should be approximately 500 mV (0.5 volt). If voltage is as specified, replace suspect HO2S. If voltage is not as specified, repair short to ground in Yellow wire between HO2S connector terminal No. 1 and ECM 88-pin connector terminal No. 12. When repairs are completed, clear DTCs and verify HO2S operation.
  4. While engine is operating, backprobe between HO2S 4-pin connector terminals No. 1 and 2, and measure voltage. If voltage changes from less than 500 mV (0.5 volt) to more than 500 mV (0.5 volt), go to next step. If voltage does not change, replace HO2S. When repairs are completed, clear DTCs and verify HO2S operation.
  5. Turn ignition off. Disconnect front HO2S 4-pin connector and ECM 88-pin connector. Using a jumper wire, connect HO2S connector terminal No. 1 to ground. Measure resistance between ground and ECM connector terminal No. 12. If resistance is one ohm or less, ensure ECM connector terminals are clean and tight. If ECM connector are okay, replace front HO2S. Clear DTCs and verify HO2S operation. If problem persists, replace ECM. If resistance is more than one ohm, repair open or cause of high resistance in circuit between HO2S and ECM. When repairs are completed, clear DTCs and verify HO2S operation.
  6. If voltage varies and is always less than 500 mV (0.5 volt - lean), check air inlet downstream of Mass Airflow (MAF) sensor for leaks or damage. Check exhaust manifold for cracks or leaks. If any leaks or damage is found perform repairs as necessary. If no leaks or damage is found, go to next step.
  7. Perform fuel pressure inspection. See «FUEL PRESSURE TEST»(ref-3129-S13673442392000041800000) under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If fuel pressure is within specification and no pressure leak-down is detected, go to next step. If fuel pressure is not as specified, repair fuel system as necessary. When repairs are completed, clear DTCs and verify HO2S operation.
  8. Turn ignition off. Disconnect ignition coil connector. Connect voltmeter between negative battery cable and cable attachment located on engine. Measure voltage drop across negative battery cable while cranking engine. If voltage drop is less than 0.5 volt, go to next step. If voltage drop is more than 0.5 volt, replace negative battery cable. When repairs are completed, clear DTCs and verify HO2S operation.
  9. Disconnect negative battery cable and measure resistance between generator housing and engine ground point. If resistance is one ohm or less, go to next step. If resistance is more than one ohm, clean mating surfaces of generator housing and engine. When repairs are completed, clear DTCs and verify HO2S operation.
  10. If MIL is illuminating intermittently and DTC P0133 is set, problem is most likely a poor ground circuit. Clean negative battery terminal and engine ground. In addition, clean mating surfaces of generator housing and engine. If MIL was illuminated and DTC P0133 or P0134 is set, replace front HO2S. When repairs are completed, clear DTCs and verify HO2S operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P0135 or P0141 is set. If DTC P0135 is set, disconnect front HO2S 4-pin connector. If DTC P0141 is set, disconnect rear HO2S 4-pin connector. Start engine and measure voltage between ground and HO2S connector terminal No. 4. If voltage is 12-16 volts, go to next step. If voltage is not 12-16 volts, repair open or short to ground in circuit between HO2S connector and fuel pump control relay connector. When repairs are completed, clear DTCs and verify HO2S operation.
  2. Turn ignition off. Disconnect suspect HO2S 4-pin connector and ECM 88-pin connector. Using a jumper wire, connect HO2S connector terminal No. 3 to ground. Measure resistance between ground and ECM harness connector terminal No. 37 (Orange/Black wire on Elantra; Green/White wire on Tiburon), if DTC P0135 is set, or terminal No. 30 (Red wire on Elantra; Red/White wire on Tiburon) if DTC P0141 is set. If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open or short to ground in circuit between ECM harness connector and HO2S harness connector. When repairs are completed, clear DTCs and verify HO2S operation.
  3. Turn ignition off. Disconnect suspect HO2S connector. Check for continuity between ground and HO2S connector terminal No. 3. If continuity does not exist, go to next step. If continuity exists, repair short to ground or another circuit between HO2S connector terminal No. 3 and ECM connector terminal No. 37 if DTC P0135 is set or terminal No. 30 if DTC P0141 is set. When repairs are completed, clear DTCs and verify HO2S operation.
  4. Turn ignition off. Disconnect suspect HO2S connector. Measure resistance between HO2S terminals No. 3 and No. 4. If resistance is 3-5 ohms, ensure ECM connector terminals are clean and tight. If ECM connector terminals are clean and tight replace suspect HO2S with a known-good component. Clear DTCs and verify HO2S operation. If problem persists, replace ECM. If resistance is not 3-5 ohms, replace HO2S. When repairs are completed, clear DTCs and verify HO2S operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P0201, P0202, P0203 or P0204 is set. Start engine and allow to idle at normal operating temperature. Perform an engine RPM drop test by disconnecting and reconnecting each fuel injector one at a time. Note drop in engine RPM as each cylinder is disabled. If RPM drop is not the same for each cylinder, go to next step. If RPM drop is the same for each cylinder, problem is intermittent or was repaired and DTC was not cleared. Clear DTC and verify fuel injector operation.
  2. Turn ignition off. Disconnect suspect fuel injector connector. Turn ignition on. Measure voltage between ground and fuel injector harness connector terminal No. 1 (Red/White wire). If battery voltage is present, go to next step. If battery voltage is not present, repair open in circuit between engine control relay connector terminal No. 1 (Red/White wire) and fuel injector. When repairs are completed, clear DTC and verify fuel injector operation.
  3. Turn ignition off. Disconnect suspect fuel injector connector and ECM 88-pin connector. Using a jumper wire, connect fuel injector connector terminal No. 2 to ground. Measure resistance between ground and ECM connector terminal No. 3 (Green wire) for DTC P0201, terminal No. 32 (Brown/White wire) for DTC P0202, terminal No. 31 (Blue/White wire) for DTC P0203, or terminal No. 4 (Pink/White wire) for DTC P0204. If resistance for suspect circuit is one ohm or less, go to next step. If resistance is more than one ohm, repair open in suspect circuit between fuel injector connector and ECM connector. When repairs are completed, clear DTC and verify fuel injector operation.
  4. Turn ignition off. Disconnect suspect fuel injector connector and ECM 88-pin connector. Check for continuity between ground and fuel injector harness connector terminal No. 2. If continuity does not exist, go to next step. If continuity exists, repair short to ground in suspect circuit. When repairs are completed, clear DTC and verify fuel injector operation.
  5. Turn ignition off. Disconnect suspect fuel injector. Measure resistance between fuel injector terminals No. 1 and 2. If resistance is approximately 15.9 ohms at 68°F (20°C), ensure ECM connector terminals are clean and tight. If ECM connector terminals are okay, replace suspect fuel injector with a known good component. Clear DTC and verify fuel injector operation. If problem persists, replace ECM. If resistance is not 15.9 ohms at 68°F (20°C), replace suspect fuel injector. When repairs are completed, clear DTC and verify fuel injector operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P0300 is set. If DTC P0300 is the only DTC set and fuel is at least 87 octane, go to next step. If other DTCs are set, repair other DTCs first. If fuel octane is less than 87, refuel with 87 or higher octane fuel and retest, clear DTC and verify operation.
  2. Turn ignition off. Disconnect ignition coil 3-pin connector. Turn ignition on. Measure voltage between ground and ignition coil connector terminal No. 1 (Brown wire on Elantra; Black wire on Tiburon). If battery voltage is present, go to next step. If battery voltage is not present, repair open in circuit between ignition switch 6-pin connector terminal No. 4 (Black/White wire) and ignition coil connector terminal No. 1. When repairs are completed, clear DTC and verify operation.
  3. Turn ignition off. Disconnect ECM 88-pin connector. Using jumper wires connect ignition coil connector terminals No. 2 (Green wire on Elantra; Brown/Red wire on Tiburon) and No. 3 (White wire on Elantra; Light Blue/Yellow wire on Tiburon) to ground. Measure resistance between ground and ECM harness connector terminals No. 25 (Green wire on Elantra; Brown/Red wire on Tiburon) and No. 52 (White wire on Elantra; Light Blue/Yellow wire on Tiburon). If resistance is one ohm or less, remove jumper wires and go to next step. If resistance is more than one ohm, repair open in suspect circuit between ignition coil and ECM. When repairs are completed, clear DTC and verify operation.
  4. Turn ignition off. Reconnect ECM 88-pin harness connector. Ignition coil 3-pin connector should be disconnected. Turn ignition switch to START position. Measure voltage between ground and ignition coil connector terminals No. 2 (Green wire on Elantra; Brown/Red wire on Tiburon) and No. 3 (White wire on Elantra; Light Blue/Yellow wire on Tiburon). If voltage varies between 0.02-0.2 volt on both circuits, go to next step. If voltage does not vary between 0.02-0.2 volt on either circuit, ensure ECM harness connector terminals are clean and tight. If connector is okay, replace ECM. When repairs are completed, clear DTC and verify operation.
  5. Turn ignition off. Disconnect ignition coil connector and spark plug wires from coil. Measure primary coil resistance between ignition coil terminals No. 1 and 2, and between terminals No. 1 and 3. If primary coil resistance is approximately 0.45-0.55 ohm, go to next step. If primary coil resistance is not approximately 0.45-0.55 ohm, replace ignition coil. When repairs are completed, clear DTC and verify operation.
  6. Measure resistance of secondary coils between ignition coil spark plug connector terminals No. 1 and 4, and between terminals No. 2 and 3. If secondary coil resistance is approximately 10,300-13,900 ohms, go to next step. If secondary coil resistance is not approximately 10,300-13,900 ohms, replace ignition coil. When repairs are completed, clear DTC and verify operation.
  7. Inspect the following components/systems and ensure they are operating properly: Spark plugs and spark plug wires. Clogged, leaking or damaged fuel injectors and wiring. Obstructed airflow meter. Acceleration sensor wiring harness. Canister purge valve. Vacuum hoses and connections. If all components/systems are operating properly, go to next step. Repair or replace components/systems as necessary. When repairs are completed, clear DTC and verify operation.
  8. Perform fuel pressure inspection. See «FUEL PRESSURE TEST»(ref-3129-S13673442392000041800000) under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. If fuel pressure is not as specified, repair fuel system as necessary. If fuel pressure is within specification and no pressure leak-down is detected, check engine oil for proper level and for contamination (fuel or water in oil). If engine oil is okay, ensure ECM connector terminals are clean and tight. If ECM connector is okay, replace ECM. When repairs are completed, clear DTCs and verify operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P0301, P0302, P0303 or P0304 is set. If DTC P0301, P0302, P0303 or P0304 is the only DTC set and fuel is at least 87 octane, go to next step. If DTC P0201, P0202, P0203, P0204 and/or P0300 is also set, repair these DTCs first. If fuel octane is less than 87, refuel with 87 or higher octane fuel and retest, clear DTC and verify operation.
  2. Turn ignition off. Disconnect ignition coil connector and spark plug wires from coil. Measure primary coil resistance between ignition coil terminals No. 1 and 3, and between terminals No. 2 and 3. If primary coil resistance is approximately 0.45-0.55 ohm, go to next step. If primary coil resistance is not approximately 0.45-0.55 ohm, replace ignition coil. When repairs are completed, clear DTC and verify operation.
  3. Measure resistance of secondary coils between ignition coil spark plug connector terminals No. 1 and 4, and between terminals No. 2 and 3. If secondary coil resistance is approximately 10,300-13,900 ohms, go to next step. If secondary coil resistance is not approximately 10,300-13,900 ohms, replace ignition coil. When repairs are completed, clear DTC and verify operation.
  4. Turn ignition off. Inspect spark plugs, plug wires and connections. Inspect condition of acceleration sensor, related wiring and connector. Check for clogged fuel injectors. Perform repairs as necessary. If no problems are found, verify ECM connector terminals are clean and tight. If ECM connector is okay, replace ECM. When repairs are completed, clear DTC and verify operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P0326 is set. Verify fuel is at least 87 octane. If fuel is not at least 87 octane, refuel vehicle with higher octane fuel. Ensure knock sensor is tightened to 12-19 ft. lbs. (16-26 N.m). When repairs are completed, clear DTC and verify operation. If DTC P0326 resets, go to next step.
  2. Turn ignition off. Disconnect knock sensor connector. Measure resistance between knock sensor terminals No. 1 (White wire on Elantra; Blue wire on Tiburon) and No. 2 (Green wire on Elantra; Brown/Black wire on Tiburon). If knock sensor resistance is about 5 megohms at 68°F (20°C), go to next step. If resistance is not about 5 megohms at 68°F (20°C), replace knock sensor. Tighten knock sensor to 12-19 ft. lbs. (16-26 N.m). When repairs are completed, clear DTC and verify operation.
  3. Turn ignition off. Disconnect knock sensor and ECM connectors. Using jumper wires, connect knock sensor harness connector terminals No. 1 (White wire on Elantra; Blue wire on Tiburon) and No. 2 (Green wire on Elantra; Brown/Black wire on Tiburon) to ground. Measure resistance between ground and ECM connector terminals No. 70 (Green wire on Elantra; Brown/Black wire on Tiburon) and No. 71 (Pink wire on Elantra; White/Black wire on Tiburon). If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in suspect wire between knock sensor and ECM. When repairs are completed, clear DTC and verify operation.
  4. Turn ignition off. Disconnect knock sensor and ECM connectors. Check for continuity between ground and knock sensor harness connector terminal No. 2 (Green wire on Elantra; Brown/Black wire on Tiburon). If continuity does not exist, ensure ECM connector terminals are clean and tight. If connector is okay, replace knock sensor with a known-good component, clear DTC and verify operation. If problem persists, replace ECM. If continuity exists, repair short to ground in circuit between knock sensor and ECM connector terminal No. 70 (Green wire on Elantra; Brown/Black wire on Tiburon). When repairs are completed, clear DTC and verify operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P0335 or P0336 is set. Disconnect CKP sensor 3-pin connector. Measure resistance between CKP sensor terminals No. 1 (Yellow wire on Elantra; White/Blue wire on Tiburon) and No. 2 (Brown wire on Elantra; Brown/Black wire on Tiburon). Resistance should be 486-594 ohms at 68°F (20°C). If resistance is as specified, go to next step. If resistance is not as specified, replace CKP sensor. When repairs are completed, clear DTC and verify CKP sensor operation.
  2. Turn ignition off. Disconnect CKP sensor and ECM connectors. Check for continuity between ground and CKP sensor harness connector terminals No. 1 (Yellow wire on Elantra; White/Blue wire on Tiburon) and No. 2 (Brown wire on Elantra; Brown/Black wire on Tiburon). If continuity does not exist, go to next step. If continuity exists, repair short to ground in suspect circuit between CKP and ECM connector terminals No. 16 and No. 43. When repairs are completed, clear DTC and verify CKP sensor operation.
  3. Turn ignition off. Disconnect CKP harness connector. Measure resistance between ground and CKP sensor harness connector terminal No. 3 (Black wire). If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in harness shield to ground connections. When repairs are completed, clear DTC and verify operation.
  4. Turn ignition off. Disconnect CKP sensor and ECM connectors. Using jumper wires, connect CKP sensor harness connector terminals No. 1 (Yellow wire on Elantra; White/Blue wire on Tiburon) and No. 2 (Brown wire on Elantra; Brown/Black wire on Tiburon) to ground. Measure resistance between ground and ECM harness connector terminals No. 16 and No. 43. If resistance is one ohm or less, ensure ECM connector terminals are clean and tight. If connector is okay, replace CKP sensor with a known-good component. Clear DTC and verify operation. If problem persists, replace ECM. If resistance is more than one ohm, repair open in suspect circuit between CMP sensor and ECM connector. When repairs are completed, clear DTC and verify operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P0342 or P0343 is set. Backprobe CMP sensor connector and measure voltage between ground and terminal No. 1 (Red wire on Elantra; Pink wire on Tiburon). If battery voltage is present, go to next step. If battery voltage is not present, repair open in circuit between CMP sensor connector terminal No. 1 and engine control relay connector terminal No. 3 (Red wire on Elantra; Pink wire on Tiburon). When repairs are completed, clear DTC and verify sensor operation.
  2. Ensure CMP sensor is connected. Start engine and allow to idle. Increase engine speed to 800-3000 RPM. Backprobe CMP sensor connector and measure voltage between connector terminals No. 2 (Red wire) and No. 3 (Black wire). If voltage varies between zero and 5.0 volts, go to next step. If voltage does not vary between zero and 5.0 volts, replace CMP sensor. When repairs are completed, clear DTC and verify sensor operation.
  3. Turn ignition off. Disconnect CMP sensor and ECM harness connectors. Using a jumper wire, connect CMP sensor connector terminal No. 2 (Red wire) to ground. Measure resistance between ground and ECM connector terminal No. 44 (Red wire). If resistance is one ohm or less, remove jumper wire and go to next step. If resistance is more than one ohm, repair open in circuit between CMP sensor and ECM. When repairs are completed, clear DTC and verify sensor operation.
  4. Turn ignition off. Disconnect CMP sensor and ECM harness connectors. Check for continuity between ground and CMP sensor harness connector terminal No. 2 (Red wire). If continuity does not exist, go to next step. If continuity exists, repair short to ground in circuit between CMP sensor and ECM. When repairs are completed, clear DTC and verify sensor operation.
  5. Turn ignition off. Measure resistance between ground and CMP sensor harness connector terminal No. 1 (Black wire). If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open or poor ground connection in Black wire between CMP and ground connection. When repairs are completed, clear DTC and verify sensor operation.
  6. Inspect CMP sensor for debris or misadjustment. Ensure engine timing is okay. Adjust or replace CMP sensor as necessary. If sensor and engine timing are okay, verify ECM connector terminals are clean and tight. If connector is okay, replace ECM. When repairs are completed, clear DTC and verify sensor operation.
  1. Turn ignition on with engine off. Connect scan tool to data link connector and verify DTC P0422 is set. If DTC P0130 or DTC P0136 and/or P0141 is set, repair these DTCs first. If no other DTCs are set, go to next step.
  2. Start engine and allow to idle. Inspect for exhaust leaks upstream and downstream of catalytic converter. Inspect for exhaust leaks around front and rear HO2S. If no leaks are found, go to next step. If leaks are found, repair exhaust leaks and retest. When repairs are completed, clear DTC and verify operation.
  3. Check rear HO2S operation. See «DTC P0130 OR P0136: HO2S CIRCUIT MALFUNCTION»(ref-3861-S17320388202000051700000) . If rear HO2S is okay, go to next step. If rear HO2S is not okay, perform repairs or component replacement as necessary. When repairs are completed, clear DTC and verify operation.
  4. Turn ignition off. Replace catalytic converter and clear DTC P0422. Road test vehicle and check for DTCs. If DTC P0422 resets, ensure ECM 88-pin connector and terminals are clean and tight. If ECM connector is okay, replace ECM. If DTC P0422 does not reset, repairs and inspection are complete. When repairs are completed, clear DTC and verify operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTCs P0441, P0442, P0443 and/or P0455 is set. If other DTCs related to EVAP system are set, check and repair any DTC P0442 through P0455 first.
  2. Start engine and allow to idle. Check EVAP control system vacuum hoses for vacuum leaks and clogs. Perform repairs as necessary. If no problems are found, go to next step. When repairs are completed, clear DTC and verify system operation.
  3. Turn ignition off. Disconnect canister purge control solenoid valve 2-pin connector. Turn ignition on. Measure voltage between ground and canister purge control solenoid valve harness connector terminal No. 1 (Red wire on Elantra; Pink wire on Tiburon). If battery voltage is present, go to next step. If battery voltage is not present, repair open or short to ground in circuit between purge control solenoid and engine control relay connector terminal No. 3 (Red wire on Elantra; Pink wire on Tiburon). When repairs are completed, clear DTC and verify system operation.
  4. Turn ignition off. Disconnect ECM 88-pin connector. Using a jumper wire, connect canister purge control solenoid valve 2-pin connector terminal No. 2 (Red/Black wire) to ground. Measure resistance between ground and ECM harness connector terminal No. 36 (Red/Black wire). If one ohm or less exists, remove jumper wire and go to next step. If more than one ohm exists, repair open in circuit between ECM and purge control solenoid valve. When repairs are completed, clear DTC and verify system operation.
  5. Turn ignition off. Disconnect canister purge control solenoid valve and ECM connectors. Check for continuity between ground and canister purge control solenoid valve connector terminal No. 2 (Red/Black wire). If continuity does not exist, go to next step. If continuity exists, repair short to ground or another circuit in wire between purge control solenoid and ECM. When repairs are completed, clear DTC and verify system operation.
  6. Turn ignition off. Disconnect canister purge control solenoid valve connector. Measure resistance between purge control solenoid valve terminals No. 1 and No. 2. If resistance is approximately 20-32 ohms, verify ECM connector terminals are clean and tight. If connector is okay, replace ECM. If resistance is not approximately 20-32 ohms, replace purge control solenoid valve. When repairs are completed, clear DTC and verify system operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTCs P0444 or P0445 is set. Turn ignition off. Disconnect canister purge control solenoid valve 2-pin connector. Turn ignition on. Measure voltage between ground and canister purge control solenoid valve connector terminal No. 1 (Red wire on Elantra; Pink wire on Tiburon). If battery voltage is present, go to next step. If battery voltage is not present, repair open or short to ground in circuit between engine control relay connector terminal No. 3 and canister purge control solenoid valve connector. When repairs are completed, clear DTC and verify system operation.
  2. Turn ignition off. Disconnect canister purge control solenoid valve and ECM 88-pin connectors. Using a jumper wire, connect canister purge control solenoid valve connector terminal No. 2 (Red/Black wire) to ground. Measure resistance between ground and ECM connector terminal No. 36 (Red/Black wire). If resistance is one ohm or less, remove jumper wire and go to next step. If resistance is more than one ohm, repair open in circuit between purge control valve and ECM. When repairs are completed, clear DTC and verify system operation.
  3. Disconnect canister purge control solenoid valve and ECM 88-pin connectors. Check for continuity between ground and purge control valve harness connector terminal No. 2 (Red/Black wire). If continuity does not exist, go to next step. If continuity exists, repair short to ground in circuit between purge control valve and ECM. When repairs are completed, clear DTC and verify system operation.
  4. Measure resistance between canister purge control solenoid valve terminals No. 1 and 2. If resistance is approximately 20-32 ohms at 68°F (20°C), verify ECM connector terminals are clean and tight. If connector terminals are okay, replace canister purge control solenoid valve. If problem persists, replace ECM. If resistance not approximately 20-32 ohms at 68°F (20°C), replace canister purge control solenoid valve. When repairs are completed, clear DTC and verify system operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTCs P0446, P0447 or P0448 is set. Turn ignition off. Disconnect canister close valve connector. Turn ignition on. Measure voltage between ground and canister close valve connector terminal No. 2 (Red/White wire). If battery voltage is present, go to next step. If battery voltage is not present, repair open or short in circuit between canister close valve, engine control relay and engine compartment fuse/relay box. When repairs are completed, clear DTC and verify system operation.
  2. Turn ignition off. Disconnect canister close valve 2-pin connector and ECM 88-pin connector. Using a jumper wire, connect canister close valve connector terminal No. 1 (Red/Black wire) to ground. Measure resistance between ground and ECM connector terminal No. 18 (Red/Black wire). If resistance is one ohm or less, remove jumper wire and go to next step. If resistance is more than one ohm, repair open in circuit between ECM and canister close valve. When repairs are completed, clear DTC and verify system operation.
  3. Turn ignitions off. Disconnect canister close valve 2-pin connector and ECM 88-pin connector. Check for continuity between ground and canister close valve connector terminal No. 1 (Red/Black wire). If continuity does not exist, go to next step. If continuity exists, repair short to ground in circuit between ECM and canister close valve. When repairs are completed, clear DTC and verify system operation.
  4. Turn ignitions off. Disconnect canister close valve 2-pin connector. Measure resistance between canister close valve terminals No. 1 and No. 2. If resistance is approximately 25 ohms at 68°F (20°C), ensure ECM connector terminals are clean and tight. If ECM connector is okay, replace canister close valve. Clear DTCs and verify system operation. If problem persists, replace ECM. If resistance is not approximately 25 ohms at 68°F (20°C), replace canister close valve. When repairs are completed, clear DTC and verify system operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTCs P0451, P0452 or P0453 is set. Start engine and allow to idle. Check EVAP system vacuum hoses for leaks and clogs. If vacuum hoses are okay, go to next step. If vacuum hoses are not okay, repair or replace hoses as necessary. When repairs are completed, clear DTC and verify system operation.
  2. Turn ignition off. Disconnect Fuel Tank Pressure (FTP) sensor 3-pin connector. Turn ignition on. Measure voltage between ground and FTP sensor harness connector terminal No. 1 (White/Black wire). If 4.5-5.0 volts is present, go to next step. If 4.5-5.0 volts is not present, repair open or short in circuit between FTP sensor and ECM connector terminal No. 59 (White/Black wire). When repairs are completed, clear DTC and verify system operation.
  3. Turn ignition off. Disconnect FTP sensor connector and ECM 88-pin harness connector. Using a jumper wire, connect FTP sensor connector terminal No. 3 (Orange wire) to ground. Measure resistance between ground and ECM harness connector terminal No. 76 (Yellow wire on Elantra; Orange wire on Tiburon). If resistance is one ohm or less, remove jumper wire and go to next step. If resistance is more than one ohm, repair open in circuit between FTP sensor and ECM. When repairs are completed, clear DTC and verify system operation.
  4. Turn ignition off. Check for continuity between ground and FTP sensor harness connector terminal No. 3 (Orange wire). If continuity does not exist, go to next step. If continuity exists, repair short to ground in circuit between FTP sensor and ECM. When repairs are completed, clear DTC and verify system operation.
  5. Turn ignition off. Disconnect FTP sensor connector and ECM 88-pin connector. Using a jumper wire, connect FTP sensor connector terminal No. 2 (Black/Yellow wire on Elantra; Yellow/Black wire on Tiburon) to ground. Measure resistance between ground and ECM harness connector terminal No. 71 (Pink wire on Elantra; White/Black wire on Tiburon). If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in circuit between FTP sensor and ECM. When repairs are completed, clear DTC and verify system operation.
  6. Turn ignition off. Measure resistance between FTP sensor terminals No. 1 and 2. If resistance is approximately 1100 ohms, go to next step. If resistance is not approximately 1100 ohms, replace FTP sensor. When repairs are completed, clear DTC and verify system operation.
  7. Turn ignition off. Measure resistance between FTP sensor terminals No. 2 and 3. If resistance is approximately 5800 ohms, ensure ECM connector terminals are clean and tight. If ECM connector is okay, replace FTP sensor. Clear DTC and verify system operation. If problem persists, replace ECM. If resistance is not approximately 5800 ohms, replace FTP sensor. When repairs are completed, clear DTC and verify system operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P0501 is set. Test drive vehicle and ensure speedometer operates properly. On Elantra, if speedometer operates properly, go to next step. On Tiburon, if speedometer operates properly, go to step 6 . On Elantra, if speedometer does not operate properly, repair speedometer cable and/or cable drive gear. On Tiburon, if speedometer does not operate properly, check VSS operation. Replace as necessary. On all models, when repairs are completed, clear DTC and verify VSS operation.
  2. Turn ignition on and observe instrument cluster indicators. If all instrument cluster indicators operate properly, go to next step. If instrument cluster indicators do not operate properly, repair ground circuit between instrument cluster and ground connection located behind left front kick panel. When repairs are completed, clear DTC and verify VSS operation.
  3. Turn ignition off. Disconnect specified instrument cluster I01-1, I01-2, I01-3, I04-2 and I04-3 connectors. See «IDENTIFYING INSTRUMENT CLUSTER VSS TESTING TERMINALS»(ref-3861-S21923623722000051700000) table. Measure resistance in VSS signal circuit between ground and specified instrument cluster harness connector terminal. On all models, if resistance is more than 50 ohms, go to next step. If resistance is less than 50 ohms, repair short to ground in suspect circuit between instrument cluster and ECM connector terminal No. 42. When repairs are completed, clear DTC and verify system VSS operation. IDENTIFYING INSTRUMENT CLUSTER VSS TESTING TERMINALS Vehicle Connector/Terminal No. (Wire Color) Elantra GL Model (1) 10-Pin I04-2/ 1 (YEL/WHT) (1) 12-Pin I04-3/ 9 (YEL/WHT) (2) (3) 12-Pin I04-1/ 8 (GRN/BLK) GLS Model (1) 12-Pin I01-2/ 3 (YEL/WHT) (1) 12-Pin I01-3/ 9 (YEL/WHT) (2) (3) 10-Pin I01-1/ 3 (GRN/BLK) Tiburon (4) 16-Pin I01-1/ 9 (YEL/BLK) (3) (4) 16-Pin I01-2/ 14 (BLK) (1) Connectors I01-2 and I04-2 are located at upper left side of instrument cluster. Connectors I01-3 and I04-3 are located at right side of instrument cluster. (2) Connector I01-1 (GLS model) or I04-1 (GL model) is located at lower left side of instrument cluster. (3) Instrument cluster ground circuit. (4) Connector I01-1 is located at right side of instrument cluster. Connector I01-2 is located at right side of instrument cluster.
  4. Turn ignition off. Disconnect ECM 88-pin connector. Using a jumper wire, connect ECM connector terminal No. 42 (Yellow/Black wire) to ground. Measure resistance between ground and specified instrument cluster harness connector terminal. See «IDENTIFYING INSTRUMENT CLUSTER VSS TESTING TERMINALS»(ref-3861-S21923623722000051700000) table. On all models, if resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in suspect circuit between instrument cluster and ECM. When repairs are completed, clear DTC and verify VSS system operation.
  5. On Elantra, disconnect instrument cluster connector I01-1 (GLS model) or I04-1 (GL model). Rotate speedometer cable and check for toggling continuity between instrument cluster VSS signal and ground terminals. See appropriate wiring diagram in «WIRING DIAGRAMS»(ref-3147) article. Continuity should toggle on and off 4 times for every speedometer rotation. If continuity toggles as specified, verify ECM connector terminals are clean and tight. If ECM connector is okay, replace VSS with a known-good component. Clear DTC and verify system operation. If problem persists, replace ECM. If continuity does not toggle as specified, replace VSS. When repairs are completed, clear DTC and verify system operation.
  6. Turn ignition on and observe instrument cluster indicators. If all instrument cluster indicators operate properly, go to next step. If instrument cluster indicators do not operate properly, repair ground circuit between instrument cluster and ground connection located behind left front kick panel. When repairs are completed, clear DTC and verify VSS operation.
  7. Turn ignition off. Disconnect instrument cluster I01-1 connector. Measure resistance in VSS signal circuit between ground and instrument cluster I01-1 connector terminal No. 9 (Yellow/Black wire). If resistance is more than 50 ohms, go to next step. If resistance is less than 50 ohms, repair short to ground in suspect circuit between instrument cluster, TCM 16-pin connector terminal No 16 (Yellow/White wire), ECM connector terminal No. 42 and/or VSS connector terminal No. 2 (Yellow/Black wire). When repairs are completed, clear DTC and verify system VSS operation.
  8. Turn ignition off. Disconnect ECM 88-pin connector. Using a jumper wire, connect ECM connector terminal No. 42 (Yellow/Black wire) to ground. Measure resistance between ground and instrument cluster I01-1 connector terminal No. 9. If resistance is one ohm or less, verify ECM connector terminals are clean and tight. If ECM connector is okay, replace VSS with a known-good component. Clear DTC and verify system operation. If problem persists, replace ECM. If resistance is more than one ohm, repair open in circuit between instrument cluster and ECM. When repairs are completed, clear DTC and verify VSS system operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P0506 or P0507 is set. If DTC P0121, P0122 or P0123 is also set, repair that DTC first. If DTC P0121, P0122 or P0123 is not set, go to next step. When repairs are completed, clear DTC and verify system operation.
  2. Turn ignition off. Disconnect ISC harness connector. Turn ignition on. Measure voltage between ground and ISC actuator harness connector terminal No. 2 (Red/White wire). If battery voltage is present, go to next step. If battery voltage is not present, repair open in circuit between ISC actuator and engine control relay connector terminal No. 1. When repairs are completed, clear DTC and verify system operation.
  3. Turn ignition off. Disconnect ECM 88-pin connector. Using jumper wires, connect ISC harness connector terminals No. 1 and No. 3 to ground. Measure resistance between ground and ECM connector terminal No. 29 (White/Black wire) and ECM harness connector terminal No. 2 (Brown/Black wire). If resistance for both circuits is one ohm or less, remove jumper wires and go to next step. If resistance is more than one ohm, repair open in suspect circuit between ISC actuator and ECM. When repairs are completed, clear DTC and verify system operation.
  4. Turn ignition off. Check continuity between ground and ISC actuator harness connector terminals No. 1 (Brown/Black wire on Elantra; White/Black wire on Tiburon) and No. 3 (White/Black wire on Elantra; Brown/Black wire on Tiburon). If continuity does not exist, go to next step. If continuity exists, repair short to ground in suspect circuit between ISC actuator and ECM. When repairs are completed, clear DTC and verify system operation.
  5. Turn ignition off. Measure resistance between ISC actuator terminals No. 1 and 2, and between terminals No. 2 and 3. If resistance is 10-14 ohms at 68°F (20°C), go to next step. If resistance is not 10-14 ohms at 68°F (20°C), replace ISC actuator. When repairs are completed, clear DTC and verify system operation.
  6. Ensure ISC actuator valve is clean and not sticking. Ensure throttle lever and return spring is clean and not sticking or binding. Ensure intake air system and vacuum hoses are tight and free of vacuum leaks. Perform repairs as necessary. If repairs are not needed, ensure ECM connector terminals are clean and tight. If connector is okay, replace ISC actuator. If problem persists, replace ECM. When repairs are completed, clear DTC and verify system operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P1123, P1124, P1127 or P1128 is set. If no other DTCs are set, go to next step. If one or more DTCs P0102 through P0123 are also set, repair those DTCs first. When repairs are completed, clear DTC and verify system operation.
  2. Turn ignition off. Check air intake system and vacuum hoses for leaks and/or obstructions. Perform repairs as necessary. If no problems are found, go to next step. When repairs are completed, clear DTC and verify system operation.
  3. Turn ignition off. Check exhaust system including manifold, muffler, and catalytic converter for leaks. Check for loose or malfunctioning HO2S. See DTCs P0130 through P0141. Perform repairs as necessary. If no exhaust leaks are found, go to next step. When repairs are completed, clear DTC and verify system operation.
  4. Turn ignition off. Check EVAP canister purge solenoid valve and circuit. See appropriate DTC testing. If EVAP system is okay, go to next step. Perform repairs as necessary. When repairs are completed, clear DTC and verify system operation.
  5. Turn ignition off. Check fuel injectors for clogging or bad wiring. See DTCs P0201 through P0204. Perform repairs as necessary. If fuel injectors are okay, go to next step. When repairs are completed, clear DTC and verify system operation.
  6. Turn ignition off. Inspect fuel pressure regulator. See «FUEL PRESSURE TEST»(ref-3129-S13673442392000041800000) under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. Perform repairs as necessary. If regulator is okay, go to next step. When repairs are completed, clear DTC and verify system operation.
  7. Turn ignition off. Inspect fuel pump and fuel pressure. See «FUEL PRESSURE TEST»(ref-3129-S13673442392000041800000) under FUEL SYSTEM in BASIC DIAGNOSTIC PROCEDURES article. Perform repairs as necessary. If fuel pump is okay, ensure ECM connector terminals are clean and tight. If connector and terminals are okay, replace ECM. If fuel pump is not okay, replace fuel pump. When repairs are completed, clear DTC and verify system operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P1510 or P1552 is set. Turn ignition off. Disconnect ISC actuator harness connector. Turn ignition on. Measure voltage between ground and ISC actuator harness connector terminal No. 2 (Red/White wire). If battery voltage is present, go to next step. If battery voltage is not present, repair open in circuit between engine control relay and ISC actuator. When repairs are completed, clear DTC and verify system operation.
  2. Turn ignition on. Measure voltage between ground and ISC actuator harness connector terminal No. 1 (Brown/Black wire on Elantra; White/Black wire on Tiburon). If voltage is less than 0.5 volt, go to next step. If voltage is 0.5 volt or more, repair circuit between ISC actuator connector terminal No. 1 and ECM connector terminal No. 2 on Elantra or terminal No. 29 on Tiburon. When repairs are completed, go to next step.
  3. Turn ignition on. Measure voltage between ground and ISC actuator harness connector terminal No. 3 (White/Black wire on Elantra; Brown/Black wire on Tiburon). If voltage is less than 0.5 volt, go to next step. If voltage is 0.5 volt or more, repair circuit between ISC actuator connector terminal No. 3 and ECM connector terminal No. 29 on Elantra or terminal No. 2 on Tiburon. When repairs are completed, clear DTC and verify system operation.
  4. Turn ignition off. Measure resistance between ISC actuator terminals No. 1 and 2, and between terminals No. 2 and 3. If resistance is 10-14 ohms at 68°F (20°C), ensure ECM connector terminals are clean and tight. If connector and terminals are okay, replace ISC actuator. Clear DTC and verify system operation. If problem persists, replace ECM. If resistance is not 10-14 ohms, replace ISC actuator. When repairs are completed, clear DTC and verify system operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P1513 or P1553 is set. Turn ignition off. Disconnect ISC actuator harness connector. Turn ignition on. Measure voltage between ground and ISC actuator harness connector terminal No. 2 (Red/White wire). If battery voltage is present and DTC P1513 is set, go to next step. If battery voltage is present and DTC P1553 is set, go to step 4 . If battery voltage is not present, repair open in circuit between engine control relay and ISC actuator. When repairs are completed, clear DTC and verify system operation.
  2. Turn ignition off. Disconnect ISC actuator connector and ECM 88-pin connector. If DTC P1513 is set, using a jumper wire, connect ISC connector terminal No. 3 on Elantra or terminal No. 1 on Tiburon to ground. Measure resistance between ground and ECM harness connector terminal No. 29 (White/Black wire). If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in circuit between ISC actuator and ECM. When repairs are completed, clear DTC and verify system operation.
  3. Turn ignition off. Remove jumper wire. Check continuity between ground and ISC actuator harness connector terminal No. 3 on Elantra or terminal No. 1 on Tiburon. If continuity does not exist, go to step 6 . If continuity exists, repair short to ground in circuit between ISC actuator and ECM. When repairs are completed, clear DTC and verify system operation.
  4. Turn ignition off. Disconnect ISC actuator connector and ECM 88-pin connector. If DTC P1553 is set, using a jumper wire, connect ISC connector terminal No. 1 on Elantra or terminal No. 3 on Tiburon to ground. Measure resistance between ground and ECM harness connector terminal No. 2 (Brown/Black wire). If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in circuit between ISC actuator and ECM. When repairs are completed, clear DTC and verify system operation.
  5. Turn ignition off. Remove jumper wire. Check continuity between ground and ISC actuator harness connector terminal No. 1 on Elantra or terminal No. 3 on Tiburon. If continuity exists, go to next step. If continuity does not exist, repair short to ground in circuit between ISC actuator and ECM. When repairs are completed, clear DTC and verify system operation.
  6. Turn ignition off. Measure resistance between ISC actuator terminals No. 1 and 2, and between terminals No. 2 and 3. If resistance is 10-14 ohms at 68°F (20°C), ensure ECM connector terminals are clean and tight. If connector and terminals are okay, replace ISC actuator. Clear DTC and verify system operation. If problem persists, replace ECM. If resistance is not 10-14 ohms, replace ISC actuator. When repairs are completed, clear DTC and verify system operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P1605 or P1606 is set. Turn ignition off. Disconnect acceleration sensor connector. Turn ignition on. Measure voltage between ground and acceleration sensor connector terminal No. 1 (White/Black wire). If 5.0 volts exists, go to next step. If 5.0 volts does not exist, repair open in circuit between acceleration sensor and ECM connector terminal No. 59. When repairs are completed, clear DTC and verify system operation.
  2. Turn ignition off. Disconnect acceleration sensor connector. Measure resistance between ground and acceleration sensor connector terminal No. 2 (Pink wire on Elantra; Blue/Black wire on Tiburon). If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in circuit between acceleration sensor and ECM connector terminal No. 71 (Pink wire on Elantra; White/Black wire on Tiburon). When repairs are completed, clear DTC and verify system operation.
  3. Turn ignition off. Disconnect acceleration sensor connector. Disconnect ECM harness connector. Using a jumper wire, connect acceleration sensor connector terminal No. 3 (Brown/Black wire on Elantra; Orange/Black wire on Tiburon) to ground. Measure resistance between ground and ECM connector terminal No. 80. If resistance is one ohm or less, remove jumper wire and go to next step. If resistance is more than one ohm, repair open in circuit between acceleration sensor and ECM. When repairs are completed, clear DTC and verify system operation.
  4. Turn ignition off. Disconnect acceleration sensor and ECM connectors. Check for continuity between ground and acceleration sensor connector terminal No. 3 (Brown/Black wire on Elantra; Orange/Black wire on Tiburon). If continuity does not exist, go to next step. If continuity exists, repair short to ground in circuit between acceleration sensor and ECM. When repairs are completed, clear DTC and verify system operation.
  5. Turn ignition off. Disconnect acceleration sensor connector. Measure resistance between acceleration sensor terminals No. 2 and 3. If resistance is approximately 21,000 ohms, go to next step. If resistance is not approximately 21,000 ohms, replace acceleration sensor. When repairs are completed, clear DTC and verify system operation.
  6. Turn ignition off. Reconnect acceleration sensor and ECM connectors. Start engine and allow to idle. Backprobe acceleration sensor connector and measure voltage between ground and acceleration sensor connector terminal No. 1 (White/Black wire). If 2.3-2.7 volts are present, ensure ECM connector terminals are clean and tight. If ECM connector is okay, replace acceleration sensor. If problem persists, replace ECM. If 2.3-2.7 volts is not present, replace acceleration sensor. When repairs are completed, clear DTC and verify system operation.
  1. Turn ignition on. Connect scan tool to data link connector and verify DTC P1611 or P01613 is set. Repair DTC P1586 first, if set.
  2. Turn ignition off. Disconnect ECM 88-pin connector and TCM 26-pin connector. Using a jumper wire, connect TCM connector terminal No. 22 (Orange wire on Elantra; Yellow/Black wire on Tiburon) to ground. Measure resistance between ground and ECM connector terminal No. 61 (Orange wire on Elantra; Blue/Black wire on Tiburon). If resistance is one ohm or less, go to next step. If resistance is more than one ohm, repair open in circuit between ECM and TCM. When repairs are completed, clear DTC and verify system operation.
  3. Turn ignition off. Disconnect ECM 88-pin connector and TCM 26-pin connector. Check for continuity between ground and TCM 26-pin connector terminal No. 22 (Orange wire on Elantra; Yellow/Black wire on Tiburon). If DTC P1611 is set, go to step 5 . If DTC P1613 is set and continuity does not exist, go to next step. If DTC P1613 is set and continuity exists, repair short to ground in circuit between ECM and TCM. When repairs are completed, clear DTC and verify system operation.
  4. If DTC P1613 is set, ensure ignition is off. Disconnect ECM 88-pin connector and TCM 26-pin connector. Measure voltage between ground and TCM 26-pin connector terminal No. 22 (Orange wire on Elantra; Yellow/Black wire on Tiburon). If voltage is present, repair short to voltage in circuit between ECM and TCM. If voltage is not present, ensure ECM and TCM connector terminals are clean and tight. If connectors are okay, replace TCM with a known-good component. Clear DTC and verify system operation. If problem persists, replace ECM. When repairs are completed, clear DTC and verify system operation.
  5. If DTC P1611 is set, ensure ignition is off. If continuity exists, repair short in circuit between ECM and TCM. If continuity does not exist, ensure ECM and TCM connector terminals are clean and tight. If connectors are okay, replace TCM with a known-good component. Clear DTC and verify system operation. If problem persists, replace ECM. When repairs are completed, clear DTC and verify system operation.

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