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Engine Control System - Turbo: Diagnosis Hyundai Veloster I

Testing & Diagnostics 23 illustrations ~1494 words

ECM Problem Inspection Procedure

  1. TEST ECM GROUND CIRCUIT: Measure resistance between ECM and chassis ground using the backside of ECM harness connector as ECM side check point. If the problem is found, repair it. Specification: Below 1ohms
  2. TEST ECM CONNECTOR: Disconnect the ECM connector and visually check the ground terminals on ECM side and harness side for bent pins or poor contact pressure. If the problem is found, repair it.
  3. If problem is not found in Step 1 and 2 , the ECM could be faulty. If so, make sure there were no DTC's before swapping the ECM with a new one, and then check the vehicle again. If DTC's were found, examine this first before swapping ECM.
  4. RE-TEST THE ORIGINAL ECM: Install the original ECM (may be broken) into a known-good vehicle and check the vehicle. If the problem occurs again, replace the original ECM with a new one. If problem does not occur, this is intermittent problem (Refer to «BASIC INSPECTION PROCEDURE»(ref-609318-S10547370632014041600000) "Intermittent Problem Inspection Procedure" in Basic Inspection Procedure).

Inspection

  1. Connect the GDS on the Data Link Connector (DLC).
  2. Measure the output voltage of the MAPS at idle and IG ON. Specification: Refer to " «Specifications»(ref-609319-S41134724432014041600000) "

Scheme 269

Scheme 269: Removal
Scheme 269: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the manifold absolute pressure sensor connector (A).
  3. Remove the installation bolt (B), and then remove the sensor from the surge tank.
  1. Turn the ignition switch OFF.
  2. Disconnect the IATS connector.
  3. Measure resistance between the IATS terminals 3 and 4.
  4. Check that the resistance is within the specification. Specification: Refer to " «Specifications»(ref-609319-S13407864732014041600000) "
  1. Turn the ignition switch OFF.
  2. Disconnect the ATS connector.
  3. Measure resistance between the ATS terminals 1 and 2 [B1/S1].
  4. Check that the resistance is within the specification. Specification: Refer to " «SPECIFICATION»(ref-609319-S18639774742014041600000) "

Scheme 270

Scheme 270: Removal
Scheme 270: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the Ambient Temperature Sensor connect (A).
  3. Remove the Ambient Temperature Sensor bracket (B).
  1. Connect a GDS on the Data Link Connector (DLC).
  2. Measure the output voltage of the BPS at idle and IG ON. Specification: Refer to " «SPECIFICATION»(ref-609319-S24818859352014041600000) "

Scheme 271

Scheme 271: Removal
Scheme 271: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the boost pressure sensor connector (A).
  3. Remove the installation bolt (B), and then remove the sensor.
  1. Turn the ignition switch OFF.
  2. Remove the ECTS (Refer to " «Removal»(ref-609319-S30882597332014041600000) ").
  3. After immersing the thermistor of the sensor into engine coolant, measure resistance between the ECTS terminals 3 and 4.
  4. Check that the resistance is within the specification. Specification: Refer to " «Specifications»(ref-609319-S23810170372014041600000) "

Scheme 272

Scheme 272: Removal
Scheme 272: Removal

Scheme 273

Scheme 273
Scheme 273
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Remove the air cleaner assembly and air intake hose. (Refer to " «AIR CLEANER»(ref-609292-S06516152692014041600000) ")
  3. Relax the engine wiring. Disconnect the ignition coil (A). Disconnect the OCV (B). Disconnect the CMPS (C). Disconnect the FPCV (D). Disconnect the PCSV (E). Remove the engine wiring installation bolts (F) and then remove the engine wiring harness (G).
  4. Remove the vacuum pipe installation bolts (A) and relax the bracket.
  5. Disconnect the engine coolant temperature sensor connect (B).
  6. Remove the engine coolant temperature sensor (C). CAUTION: Note that engine coolant may be flowed out from the water temperature control assembly when removing the sensor.
  7. Fill with engine coolant. (Refer to " «COOLANT»(ref-609294-S25286250992014041600000) ")
  1. Check signal waveform of CKPS and CMPS using a GDS. Specification : Refer to " «WAVEFORM»(ref-609319-S25306285582014041600000) "

Scheme 274

Scheme 274: Removal
Scheme 274: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the crankshaft position sensor connector (A) and remove the sensor (B) after removing the installation bolt.
  1. Check the signal waveform of the CMPS and CKPS using the GDS. Specification: Refer to " «WAVE FORM»(ref-609319-S08005901012014041600000) "
  1. Turn the ignition switch OFF.
  2. Disconnect the HO2S connector.
  3. Measure resistance between the HO2S terminals 2 and 5 [B1/S1].
  4. Measure resistance between the HO2S terminals 3 and 4 [B1/S2].
  5. Check that the resistance is within the specification. Specification : Refer to " «Specifications»(ref-609319-S40844977462014041600000) "

Scheme 275

Scheme 275: Bank 1/Sensor 1
Scheme 275: Bank 1/Sensor 1

Scheme 276

Scheme 276
Scheme 276

Scheme 277

Scheme 277
Scheme 277
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the connector (A), and then remove the sensor (B). NOTE: Note that the SST (Part No.: 09392-1Y100) is useful when removing the heated oxygen sensor.

Scheme 278

Scheme 278: Bank 1/Sensor 2
Scheme 278: Bank 1/Sensor 2

Scheme 279

Scheme 279
Scheme 279

Scheme 280

Scheme 280
Scheme 280
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Remove the console side cover (A).
  3. Disconnect the connector (A).
  4. Remove heated oxygen sensor (A).
  1. Connect the GDS on the Data Link Connector (DLC).
  2. Measure the output voltage of the RPS at idle and various engine speed. Condition Output Voltage (V) Idle Approx. 1.2 1, 500 RPM 2.2 ~ 2.5 6, 300 RPM Approx. 3.0

Scheme 281

Scheme 281: Removal
Scheme 281: Removal

Scheme 282

Scheme 282
Scheme 282
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Release the residual pressure in fuel line. (Refer to " «RELEASE RESIDUAL PRESSURE IN FUEL LINE»(ref-609301-S41488293332014041600000) ") CAUTION: When removing the fuel pump relay, a Diagnostic Trouble Code (DTC) may occur. Delete the code with the GDS after completion of "Release Residual Pressure in Fuel Line" work.
  3. Remove the intake manifold. (Refer to " «INTAKE MANIFOLD»(ref-609292-S31560120492014041600000) ")
  4. Remove the injector foam (A).
  5. Disconnect the rail pressure sensor connector (A), and then remove the sensor (B) from the delivery pipe.
  1. Connect the GDS on the Data Link Connector (DLC).
  2. Turn the ignition switch ON.
  3. Measure the output voltage of the APS 1 and 2 at C.T and W.O.T. Specification: Refer to " «SPECIFICATION»(ref-609319-S07101402382014041600000) "
  1. Turn the ignition switch OFF.
  2. Disconnect the injector connector.
  3. Measure resistance between the injector terminals 1 and 2.
  4. Check that the resistance is within the specification. Specification: Refer to " «Specifications»(ref-609319-S16724600402014041600000) "
  1. Turn the ignition switch OFF.
  2. Disconnect the PCSV connector.
  3. Measure resistance between the PCSV terminals 1 and 2.
  4. Check that the resistance is within the specification. Specification : Refer to " «Specifications»(ref-609319-S37629472602014041600000) "

Scheme 283

Scheme 283: Removal
Scheme 283: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the purge control solenoid valve connector (A).
  3. Disconnect the vapor hoses (B) from the purge control solenoid valve.
  4. Remove the installation bolt (C), and then remove the PCSV (D) from the engine.
  1. Turn the ignition switch OFF.
  2. Disconnect the OCV connector.
  3. Measure resistance between the OCV terminals 1 and 2.
  4. Check that the resistance is within the specification. Specification : Refer to " «Specifications»(ref-609319-S02457314222014041600000) "

Scheme 284

Scheme 284: Removal
Scheme 284: Removal

Scheme 285

Scheme 285
Scheme 285
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the CVVT oil control valve connector (A).
  3. Remove the installation bolt (B), and then remove the valve from the engine. [Bank 1/Intake] [Bank 1/Exhaust]
  1. Turn the ignition switch OFF.
  2. Disconnect the WGV connector.
  3. Measure resistance between the WGV terminals 1 and 2 [B1/S1].
  4. Check that the resistance is within the specification. Specification : Refer to " «Specifications»(ref-609319-S06219814302014041600000) "

Scheme 286

Scheme 286: Removal
Scheme 286: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the waste gate solenoid valve connector (A).
  3. Disconnect the vapor hoses (B) from the waste gate solenoid valve.
  4. Remove the valve after removing the bolt (C).
  5. Remove the waste gate solenoid valve (D).
  1. Turn the ignition switch OFF.
  2. Disconnect the RCV connector.
  3. Measure resistance between the RCV terminals 1 and 2.
  4. Check that the resistance is within the specification. Specification : Refer to " «Specifications»(ref-609319-S41765428142014041600000) "

Scheme 287

Scheme 287: Removal
Scheme 287: Removal

Scheme 288

Scheme 288
Scheme 288

Scheme 289

Scheme 289
Scheme 289
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Remove the air duck (A).
  3. Disconnect the cooling pan control connector (A) and cooling pan & RCV extension connector (B) from the bracket.
  4. Disconnect the RCV control solenoid valve connector (A) and vapor hose (B).
  5. Remove the installation bolts (C) and then RCV control solenoid valve (D).
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the fuel pressure regulator valve connector.
  3. Measure resistance between the fuel pressure regulator valve terminals 1 and 2.
  4. Check that the resistance is within the specification. Specification : Refer to " «Specifications»(ref-609319-S22282178632014041600000) "
  1. Turn the ignition switch OFF.
  2. Disconnect the CCV connector.
  3. Measure resistance between the CCV terminal 1 and 2.
  4. Check that the resistance is within the specification. Specification : Refer to " «Specifications»(ref-609319-S41568412542014041600000) "
  5. Disconnect the vapor hose connected with the canister from the CCV.
  6. Connect a vacuum pump to the nipple.
  7. Ground the CCV control line and apply battery voltage to the CCV power supply line.
  8. Apply vacuum and check the valve operation. Specification : Vacuum maintained

Scheme 290

Scheme 290: Removal
Scheme 290: Removal

Scheme 291

Scheme 291
Scheme 291
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Lift the vehicle.
  3. Disconnect the canister close valve connector (A).
  4. Disconnect the ventilation hose (B) from the fuel tank air filter and canister close valve.
  5. Remove the fuel tank air filter assembly after removing bolts (C).
  6. Release the lever (A), and then separate the canister close valve (B) from the fuel tank air filter (C) after rotating it in the direction of the arrow shown in the illustration.

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