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Engine Control System - G3.5 DOHC: Diagnosis Hyundai Santa Fe II facelift

Testing & Diagnostics 28 illustrations ~1530 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, replace the ECM with a new one, and then check the vehicle again. If the vehicle operates normally then the problem was likely with the 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 «INTERMITTENT PROBLEM INSPECTION PROCEDURE»(ref-492243-S26740760732012080100000) .)

Inspection

  1. Connect the 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-492243-S33687164122012080100000) .

Scheme 236

Scheme 236: Removal
Scheme 236: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the barometric pressure sensor connector (A).
  3. Remove the installation bolt (B), and then remove the sensor from the air cleaner assembly.
  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 «SPECIFICATION»(ref-492243-S16209410162012080100000) .

Scheme 237

Scheme 237: Removal
Scheme 237: 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 bolts (B), and then vertically remove the sensor from the surge tank.
  1. Connect the GDS on the Data Link Connector (DLC).
  2. Measure the output voltage of the MAPS at idle and IG ON. MANIFOLD ABSOLUTE PRESSURE SENSOR OUTPUT VOLTAGE SPECIFICATIONS Condition Output Voltage (V) IG ON Approx. 4.44V Idle Approx. 0.75V

Scheme 238

Scheme 238: Removal
Scheme 238: 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 bolts (B), and then vertically remove the sensor from the surge tank.
  1. Turn the ignition switch OFF.
  2. Disconnect the ECTS connector.
  3. Remove the ECTS. (Refer to «REMOVAL»(ref-492243-S25739585412012080100000) .)
  4. After immersing the thermistor of the sensor into engine coolant, measure resistance between the ECTS terminals 3 and 4.
  5. Check that the resistance is within the specification. Specification: Refer to «SPECIFICATION»(ref-492243-S11867496652012080100000) .

Scheme 239

Scheme 239: Removal
Scheme 239: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Remove the air cleaner assembly. (Refer to «INTAKE AND EXHAUST SYSTEM»(ref-492230) .)
  3. Disconnect the engine coolant temperature sensor connector (A).
  4. Remove the spring clip (B), and then pull the sensor from the water temperature control assembly. CAUTION: Note that engine coolant may be flowed out from the water temperature control assembly when removing the sensor.
  5. Supplement the engine coolant. (Refer to «COOLING SYSTEM»(ref-492233) .)
  1. Check the signal waveform of the CMPS and CKPS using the GDS. Specification: Refer to «WAVE FORM»(ref-492243-S41065597172012080100000) .

Scheme 240

Scheme 240: Removal
Scheme 240: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Remove the air cleaner assembly. (Refer to «INTAKE AND EXHAUST SYSTEM»(ref-492230) .)
  3. Disconnect the crankshaft position sensor connector (A).
  4. Remove the installation bolt (B), and then vertically remove the sensor from the transaxle housing.
  1. Check the signal waveform of the CMPS and CKPS using the GDS. Specification: Refer to «WAVE FORM»(ref-492243-S41971588992012080100000) .
  1. Turn the ignition switch OFF.
  2. Disconnect the HO2S connector.
  3. Measure resistance between the HO2S terminals 3 and 4.
  4. Check that the resistance is within the specification. Specification: Refer to «SPECIFICATION»(ref-492243-S33368016642012080100000) .

Scheme 241

Scheme 241: Removal
Scheme 241: Removal

Scheme 242

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Scheme 243

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Scheme 247

Scheme 248

Scheme 248
Scheme 248
  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.: 09392-2H100) is useful when removing the heated oxygen sensor. [Bank 1/Sensor 1] [Bank 1/Sensor 2] [Bank 2/Sensor 1] [Bank 2/Sensor 2]
  1. Turn the ignition switch OFF.
  2. Disconnect the OTS connector.
  3. Remove the OTS. (Refer to «REMOVAL»(ref-492243-S00416977102012080100000) .)
  4. After immersing the thermistor of the sensor into engine coolant, measure resistance between the OTS terminals 1 and 2.
  5. Check that the resistance is within the specification. Specification: Refer to «SPECIFICATION»(ref-492243-S02146394762012080100000) .

Scheme 249

Scheme 249: Removal
Scheme 249: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Remove the air cleaner assembly. (Refer to «INTAKE AND EXHAUST SYSTEM»(ref-492230) .)
  3. Disconnect the connector (A), and then remove the CVVT oil temperature sensor (B).
  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-492243-S37865186432012080100000) .
  1. Connect the GDS on the Data Link Connector (DLC).
  2. Measure the output voltage of the FTPS. Specification: Refer to «SPECIFICATION»(ref-492243-S26644017832012080100000) .

Scheme 250

Scheme 250: Removal
Scheme 250: Removal

Scheme 251

Scheme 251
Scheme 251

Scheme 252

Scheme 252
Scheme 252
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Remove the rear seat. (Refer to «REAR SEAT»(ref-492166-S12754893582012080100000) .)
  3. Remove the fuel pump service cover (A). NOTE: The wiring in between the fuel pump and the sub fuel sender is fastened to the vehicle. So please separate it before removing the fuel pump service cover in accordance with the procedures below. Remove the sub fuel sender cover and disconnect the sub fuel sender connector. (Refer to «SUB FUEL SENDER»(ref-492244-S03261060732012080100000) .) Release the wiring clips (A) under the carpet.
  4. Disconnect the fuel tank pressure sensor connector (A), and then remove the fuel tank pressure sensor.
  1. Check the signal waveform of the VCM position sensor using the GDS. NOTE: In order to operate VCMA, use the actuator test function in the GDS. Specification: Refer to «WAVE FORM»(ref-492243-S31551572352012080100000) .

Scheme 253

Scheme 253: Removal
Scheme 253: Removal
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Remove the intake manifold. (Refer to «INTAKE AND EXHAUST SYSTEM»(ref-492230) .)
  3. Remove the installation screws (A), and then remove the VCM position sensor.
  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 «SPECIFICATION»(ref-492243-S31059913912012080100000) .

Scheme 254

Scheme 254: Removal
Scheme 254: Removal

Scheme 255

Scheme 255
Scheme 255

Scheme 256

Scheme 256
Scheme 256
  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-492244-S06485014652012080100000) .) 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 surge tank. (Refer to «INTAKE AND EXHAUST SYSTEM»(ref-492230) .)
  4. Disconnect the injector [Bank 1] connector (A). NOTE: The injector [Bank 2] connector was disconnected when removing the surge tank.
  5. Remove the delivery pipe installation bolts (B).
  6. Remove the installation nuts (A), and then remove the delivery pipe & injector assembly from the engine.
  7. Remove the fixing clip (A), and then separate the injector (B) from the delivery pipe.
  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 «SPECIFICATION»(ref-492243-S39666073242012080100000) .

Scheme 257

Scheme 257: Removal
Scheme 257: 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, C) from the purge control solenoid valve.
  4. Remove the valve (B) from the bracket.
  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 «SPECIFICATION»(ref-492243-S40174093892012080100000) .
  1. Turn the ignition switch OFF.
  2. Disconnect the VIS valve connector.
  3. Measure resistance between the VIS valve terminals 1 and 2.
  4. Check that the resistance is within the specification. Specification: Refer to «SPECIFICATION»(ref-492243-S36198443232012080100000) .

Scheme 258

Scheme 258: Removal
Scheme 258: Removal

Scheme 259

Scheme 259
Scheme 259
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the variable intake solenoid valve connector (A).
  3. Disconnect the vacuum hoses (B, C) from the valve.
  4. Remove the installation nut (D), and then remove the valve from the surge tank. [Valve 1 (Intake Manifold)] [Valve 2 (Surge Tank)]
  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 «SPECIFICATION»(ref-492243-S36636229602012080100000) .
  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 260

Scheme 260: Removal
Scheme 260: Removal

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Scheme 263
  1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
  2. Disconnect the canister close valve connector (A).
  3. Disconnect the ventilation tube quick connector (B).
  4. Release the lever (A), and then remove the canister close valve & fuel tank air filter assembly (B) after rotating it in the direction of the arrow in the figure.
  5. 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 in the figure.

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