Engine Control System - Hev: Diagnosis Hyundai Sonata VI

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 «ECM Problem Inspection Procedure»(ref-419422-S07063624872011091200000) ).

Inspection

1. Connect the GDS on the Data Link Connector (DLC).
2. Measure the output voltage of the MAPS at idle and IG ON. VOLTAGE SPECIFICATIONS Test Condition Output Voltage (V) IG ON 3.9 ~ 4.1 Idle 0.8 ~ 1.6

Scheme 110

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 " SPECIFICATION "

1. Turn the ignition switch OFF.
2. Disconnect the ECTS connector.
3. Remove the ECTS.
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 "

Scheme 111

Scheme 112

1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2. Disconnect the engine coolant temperature sensor connector (A).
3. Remove the fixing clip (A), 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.
4. Supplement the engine coolant (Refer to " «COOLING SYSTEM»(ref-419395) " in EM group).

1. Check the signal waveform of the CMPS and CKPS using the GDS.

Specification: Refer to " WAVE FORM "

Scheme 113

Scheme 114

Scheme 115

1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2. Disconnect the crankshaft position sensor connector (A).
3. Remove the protector (A).
4. Remove the installation bolt (A), and then remove the crankshaft position sensor.

1. Check the signal waveform of the CMPS and CKPS using the GDS.

Specification: Refer to " WAVE FORM "

1. Turn the ignition switch OFF.
2. Disconnect the HO2S connector.
3. Measure resistance between the HO2S terminals 4 and 5 [B1/S1]. Measure resistance between the HO2S terminals 3 and 4 [B1/S2].
4. Check that the resistance is within the specification.

Specification: Refer to " SPECIFICATION "

Scheme 116

Scheme 117

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]

Scheme 118

Scheme 119

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 "

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 "

Scheme 120

Scheme 121

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-419419-S38936600032011091200000) " in this group). 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. Disconnect the injector connector (A).
4. Remove the wiring harness bracket installation bolt (B).
5. Remove the installation nut, and then disconnect the fuel feed tube (C).
6. Remove the installation bolt (D), and then remove the delivery pipe & injector assembly from the engine.
7. Remove the fixing clip (A), and then separate the injector 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 "

Scheme 122

Scheme 123

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 valve from the bracket in the direction of the arrow.

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 "