2ZR-FE ENGINE CONTROL  SFI SYSTEM  VC Output Circuit  


DESCRIPTION

The ECM constantly generates a 5 V power source voltage from the battery voltage supplied to the +B, +B2 (BATT) terminal to operate the microprocessor. The ECM also provides this power source voltage to the sensors through the VC output circuit.

A206916E40
4.375,1.177 6.198,1.354 1.823,0.177 10 false 5 V Constant Voltage Circuit 5.354,2.031 6.365,2.188 1.01,0.156 10 false Microprocessor 1.125,1.125 2.677,1.354 1.552,0.229 10 false from ECU-B NO. 3 Fuse 1.333,1.479 2.729,1.667 1.396,0.188 10 false from EFI NO. 1 Fuse 2.906,1 3.427,1.219 0.521,0.219 10 false BATT 0.313,2.135 2.635,2.677 2.323,0.542 10 false Throttle Position Sensor, Accelerator Pedal Position Sensor, etc. (Sensors which have IC) 0.313,3.021 2.677,3.448 2.365,0.427 10 false Engine Coolant Temperature Sensor, Intake Air Temperature Sensor, etc. 4.073,3.115 4.333,3.323 0.26,0.208 10 false R 2.813,1.354 3.375,1.552 0.563,0.198 10 false +B, +B2 3.167,2.271 3.458,2.5 0.292,0.229 10 false VC 4.885,3.333 5.229,3.51 0.344,0.177 10 false ECM

When the VC circuit is short-circuited, the microprocessor in the ECM and the sensors that are supplied with power through the VC circuit are inactivated because power is not supplied from the VC circuit. Under this condition, the system does not start up and the MIL does not illuminate even if the system malfunctions.

HINT:

Under normal conditions, the MIL is illuminated when the ignition switch is turned to ON. The MIL goes off when the engine is started.


WIRING DIAGRAM

A282859E24
5.333,0.99 5.917,1.219 0.583,0.229 10 false ETA 5.323,1.833 6.094,2.229 0.771,0.396 10 false VTA2 5.323,1.458 5.906,1.677 0.583,0.219 10 false VTA1 5.323,0.625 6.083,0.927 0.76,0.302 10 false VCTA 5.323,2.219 6.01,2.479 0.688,0.26 10 false VCPA 5.333,4.031 5.875,4.271 0.542,0.24 10 false EPA2 5.323,3.417 5.948,3.688 0.625,0.271 10 false VPA2 5.323,2.583 6.083,2.854 0.76,0.271 10 false VCP2 5.333,3.667 5.729,3.854 0.396,0.188 10 false EPA 5.323,3.052 5.896,3.344 0.573,0.292 10 false VPA 5,2.292 5.448,2.479 0.448,0.188 10 false A40 5.042,2.115 5.479,2.396 0.438,0.281 10 false 49 5,3.021 5.417,3.313 0.417,0.292 10 false A40 5.042,2.854 5.344,3.083 0.302,0.229 10 false 47 4.99,3.75 5.396,3.99 0.406,0.24 10 false A40 5.042,3.583 5.375,3.802 0.333,0.219 10 false 48 5,2.656 5.458,2.917 0.458,0.26 10 false A40 5.042,2.49 5.375,2.729 0.333,0.24 10 false 52 5,3.385 5.448,3.698 0.448,0.313 10 false A40 5.052,3.208 5.479,3.49 0.427,0.281 10 false 50 5,4.115 5.406,4.417 0.406,0.302 10 false A40 5.042,3.938 5.354,4.115 0.313,0.177 10 false 51 5.802,7.448 6.177,7.667 0.375,0.219 10 false ECM 1.813,2.323 2.406,2.573 0.594,0.25 10 false VCPA 1.844,4.125 2.396,4.417 0.552,0.292 10 false EPA2 1.833,3.396 2.417,3.667 0.583,0.271 10 false VPA2 1.823,2.667 2.385,2.927 0.563,0.26 10 false VCP2 1.917,3.771 2.552,4.094 0.635,0.323 10 false EPA 1.906,3.042 2.458,3.292 0.552,0.25 10 false VPA 2.292,3.958 2.719,4.313 0.427,0.354 10 false 2 2.292,3.24 2.677,3.479 0.385,0.24 10 false 3 2.292,2.51 2.615,2.75 0.323,0.24 10 false 1 2.292,3.583 2.573,3.875 0.281,0.292 10 false 5 2.292,2.865 2.521,3.135 0.229,0.271 10 false 6 2.292,2.156 2.531,2.479 0.24,0.323 10 false 4 0.531,2.594 1.656,3.167 1.125,0.573 10 false Accelerator Pedal Sensor Assembly 0.542,2.438 1.094,2.74 0.552,0.302 10 false A2 1.99,0.729 2.406,0.99 0.417,0.26 10 false VC 2.01,1.073 2.385,1.354 0.375,0.281 10 false E2 1.906,1.448 2.385,1.75 0.479,0.302 10 false VTA 1.833,1.781 2.375,2.031 0.542,0.25 10 false VTA2 2.292,0.552 2.688,0.865 0.396,0.313 10 false 5 2.292,0.917 2.552,1.198 0.26,0.281 10 false 3 2.292,1.271 2.656,1.625 0.365,0.354 10 false 6 2.292,1.646 2.521,1.906 0.229,0.26 10 false 4 0.531,0.854 1.385,1.542 0.854,0.688 10 false Throttle Body Assembly 0.552,0.698 1.073,1.01 0.521,0.313 10 false B24 4.979,0.698 5.375,0.917 0.396,0.219 10 false B64 4.979,0.542 5.385,0.781 0.406,0.24 10 false 134 5,1.271 5.49,1.604 0.49,0.333 10 false 135 5,1.635 5.323,1.865 0.323,0.229 10 false 101 4.979,1.063 5.365,1.271 0.385,0.208 10 false B64 4.979,0.896 5.5,1.24 0.521,0.344 10 false 133 6.344,0.344 6.677,0.583 0.333,0.24 10 false 5 V 5,4.75 5.438,5.063 0.438,0.313 10 false B64 0.51,6 0.885,6.385 0.375,0.385 10 false B20 0.5,6.156 1.76,6.813 1.26,0.656 10 false Camshaft Position Sensor (for Exhaust Camshaft) 5.344,6.969 5.719,7.156 0.375,0.188 10 false EV1+ 5.344,6.5 5.802,6.792 0.458,0.292 10 false EV1- 5.031,6.771 5.396,7.021 0.365,0.25 10 false 80 5,6.406 5.427,6.625 0.427,0.219 10 false 112 5.333,5.5 5.906,5.76 0.573,0.26 10 false VV1+ 2.292,6.427 2.552,6.708 0.26,0.281 10 false 2 2.292,6.771 2.625,7.073 0.333,0.302 10 false 1 2.292,6.063 2.698,6.396 0.406,0.333 10 false 3 2.292,5.021 2.448,5.25 0.156,0.229 10 false 2 2.292,5.396 2.698,5.719 0.406,0.323 10 false 1 2.292,4.594 2.552,4.927 0.26,0.333 10 false 3 5.323,6.135 5.875,6.406 0.552,0.271 10 false VCE1 4.99,6.031 5.375,6.24 0.385,0.208 10 false 111 5.052,5.292 5.375,5.5 0.323,0.208 10 false 82 5,4.927 5.417,5.177 0.417,0.25 10 false 115 5,4.563 5.521,4.885 0.521,0.323 10 false 116 5.323,5.042 5.792,5.26 0.469,0.219 10 false VV1- 5.323,4.667 5.875,4.906 0.552,0.24 10 false VCV1 0.5,4.563 1.021,4.885 0.521,0.323 10 false B21 0.5,4.729 1.646,5.344 1.146,0.615 10 false Camshaft Position Sensor (for Intake Camshaft) 1.885,5.5 2.385,5.802 0.5,0.302 10 false VVI+ 1.885,5.125 2.448,5.427 0.563,0.302 10 false VVI- 1.979,4.76 2.313,5.01 0.333,0.25 10 false VC 1.844,6.948 2.448,7.26 0.604,0.313 10 false VVE+ 1.844,6.583 2.583,6.802 0.74,0.219 10 false VVE- 1.906,6.208 2.406,6.417 0.5,0.208 10 false VC2 4.99,1.427 5.375,1.635 0.385,0.208 10 false B64 4.99,1.792 5.375,2 0.385,0.208 10 false B64 4.99,5.104 5.427,5.417 0.438,0.313 10 false B64 4.99,5.469 5.427,5.781 0.438,0.313 10 false B64 4.99,6.208 5.427,6.521 0.438,0.313 10 false B64 4.99,6.573 5.427,6.885 0.438,0.313 10 false B64 4.99,6.938 5.427,7.25 0.438,0.313 10 false B64

A349515E14
0.51,0.479 1.896,0.781 1.385,0.302 10 false B62 0.51,0.677 1.896,0.979 1.385,0.302 10 false Vacuum Sensor 0.521,2.073 1.906,2.375 1.385,0.302 10 false B29 0.521,2.292 1.906,2.594 1.385,0.302 10 false Oil Pressure Sensor* 5.813,3.406 6.865,3.688 1.052,0.281 10 false ECM 1.979,0.583 3.031,0.865 1.052,0.281 10 false VC 1.979,0.948 3.031,1.229 1.052,0.281 10 false E2 1.927,1.313 2.979,1.594 1.052,0.281 10 false PIM 1.979,2.104 3.031,2.385 1.052,0.281 10 false VC 2,2.469 3.052,2.75 1.052,0.281 10 false E2 1.896,2.854 2.948,3.135 1.052,0.281 10 false PTO 4.948,0.594 6,0.875 1.052,0.281 10 false B64 5,0.375 6.052,0.656 1.052,0.281 10 false 77 4.99,0.771 6.042,1.052 1.052,0.281 10 false 76 4.979,1.135 6.031,1.417 1.052,0.281 10 false 78 4.948,1.927 6,2.208 1.052,0.281 10 false 110 4.948,2.302 6,2.583 1.052,0.281 10 false 109 4.99,2.677 5.49,3 0.5,0.323 10 false 79 5.313,0.479 6.365,0.76 1.052,0.281 10 false VC 5.333,0.854 6.385,1.135 1.052,0.281 10 false E2 5.333,1.323 6.385,1.604 1.052,0.281 10 false HAC 5.333,2.01 6.385,2.292 1.052,0.281 10 false VCPT* 5.344,2.375 6.396,2.656 1.052,0.281 10 false EPTO* 5.323,2.844 6.375,3.125 1.052,0.281 10 false PTO* 2.281,0.49 2.594,0.75 0.313,0.26 10 false 3 2.271,0.854 2.583,1.115 0.313,0.26 10 false 1 2.271,1.219 2.583,1.479 0.313,0.26 10 false 2 2.26,2.021 2.573,2.281 0.313,0.26 10 false 3 2.25,2.385 2.563,2.646 0.313,0.26 10 false 1 2.26,2.75 2.573,3.01 0.313,0.26 10 false 2 0.531,3.406 1.917,3.708 1.385,0.302 10 false *: for CVT Models 3.521,2.042 3.833,2.302 0.313,0.26 10 false * 3.531,2.417 3.844,2.677 0.313,0.26 10 false * 3.531,2.802 3.844,3.063 0.313,0.26 10 false * 4.958,0.948 6.01,1.229 1.052,0.281 10 false B64 4.938,1.313 5.99,1.594 1.052,0.281 10 false B64 4.948,2.115 6,2.396 1.052,0.281 10 false B64 4.958,2.479 6.01,2.76 1.052,0.281 10 false B64 4.948,2.865 6,3.146 1.052,0.281 10 false B64

PROCEDURE

1.CHECK MIL CONDITION
a.

Check that the Malfunction Indicator Lamp (MIL) lights up when the ignition switch is turned to ON.

OK:

MIL lights up.



Result:
Proceed to
OK
NG



OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>SFI SYSTEM>PROBLEM SYMPTOMS TABLE


NG

2.CHECK CONNECTION BETWEEN GTS AND ECM
2.CHECK CONNECTION BETWEEN GTS AND ECM
a.

Connect the GTS to the DLC3.


b.

Turn the ignition switch to ON.


c.

Turn the GTS on.


d.

Check for communication between the GTS and ECM.


Result:
Result Proceed to
Communication is not possible A
Communication is possible B



A

3.CHECK MIL (THROTTLE POSITION SENSOR)

B

GO TO MIL CIRCUIT

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>SFI SYSTEM>MIL Circuit


3.CHECK MIL (THROTTLE POSITION SENSOR)
a.

Disconnect the throttle body assembly connector.


b.

Turn the ignition switch to ON.


c.

Check the MIL.

Result:
Result Proceed to
MIL does not illuminate A
MIL illuminates B


HINT:

Perform "Inspection After Repair" after replacing the throttle body assembly.

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>SFI SYSTEM>INITIALIZATION




A

4.CHECK MIL (ACCELERATOR PEDAL SENSOR ASSEMBLY)

B

REPLACE THROTTLE BODY ASSEMBLY

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>THROTTLE BODY>REMOVAL


4.CHECK MIL (ACCELERATOR PEDAL SENSOR ASSEMBLY)
a.

Disconnect the accelerator pedal sensor assembly connector.


b.

Turn the ignition switch to ON.


c.

Check the MIL.


Result:
Result Proceed to
MIL does not illuminate A
MIL illuminates B



A

5.CHECK MIL (CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT))

B

REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>ACCELERATOR PEDAL>REMOVAL


5.CHECK MIL (CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT))
a.

Disconnect the camshaft position sensor (for intake camshaft) connector.


b.

Turn the ignition switch to ON.


c.

Check the MIL.


Result:
Result Proceed to
MIL does not illuminate A
MIL illuminates B



A

6.CHECK MIL (VACUUM SENSOR)

B

REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT)

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>CAMSHAFT POSITION SENSOR>REMOVAL


6.CHECK MIL (VACUUM SENSOR)
a.

Disconnect the vacuum sensor connector.


b.

Turn the ignition switch to ON.


c.

Check the MIL.


Result:
Result Proceed to
MIL does not illuminate A
MIL illuminates B



A

7.CHECK MIL (CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT))

B

REPLACE VACUUM SENSOR

Click hereEngine / Hybrid System>2ZR-FE EMISSION CONTROL>VACUUM SENSOR>REMOVAL


7.CHECK MIL (CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT))
a.

Disconnect the camshaft position sensor (for exhaust camshaft) connector.


b.

Turn the ignition switch to ON.


c.

Check the MIL.


Result:
Result Proceed to
MIL does not illuminate (for CVT Models) A
MIL does not illuminate (for M/T Models) B
MIL illuminates C



A

8.CHECK MIL (OIL PRESSURE SENSOR)

B

9.CHECK HARNESS AND CONNECTOR

C

REPLACE CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT)

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>CAMSHAFT POSITION SENSOR>REMOVAL


8.CHECK MIL (OIL PRESSURE SENSOR)
a.

Disconnect the oil pressure sensor connector.


b.

Turn the ignition switch to ON.


c.

Check the MIL.


Result:
Result Proceed to
MIL does not illuminate A
MIL illuminates B



A

9.CHECK HARNESS AND CONNECTOR

B

REPLACE OIL PRESSURE SENSOR

Click hereDrivetrain>K313 CVT>OIL PRESSURE SENSOR>REMOVAL


9.CHECK HARNESS AND CONNECTOR
a.

Disconnect the throttle body assembly connector.


b.

Disconnect the accelerator pedal sensor assembly connector.


c.

Disconnect the camshaft position sensor (for intake camshaft) connector.


d.

Disconnect the camshaft position sensor (for exhaust camshaft) connector.


e.

Disconnect the vacuum sensor connector.


f.

Disconnect the oil pressure sensor connector (for CVT Models).


g.

Disconnect the ECM connectors.


h.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition
B64-134 (VCTA) - Body ground Always 10 kΩ or higher
A40-49 (VCPA) - Body ground Always 10 kΩ or higher
A40-52 (VCP2) - Body ground Always 10 kΩ or higher
B64-116 (VCV1) - Body ground Always 10 kΩ or higher
B64-111 (VCE1) - Body ground Always 10 kΩ or higher
B64-77 (VC) - Body ground Always 10 kΩ or higher
B64-110 (VCPT)* - Body ground Always 10 kΩ or higher


*: for CVT Models


Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>2ZR-FE ENGINE CONTROL>ECM>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR