RM38T0EC _51 Engine / Hybrid System _144956 M20F-FXS, M20G-FXS ENGINE CONTROL _0604911 SFI SYSTEM J

M20F-FXS, M20G-FXS ENGINE CONTROL  SFI SYSTEM  VC Output Circuit  


DESCRIPTION

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

A487334E01
1.344,0.833 3.156,1.135 1.813,0.302 10 false from EFI NO. 1 Fuse 1.271,1.177 3.031,1.531 1.76,0.354 10 false from EFI-MAIN Relay 0.135,1.969 2.625,2.469 2.49,0.5 10 false to Throttle Position Sensor, Accelerator Pedal Sensor Assembly, etc. (Sensors which have an IC) 0.135,2.688 2.573,3.125 2.438,0.438 10 false to Engine Coolant Temperature Sensor, etc. 4.969,3.094 5.313,3.406 0.344,0.313 10 false ECM 2.885,0.677 3.563,1 0.677,0.323 10 false BATT 2.823,1.042 3.49,1.292 0.667,0.25 10 false +B, +B2 3.063,2.021 3.427,2.25 0.365,0.229 10 false VC 4.396,0.875 6.188,1.229 1.792,0.354 10 false 5 V Constant Voltage Circuit 5.365,1.76 6.354,2.115 0.99,0.354 10 false Microprocessor 4.073,2.844 4.333,3.063 0.26,0.219 10 false R

When the VC circuit has a short circuit, the microprocessor in the ECM and sensors that are supplied power through the VC circuit are deactivated because power is not supplied from the VC circuit. When the system is in this condition, it will not start.

WIRING DIAGRAM

·

For the circuit diagram of the ECM power source refer to the ECM power source circuit.

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>ECM Power Source Circuit

·

VC Output Circuit

A434316E03
0.552,0.49 2.063,0.958 1.51,0.469 10 false Throttle Body with Motor Assembly 0.552,0.281 2.063,0.75 1.51,0.469 10 false C19 0.531,1.875 2.042,2.344 1.51,0.469 10 false Z4 0.531,2.042 2.271,2.531 1.74,0.49 10 false Crankshaft Position Sensor 0.531,3.323 2.167,3.833 1.635,0.51 10 false Camshaft Position Sensor (for Intake Camshaft) 0.542,3.135 2.052,3.604 1.51,0.469 10 false C9 0.531,4.615 2.167,5.125 1.635,0.51 10 false Camshaft Position Sensor (for Exhaust Camshaft) 0.531,4.448 2.042,4.917 1.51,0.469 10 false C11 0.552,5.906 2.26,6.427 1.708,0.521 10 false Manifold Absolute Pressure Sensor 0.552,5.74 2.063,6.208 1.51,0.469 10 false C21 0.563,7.208 2.094,7.938 1.531,0.729 10 false Engine Oil Pressure and Temperature Sensor 0.552,7.031 2.063,7.5 1.51,0.469 10 false C41 6.281,0.135 6.677,0.479 0.396,0.344 10 false 5 V 2.531,0.292 2.927,0.635 0.396,0.344 10 false VC 2.552,0.667 2.948,1.01 0.396,0.344 10 false E2 2.458,1.031 2.854,1.375 0.396,0.344 10 false VTA 2.417,1.396 2.813,1.74 0.396,0.344 10 false VTA2 2.365,1.906 2.76,2.25 0.396,0.344 10 false VCNE 2.49,2.271 2.885,2.615 0.396,0.344 10 false NE- 2.479,2.646 2.875,2.99 0.396,0.344 10 false NE+ 2.542,3.188 2.938,3.531 0.396,0.344 10 false VC 2.448,3.542 2.844,3.885 0.396,0.344 10 false VVI- 2.448,3.906 2.844,4.25 0.396,0.344 10 false VVI+ 2.479,4.5 2.875,4.844 0.396,0.344 10 false VC2 2.406,4.854 2.802,5.198 0.396,0.344 10 false VVE- 2.385,5.24 2.781,5.583 0.396,0.344 10 false VVE+ 2.531,5.771 2.927,6.115 0.396,0.344 10 false VC 2.51,6.51 2.906,6.854 0.396,0.344 10 false PIM 2.563,6.135 2.958,6.479 0.396,0.344 10 false E2 2.552,7.021 2.948,7.365 0.396,0.344 10 false VC 2.438,7.385 2.833,7.729 0.396,0.344 10 false GND 2.375,7.75 2.823,8.094 0.448,0.344 10 false POUT 2.865,0.177 3.26,0.521 0.396,0.344 10 false 2 2.865,0.552 3.26,0.896 0.396,0.344 10 false 4 2.854,0.927 3.25,1.271 0.396,0.344 10 false 1 2.854,1.281 3.25,1.625 0.396,0.344 10 false 3 2.854,1.792 3.25,2.135 0.396,0.344 10 false 3 2.854,2.156 3.25,2.5 0.396,0.344 10 false 2 2.854,2.521 3.25,2.865 0.396,0.344 10 false 1 2.854,3.063 3.25,3.406 0.396,0.344 10 false 3 2.854,3.438 3.25,3.781 0.396,0.344 10 false 2 2.844,3.813 3.24,4.156 0.396,0.344 10 false 1 2.854,4.365 3.25,4.708 0.396,0.344 10 false 3 2.854,4.74 3.25,5.083 0.396,0.344 10 false 2 2.854,5.115 3.25,5.458 0.396,0.344 10 false 1 2.854,5.646 3.25,5.99 0.396,0.344 10 false 3 2.844,6.031 3.24,6.375 0.396,0.344 10 false 1 2.854,6.375 3.25,6.719 0.396,0.344 10 false 2 2.844,6.906 3.24,7.25 0.396,0.344 10 false 3 2.854,7.271 3.25,7.615 0.396,0.344 10 false 2 2.854,7.635 3.25,7.979 0.396,0.344 10 false 1 4.844,0.292 5.24,0.635 0.396,0.344 10 false C141 4.844,0.667 5.24,1.01 0.396,0.344 10 false C141 4.844,1.021 5.24,1.365 0.396,0.344 10 false C141 4.844,1.385 5.24,1.729 0.396,0.344 10 false C141 4.844,1.896 5.24,2.24 0.396,0.344 10 false C141 4.854,2.26 5.25,2.604 0.396,0.344 10 false C141 4.844,2.625 5.24,2.969 0.396,0.344 10 false C141 4.844,3.167 5.24,3.51 0.396,0.344 10 false C141 4.844,3.531 5.24,3.875 0.396,0.344 10 false C141 4.844,3.896 5.24,4.24 0.396,0.344 10 false C141 4.833,4.49 5.229,4.833 0.396,0.344 10 false C141 4.844,5.76 5.24,6.104 0.396,0.344 10 false C141 4.844,4.854 5.24,5.198 0.396,0.344 10 false C141 4.833,5.219 5.229,5.563 0.396,0.344 10 false C141 4.844,6.125 5.24,6.469 0.396,0.344 10 false C141 4.833,6.49 5.229,6.833 0.396,0.344 10 false C141 4.833,7.01 5.229,7.354 0.396,0.344 10 false C141 4.844,7.375 5.24,7.719 0.396,0.344 10 false C141 4.844,7.74 5.24,8.083 0.396,0.344 10 false C141 4.885,0.104 5.281,0.448 0.396,0.344 10 false 109 4.896,0.5 5.292,0.844 0.396,0.344 10 false 110 4.896,0.854 5.292,1.198 0.396,0.344 10 false 108 4.938,1.219 5.333,1.563 0.396,0.344 10 false 87 4.896,1.729 5.292,2.073 0.396,0.344 10 false 116 4.896,2.104 5.292,2.448 0.396,0.344 10 false 115 4.938,2.469 5.333,2.813 0.396,0.344 10 false 93 4.938,2.99 5.333,3.333 0.396,0.344 10 false 88 4.938,3.365 5.333,3.708 0.396,0.344 10 false 89 4.938,3.74 5.333,4.083 0.396,0.344 10 false 90 4.896,4.323 5.292,4.667 0.396,0.344 10 false 113 4.896,4.698 5.292,5.042 0.396,0.344 10 false 114 4.938,5.052 5.333,5.396 0.396,0.344 10 false 91 4.896,5.594 5.292,5.938 0.396,0.344 10 false 121 4.885,5.969 5.281,6.313 0.396,0.344 10 false 119 4.896,6.333 5.292,6.677 0.396,0.344 10 false 120 4.938,6.833 5.333,7.177 0.396,0.344 10 false 99 4.896,7.208 5.292,7.552 0.396,0.344 10 false 100 4.896,7.573 5.292,7.917 0.396,0.344 10 false 122 5.281,0.208 5.677,0.552 0.396,0.344 10 false VCTA 5.292,0.563 5.688,0.906 0.396,0.344 10 false ETA 5.292,1.021 5.688,1.365 0.396,0.344 10 false VTA1 5.302,1.396 5.698,1.74 0.396,0.344 10 false VTA2 5.281,1.802 5.677,2.146 0.396,0.344 10 false VCNE 5.281,2.177 5.677,2.521 0.396,0.344 10 false NE- 5.292,2.656 5.688,3 0.396,0.344 10 false NE+ 5.281,3.083 5.677,3.427 0.396,0.344 10 false VCV1 5.292,3.448 5.688,3.792 0.396,0.344 10 false VV1- 5.292,3.917 5.688,4.26 0.396,0.344 10 false VV1+ 5.292,4.396 5.688,4.74 0.396,0.344 10 false VCE1 5.302,4.76 5.698,5.104 0.396,0.344 10 false EV1- 5.292,5.24 5.688,5.583 0.396,0.344 10 false EV1+ 5.292,5.667 5.927,6.01 0.635,0.344 10 false VCPM 5.292,6.5 5.688,6.844 0.396,0.344 10 false PIM 5.292,6.042 5.688,6.385 0.396,0.344 10 false EPIM 5.292,6.927 5.906,7.292 0.615,0.365 10 false VCPE 5.302,7.76 5.698,8.104 0.396,0.344 10 false PEO 5.302,7.281 5.823,7.573 0.521,0.292 10 false EPEO 5.74,8.5 6.135,8.844 0.396,0.344 10 false ECM 5.281,8.104 5.677,8.448 0.396,0.344 10 false THEO 4.844,8.104 5.24,8.448 0.396,0.344 10 false C141 4.896,7.938 5.292,8.281 0.396,0.344 10 false 123 2.385,8.115 2.833,8.458 0.448,0.344 10 false TOUT 2.854,8 3.25,8.344 0.396,0.344 10 false 4

A450676E13
5.74,8.458 6.26,8.781 0.521,0.323 10 false ECM 0.615,0.802 1.073,1 0.458,0.198 10 false C26 0.615,1 1.938,1.26 1.323,0.26 10 false Mass Air Flow Meter 2.5,0.781 2.813,0.979 0.313,0.198 10 false VCC 2.875,0.698 3.031,0.896 0.156,0.198 10 false 4 2.5,1.146 2.958,1.344 0.458,0.198 10 false E2G 2.875,1.052 3.031,1.25 0.156,0.198 10 false 2 2.583,1.531 2.896,1.729 0.313,0.198 10 false FG 2.875,1.406 3.031,1.604 0.156,0.198 10 false 3 2.51,1.865 2.969,2.063 0.458,0.198 10 false THA 2.875,1.771 3.031,1.969 0.156,0.198 10 false 1 4.938,0.625 5.25,0.823 0.313,0.198 10 false 78 5.313,0.708 5.927,0.906 0.615,0.198 10 false VCVG 4.969,0.99 5.281,1.188 0.313,0.198 10 false 79 5.333,1.073 5.792,1.271 0.458,0.198 10 false E2G 4.927,1.344 5.385,1.542 0.458,0.198 10 false 101 5.302,1.521 5.615,1.719 0.313,0.198 10 false VG 4.917,1.719 5.375,1.917 0.458,0.198 10 false 102 5.302,1.896 5.76,2.094 0.458,0.198 10 false THA 4.875,0.792 5.49,0.99 0.615,0.198 10 false C141 4.875,1.156 5.49,1.354 0.615,0.198 10 false C141 4.875,1.521 5.49,1.719 0.615,0.198 10 false C141 4.875,1.885 5.49,2.083 0.615,0.198 10 false C141 0.646,2.406 0.958,2.604 0.313,0.198 10 false Z3 0.646,2.594 2.229,3.104 1.583,0.51 10 false Fuel Pressure Sensor (for High Pressure Side) 2.583,2.406 3.115,2.625 0.531,0.219 10 false VC 2.875,2.302 3.031,2.5 0.156,0.198 10 false 1 2.594,2.792 2.906,2.99 0.313,0.198 10 false E2 2.885,2.677 3.042,2.875 0.156,0.198 10 false 2 2.573,3.146 2.885,3.344 0.313,0.198 10 false PR 2.885,3.052 3.042,3.25 0.156,0.198 10 false 3 4.948,2.25 5.26,2.448 0.313,0.198 10 false 98 5.323,2.323 5.938,2.521 0.615,0.198 10 false VCPR 4.948,2.625 5.26,2.823 0.313,0.198 10 false 96 5.323,2.708 5.781,2.906 0.458,0.198 10 false EPR 4.969,2.979 5.281,3.177 0.313,0.198 10 false 97 5.313,3.167 5.625,3.365 0.313,0.198 10 false PR 4.875,3.146 5.49,3.344 0.615,0.198 10 false C141 4.865,2.781 5.479,2.979 0.615,0.198 10 false C141 4.875,2.417 5.49,2.615 0.615,0.198 10 false C141 0.615,3.677 1.073,3.875 0.458,0.198 10 false F5 0.604,3.844 2.208,4.292 1.604,0.448 10 false Fuel Pressure Sensor (for Low Pressure Side) 2.573,3.688 2.885,3.885 0.313,0.198 10 false VC 2.885,3.583 3.042,3.781 0.156,0.198 10 false 1 2.594,4.073 2.906,4.271 0.313,0.198 10 false E2 2.885,3.958 3.042,4.156 0.156,0.198 10 false 3 2.51,4.396 2.969,4.594 0.458,0.198 10 false PFL 2.885,4.313 3.042,4.51 0.156,0.198 10 false 2 4.948,3.5 5.26,3.698 0.313,0.198 10 false 84 5.302,3.625 5.917,3.823 0.615,0.198 10 false VCPF 4.958,3.896 5.271,4.094 0.313,0.198 10 false 61 5.302,3.958 5.917,4.156 0.615,0.198 10 false EPFL 4.917,4.26 5.375,4.458 0.458,0.198 10 false 107 5.302,4.417 5.76,4.615 0.458,0.198 10 false PFL 4.875,3.688 5.49,3.885 0.615,0.198 10 false C141 4.875,4.063 5.49,4.26 0.615,0.198 10 false C141 4.875,4.427 5.49,4.625 0.615,0.198 10 false C141 0.625,6.208 1.083,6.406 0.458,0.198 10 false S18 0.625,6.375 2.385,6.865 1.76,0.49 10 false Canister Pressure Sensor 2.49,6.208 2.948,6.406 0.458,0.198 10 false VCC 2.875,6.104 3.031,6.302 0.156,0.198 10 false 6 2.375,6.573 2.99,6.771 0.615,0.198 10 false SGND 2.875,6.458 3.031,6.656 0.156,0.198 10 false 8 2.396,6.927 3.01,7.125 0.615,0.198 10 false VOUT 2.875,6.823 3.031,7.021 0.156,0.198 10 false 7 4.938,6.042 5.25,6.24 0.313,0.198 10 false 48 5.313,6.156 5.927,6.354 0.615,0.198 10 false VCPP 4.948,6.417 5.26,6.615 0.313,0.198 10 false 49 5.302,6.49 5.917,6.688 0.615,0.198 10 false EPPM 4.958,6.781 5.271,6.979 0.313,0.198 10 false 50 5.302,6.979 5.917,7.177 0.615,0.198 10 false PPMP 4.917,6.219 5.375,6.417 0.458,0.198 10 false A47 4.917,6.583 5.375,6.781 0.458,0.198 10 false A47 4.917,6.948 5.375,7.146 0.458,0.198 10 false A47 0.615,4.938 1.073,5.135 0.458,0.198 10 false O226 0.625,5.115 2.573,5.427 1.948,0.313 10 false Fuel Tank Pressure Sensor 5.302,4.833 5.917,5.031 0.615,0.198 10 false VPTK 5.302,5.229 5.917,5.427 0.615,0.198 10 false EPTK 5.302,5.688 5.917,5.885 0.615,0.198 10 false PTNK 4.958,4.771 5.271,4.969 0.313,0.198 10 false 57 4.948,5.146 5.26,5.344 0.313,0.198 10 false 56 4.958,5.521 5.271,5.719 0.313,0.198 10 false 55 4.917,4.958 5.375,5.156 0.458,0.198 10 false A47 4.917,5.313 5.375,5.51 0.458,0.198 10 false A47 4.917,5.677 5.375,5.875 0.458,0.198 10 false A47 2.573,4.948 2.885,5.146 0.313,0.198 10 false VC 2.573,5.302 2.885,5.5 0.313,0.198 10 false E2 2.427,5.656 3.042,5.854 0.615,0.198 10 false PTNK 2.896,4.823 3.052,5.021 0.156,0.198 10 false 3 2.885,5.563 3.042,5.76 0.156,0.198 10 false 2 2.885,5.219 3.042,5.417 0.156,0.198 10 false 1 0.583,7.417 1.198,7.615 0.615,0.198 10 false C140 0.583,7.594 2.969,8.073 2.385,0.479 10 false Differential Pressure Sensor 2.594,7.427 2.906,7.625 0.313,0.198 10 false VC 2.875,7.313 3.031,7.51 0.156,0.198 10 false 3 2.51,8.146 2.969,8.344 0.458,0.198 10 false PEX 2.875,8.031 3.031,8.229 0.156,0.198 10 false 2 4.875,7.406 5.333,7.604 0.458,0.198 10 false C141 4.969,7.229 5.281,7.427 0.313,0.198 10 false 69 5.323,7.323 5.938,7.521 0.615,0.198 10 false VCPX 4.958,7.99 5.271,8.188 0.313,0.198 10 false 92 4.875,8.146 5.333,8.344 0.458,0.198 10 false C141 5.344,8.177 5.802,8.375 0.458,0.198 10 false PEX 2.875,7.656 3.104,7.927 0.229,0.271 10 false 1 2.604,7.792 2.917,7.99 0.313,0.198 10 false E2 4.875,7.771 5.333,7.969 0.458,0.198 10 false C141 4.958,7.604 5.271,7.802 0.313,0.198 10 false 68 5.313,7.677 5.927,7.875 0.615,0.198 10 false EPEX


CAUTION / NOTICE / HINT

NOTICE:

Check the fuses for circuits related to this system before performing the following inspection procedure.


PROCEDURE

1.CHECK CONNECTION BETWEEN GTS AND ECM
a.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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




A

2.CHECK EFI NO. 2 FUSE VOLTAGE

B

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>PROBLEM SYMPTOMS TABLE


2.CHECK EFI NO. 2 FUSE VOLTAGE
a.

Turn the ignition switch to ON.


b.

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

Standard Voltage:
Tester Connection Condition Specified Condition
1 (EFI NO. 2 fuse) - Body ground Ignition switch ON 11 to 14 V


HINT:
·

Check the fuse with it installed to the No. 1 engine room relay block.

·

If the result is not as specified, since current is not flowing to the +B and +B2 terminals of the ECM, the system may not be started.




Result:
Proceed to
OK
NG



OK

3.CHECK CONNECTION BETWEEN GTS AND ECM (THROTTLE POSITION SENSOR)

NG

GO TO ECM POWER SOURCE CIRCUIT

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>ECM Power Source Circuit


3.CHECK CONNECTION BETWEEN GTS AND ECM (THROTTLE POSITION SENSOR)
a.

Disconnect the throttle body with motor assembly connector.


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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



HINT:

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

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION



A

4.CHECK CONNECTION BETWEEN GTS AND ECM (CRANKSHAFT POSITION SENSOR)

B

REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>THROTTLE BODY>REMOVAL


4.CHECK CONNECTION BETWEEN GTS AND ECM (CRANKSHAFT POSITION SENSOR)
a.

Disconnect the crankshaft position sensor connector.


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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




A

5.CHECK CONNECTION BETWEEN GTS AND ECM (CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT))

B

REPLACE CRANKSHAFT POSITION SENSOR

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>CRANKSAFT POSITION SENSOR>REMOVAL


5.CHECK CONNECTION BETWEEN GTS AND ECM (CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT))
a.

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


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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




A

6.CHECK CONNECTION BETWEEN GTS AND ECM (MANIFOLD ABSOLUTE PRESSURE SENSOR)

B

REPLACE CAMSHAFT POSITION SENSOR (FOR INTAKE CAMSHAFT)

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>CAMSHAFT POSITION SENSOR>REMOVAL


6.CHECK CONNECTION BETWEEN GTS AND ECM (MANIFOLD ABSOLUTE PRESSURE SENSOR)
a.

Disconnect the manifold absolute pressure sensor connector.


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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




A

7.CHECK CONNECTION BETWEEN GTS AND ECM (CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT))

B

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (EMISSION CONTROL)>VACUUM SENSOR>REMOVAL


7.CHECK CONNECTION BETWEEN GTS AND ECM (CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT))
a.

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


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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




A

8.CHECK CONNECTION BETWEEN GTS AND ECM (ENGINE OIL PRESSURE AND TEMPERATURE SENSOR)

B

REPLACE CAMSHAFT POSITION SENSOR (FOR EXHAUST CAMSHAFT)

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>CAMSHAFT POSITION SENSOR>REMOVAL


8.CHECK CONNECTION BETWEEN GTS AND ECM (ENGINE OIL PRESSURE AND TEMPERATURE SENSOR)
a.

Disconnect the engine oil pressure and temperature sensor connector.


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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




A

9.CHECK CONNECTION BETWEEN GTS AND ECM (FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE))

B

REPLACE ENGINE OIL PRESSURE AND TEMPERATURE SENSOR

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (LUBRICATION)>OIL PRESSURE AND TEMPERATURE SENSOR>REMOVAL


9.CHECK CONNECTION BETWEEN GTS AND ECM (FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE))
a.

Disconnect the fuel pressure sensor (for high pressure side) connector.


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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



HINT:

Perform "Inspection After Repair" after replacing the fuel pressure sensor (for high pressure side).

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION



A

10.CHECK CONNECTION BETWEEN GTS AND ECM (FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE))

B

REPLACE FUEL PRESSURE SENSOR (FOR HIGH PRESSURE SIDE)

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (FUEL)>FUEL PRESSURE SENSOR (for High Pressure)>REMOVAL


10.CHECK CONNECTION BETWEEN GTS AND ECM (FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE))
a.

Disconnect the fuel pressure sensor (for low pressure side) connector.


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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



HINT:

Perform "Inspection After Repair" after replacing the fuel pressure sensor (for low pressure side).

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION



A

11.CHECK CONNECTION BETWEEN GTS AND ECM (MASS AIR FLOW METER)

B

REPLACE FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (FUEL)>FUEL PRESSURE SENSOR>REMOVAL


11.CHECK CONNECTION BETWEEN GTS AND ECM (MASS AIR FLOW METER)
a.

Disconnect the mass air flow meter connector.


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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



HINT:

Perform "Inspection After Repair" after replacing the mass air flow meter.

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>SFI SYSTEM>INITIALIZATION



A

12.CHECK CONNECTION BETWEEN GTS AND ECM (CANISTER PUMP MODULE)

B

REPLACE MASS AIR FLOW METER

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>MASS AIR FLOW METER>REMOVAL


12.CHECK CONNECTION BETWEEN GTS AND ECM (CANISTER PUMP MODULE)
a.

Disconnect the canister pump module connector.


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.


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




A

13.CHECK CONNECTION BETWEEN GTS AND ECM (FUEL TANK PRESSURE SENSOR)

B

REPLACE CANISTER PUMP MODULE

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (EMISSION CONTROL)>CANISTER>REMOVAL


13.CHECK CONNECTION BETWEEN GTS AND ECM (FUEL TANK PRESSURE SENSOR)
a.

Disconnect the fuel tank pressure sensor connector.


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.



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



A

14.CHECK CONNECTION BETWEEN GTS AND ECM (DIFFERENTIAL PRESSURE SENSOR)

B

REPLACE FUEL TANK PRESSURE SENSOR

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (EMISSION CONTROL)>FUEL TANK PRESSURE SENSOR>REMOVAL


14.CHECK CONNECTION BETWEEN GTS AND ECM (DIFFERENTIAL PRESSURE SENSOR)
a.

Disconnect the differential pressure sensor connector.


b.

Check the communication between the GTS and ECM.

HINT:

It can be checked using the "Engine" item of the Data List.



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



A

15.CHECK HARNESS AND CONNECTOR

B

REPLACE DIFFERENTIAL PRESSURE SENSOR

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (EMISSION CONTROL)>DIFFERENTIAL PRESSURE SENSOR>REMOVAL


15.CHECK HARNESS AND CONNECTOR
a.

Disconnect the throttle body with motor assembly connector.


b.

Disconnect the crankshaft position sensor connector.


c.

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


d.

Disconnect the manifold absolute pressure sensor connector.


e.

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


f.

Disconnect the engine oil pressure and temperature sensor connector.


g.

Disconnect the fuel pressure sensor (for high pressure side) connector.


h.

Disconnect the fuel pressure sensor (for low pressure side) connector.


i.

Disconnect the mass air flow meter connector.


j.

Disconnect the canister pump module connector.


k.

Disconnect the fuel tank pressure sensor connector.


l.

Disconnect the differential pressure sensor connector.


m.

Disconnect the ECM connectors.


n.

Remove the EFI NO. 2 fuse from the No. 1 engine room relay block.


o.

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

Standard Resistance:
Tester Connection Condition Specified Condition
C141-109 (VCTA) - Body ground Always 10 kΩ or higher
C141-116 (VCNE) - Body ground Always 10 kΩ or higher
C141-88 (VCV1) - Body ground Always 10 kΩ or higher
C141-113 (VCE1) - Body ground Always 10 kΩ or higher
C141-121 (VCPM) - Body ground Always 10 kΩ or higher
C141-99 (VCPE) - Body ground Always 10 kΩ or higher
C141-78 (VCVG) - Body ground Always 10 kΩ or higher
C141-98 (VCPR) - Body ground Always 10 kΩ or higher
C141-84 (VCPF) - Body ground Always 10 kΩ or higher
A47-48 (VCPP) - Body ground Always 10 kΩ or higher
A47-57 (VPTK) - Body ground Always 10 kΩ or higher
C141-69 (VCPX) - Body ground Always 10 kΩ or higher
A47-9 (+B) - 1 (EFI NO. 2 fuse) Always Below 1 Ω
A47-35 (+B2) - 1 (EFI NO. 2 fuse) Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

REPLACE ECM

Click hereEngine / Hybrid System>M20F-FXS, M20G-FXS (ENGINE CONTROL)>ECM>REMOVAL


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR