DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK MIL
CHECK COMMUNICATION BETWEEN GTS AND ECM
CHECK MIL (THROTTLE BODY WITH MOTOR ASSEMBLY)
CHECK MIL (ACCELERATOR PEDAL SENSOR ASSEMBLY)
CHECK MIL (NO. 1 EMISSION CONTROL VALVE SET)
CHECK MIL (NO. 2 EMISSION CONTROL VALVE SET)
CHECK MIL (VVT SENSOR [FOR INTAKE SIDE OF BANK 1])
CHECK MIL (VVT SENSOR [FOR INTAKE SIDE OF BANK 2])
CHECK MIL (VVT SENSOR [FOR EXHAUST SIDE OF BANK 1])
CHECK MIL (VVT SENSOR [FOR EXHAUST SIDE OF BANK 2])
CHECK MIL (POWER STEERING OIL PRESSURE SENSOR)
CHECK HARNESS AND CONNECTOR
SFI SYSTEM - VC Output Circuit
DESCRIPTION
The ECM constantly generates a 5 V power source voltage from the battery voltage supplied to the +B (BATT) terminal to operate the microprocessor. The ECM also provides this power source voltage to the sensors through the VC output circuit.
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 the 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.
- Under normal conditions, the MIL is illuminated for several seconds when the ignition switch is first turned to ON. The MIL goes off when the engine is started.
WIRING DIAGRAM
INSPECTION PROCEDURE
Check that the Malfunction Indicator Lamp (MIL) lights up when turning the ignition switch to ON.
Result| Result | Proceed to |
| MIL illuminates | A |
| MIL does not illuminate | B |
| 2.CHECK COMMUNICATION BETWEEN GTS AND ECM |
Connect the GTS to the DLC3.
Turn the ignition switch to ON and turn the GTS on.
Check the communication between the GTS and ECM.
Result| Result | Proceed to |
| Communication is possible | A |
| Communication is not possible | B |
| 3.CHECK MIL (THROTTLE BODY WITH MOTOR ASSEMBLY) |
Disconnect the throttle body with motor assembly connector.
Turn the ignition switch to ON.
Check the MIL.
Result| Result | Proceed to |
| MIL illuminates | A |
| MIL does not illuminate | B |
| | REPLACE THROTTLE BODY WITH MOTOR ASSEMBLY ()
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| 4.CHECK MIL (ACCELERATOR PEDAL SENSOR ASSEMBLY) |
Disconnect the accelerator pedal sensor assembly connector.
Turn the ignition switch to ON.
Check the MIL.
Result| Result | Proceed to |
| MIL illuminates | A |
| MIL does not illuminate | B |
| | REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY ()
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| 5.CHECK MIL (NO. 1 EMISSION CONTROL VALVE SET) |
Disconnect the No. 1 emission control valve set connector.
Turn the ignition switch to ON.
Check the MIL.
Result| Result | Proceed to |
| MIL illuminates | A |
| MIL does not illuminate | B |
| | REPLACE NO. 1 EMISSION CONTROL VALVE SET ()
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| 6.CHECK MIL (NO. 2 EMISSION CONTROL VALVE SET) |
Disconnect the No. 2 emission control valve set connector.
Turn the ignition switch to ON.
Check the MIL.
Result| Result | Proceed to |
| MIL illuminates | A |
| MIL does not illuminate | B |
| | REPLACE NO. 2 EMISSION CONTROL VALVE SET ()
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| 7.CHECK MIL (VVT SENSOR [FOR INTAKE SIDE OF BANK 1]) |
Disconnect the VVT sensor (for intake side of bank 1) connector.
Turn the ignition switch to ON.
Check the MIL.
Result| Result | Proceed to |
| MIL illuminates | A |
| MIL does not illuminate | B |
| | REPLACE VVT SENSOR (FOR INTAKE SIDE OF BANK 1) ()
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| 8.CHECK MIL (VVT SENSOR [FOR INTAKE SIDE OF BANK 2]) |
Disconnect the VVT sensor (for intake side of bank 2) connector.
Turn the ignition switch to ON.
Check the MIL.
Result| Result | Proceed to |
| MIL illuminates | A |
| MIL does not illuminate | B |
| | REPLACE VVT SENSOR (FOR INTAKE SIDE OF BANK 2) ()
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| 9.CHECK MIL (VVT SENSOR [FOR EXHAUST SIDE OF BANK 1]) |
Disconnect the VVT sensor (for exhaust side of bank 1) connector.
Turn the ignition switch to ON.
Check the MIL.
Result| Result | Proceed to |
| MIL illuminates | A |
| MIL does not illuminate | B |
| | REPLACE VVT SENSOR (FOR EXHAUST SIDE OF BANK 1) ()
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| 10.CHECK MIL (VVT SENSOR [FOR EXHAUST SIDE OF BANK 2]) |
Disconnect the VVT sensor (for exhaust side of bank 2) connector.
Turn the ignition switch to ON.
Check the MIL.
Result| Result | Proceed to |
| MIL illuminates | A |
| MIL does not illuminate | B |
| | REPLACE VVT SENSOR (FOR EXHAUST SIDE OF BANK 2) ()
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| 11.CHECK MIL (POWER STEERING OIL PRESSURE SENSOR) |
Disconnect the power steering oil pressure sensor connector.
Turn the ignition switch to ON.
Check the MIL.
Result| Result | Proceed to |
| MIL illuminates | A |
| MIL does not illuminate | B |
| | REPLACE POWER STEERING OIL PRESSURE SENSOR ()
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| 12.CHECK HARNESS AND CONNECTOR |
Disconnect the throttle body with motor assembly connector.
Disconnect the accelerator pedal sensor assembly connector.
Disconnect the No. 1 emission control valve set connector.
Disconnect the No. 2 emission control valve set connector.
Disconnect the VVT sensor (for intake side of bank 1) connector.
Disconnect the VVT sensor (for intake side of bank 2) connector.
Disconnect the VVT sensor (for exhaust side of bank 1) connector.
Disconnect the VVT sensor (for exhaust side of bank 2) connector.
Disconnect the power steering oil pressure sensor connector.
Disconnect the ECM connectors.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for LHD| Tester Connection | Condition | Specified Condition |
| A38-57 (VCPA) - Body ground | Always | 10 kΩ or higher |
| A38-59 (VCP2) - Body ground | Always | 10 kΩ or higher |
| C45-80 (VCTA) - Body ground | Always | 10 kΩ or higher |
| C45-67 (VCV1) - Body ground | Always | 10 kΩ or higher |
| C45-66 (VCV2) - Body ground | Always | 10 kΩ or higher |
for RHD| Tester Connection | Condition | Specified Condition |
| A52-57 (VCPA) - Body ground | Always | 10 kΩ or higher |
| A52-59 (VCP2) - Body ground | Always | 10 kΩ or higher |
| C46-80 (VCTA) - Body ground | Always | 10 kΩ or higher |
| C46-67 (VCV1) - Body ground | Always | 10 kΩ or higher |
| C46-66 (VCV2) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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