Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - 1UR-FE ENGINE CONTROL
PERFORM ACTIVE TEST USING GTS (OPERATE VSV FOR ACIS)
INSPECT VACUUM SWITCHING VALVE (FOR ACIS)
CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE VOLTAGE)
CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE - ECM)
DTC P0660 Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)
DESCRIPTION
This circuit opens and closes the Intake Air Control Valve (IACV) in response to the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).
| DTC No. | DTC Detection Condition | Trouble Area |
| P0660 | The following conditions are met simultaneously for 0.5 seconds or more (2 trip detection logic): Voltage of acoustic control induction system terminal of the ECM is low when the actuator is off. The engine has been started. |
Open or short in intake air control valve circuit Intake air surge tank assembly (intake air control valve assembly) ECM |
WIRING DIAGRAM
INSPECTION PROCEDURE
- NOTICE:
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
- HINT:
- Read freeze frame data using the GTS. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
| 1.PERFORM ACTIVE TEST USING GTS (OPERATE VSV FOR ACIS) |
Disconnect the vacuum hose from port F on the vacuum switching valve (for ACIS).
Connect the GTS to the DLC3.
Start the engine.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Intake Control.
Operate the VSV for ACIS.
Check the VSV air flow when switching the VSV.
- OK:
Test Condition Specified Condition VSV is ON Air from port E flows out through port F VSV is OFF Air from port E flows out through air filter
| *a | VSV is ON |
| *b | VSV is OFF |
| *c | Air |
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| OK | ||
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| 2.INSPECT VACUUM SWITCHING VALVE (FOR ACIS) |
Inspect the vacuum switching valve (for ACIS) ().
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| OK | |
| 3.CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE VOLTAGE) |
Disconnect the intake air control valve assembly connector.
Turn the engine switch on (IG).
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition C129-1 - Body ground Engine switch on (IG) 11 to 14 V
| *a | Front view of wire harness connector (to Intake Air Control Valve Assembly) |
Reconnect the intake air control valve assembly connector.
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| OK | |
| 4.CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE - ECM) |
Disconnect the intake air control valve assembly connector.
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for RHD Tester Connection Condition Specified Condition C129-2 - C46-62 (ACIS) Always Below 1 Ω C129-2 or C46-62 (ACIS) - Body ground Always 10 kΩ or higher for LHD Tester Connection Condition Specified Condition C129-2 - C45-62 (ACIS) Always Below 1 Ω C129-2 or C45-62 (ACIS) - Body ground Always 10 kΩ or higher
Reconnect the intake air control valve assembly connector.
Reconnect the ECM connector.
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| OK | ||
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