| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM10000000255UH |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [09/2022 - ] |
| Title: G16E-GTS (ENGINE CONTROL): SFI SYSTEM: P166014; Air Intake Control Valve Circuit Short to Ground or Open; 2023 - 2025 MY GR Corolla [09/2022 - ] | ||
|
DTC |
P166014 |
Air Intake Control Valve Circuit Short to Ground or Open |
DESCRIPTION
The air cleaner is equipped with two inlets, one of which is opened or closed by the Air Intake Control Valve (AICV). This system reduces intake noise and increases engine power at low-to-high engine speed range. When the engine is operating in the low-to-mid speed range, this control operates the AICV to close one of the air cleaner inlets. When the engine speed is more than 3600 rpm, the ECM activates VSV and opens the AICV.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Note |
|---|---|---|---|---|---|
|
P166014 |
Air Intake Control Valve Circuit Short to Ground or Open |
Voltage of terminal air intake control valve of the ECM is low when the VSV is not operating for 3 seconds or more (1 trip detection logic). |
|
Does not come on |
SAE Code: P1660 |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following 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.
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING GTS (ACTIVATE THE VSV FOR AICS) |
|
*1 |
Air |
|
*2 |
Port E |
|
*3 |
Port F |
|
*4 |
Air Filter |
|
*a |
Vacuum Switching Valve is On |
|
*b |
Vacuum Switching Valve is Off |
(a) Disconnect the vacuum hose (port F) from the vacuum switching valve assembly (for AICV).
(b) Enter the following menus.
Powertrain > Engine > Active Test
|
Tester Display |
|---|
|
Activate the VSV for AICS |
(c) Check the operation of the vacuum switching valve assembly (for AICV) when the vacuum switching valve assembly (for AICV) is operated using the GTS.
Standard:
|
GTS Connection |
Specified Condition |
|---|---|
|
ON |
Air from port E flows out through port F |
|
OFF |
Air from port E flows out through the air filter |
| OK |
|
|
|
2. |
INSPECT VACUUM SWITCHING VALVE ASSEMBLY (FOR AICV) |
Click here
![2023 - 2025 MY GR Corolla [09/2022 - ]; G16E-GTS (INTAKE / EXHAUST): INTAKE SYSTEM: ON-VEHICLE INSPECTION+](/t3Portal/stylegraphics/info.gif)
| NG |
|
REPLACE VACUUM SWITCHING VALVE ASSEMBLY (FOR AICV) |
|
|
3. |
CHECK TERMINAL VOLTAGE (POWER SOURCE OF VACUUM SWITCHING VALVE ASSEMBLY (FOR AICV)) |
(a) Disconnect the vacuum switching valve assembly (for AICV) connector.
(b) Turn the ignition switch to ON.
|
(c) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 1 INTEGRATION RELAY - VACUUM SWITCHING VALVE) |
|
|
4. |
CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE ASSEMBLY (FOR AICV) - ECM) |
(a) Disconnect the vacuum switching valve assembly (for AICV) connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C137-1(AIRV) - C142-49(AICV) |
Always |
Below 1 Ω |
|
C137-1(AIRV) or C142-49(AICV) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
REPLACE ECM
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|