Toyota Venza: Intake Manifold Runner Control Stuck Open (Bank 1) (P2004,P2006)

Toyota Venza Service Manual / 1ar-fe Engine Control / Sfi System / Intake Manifold Runner Control Stuck Open (Bank 1) (P2004,P2006)

DESCRIPTION

The tumble control valve is built into the intake manifold. The tumble control valve is composed of a position sensor and a DC motor. The DC motor opens and closes the tumble control valve in response to signals from the ECM. The position sensor detects the opening angle of the tumble control valve.

When the tumble control valve is closed, the intake air tumble flow intensifies and negative pressure is generated between the tumble control valve and intake valve which atomizes the fuel. Combustion is enhanced and exhaust gas emissions are reduced at low temperatures.

DTC No.	DTC Detection Condition	Trouble Area
P2004	When the tumble control valve opening angle is 17 deg. or more after requesting the tumble control valve to fully close (2 trip detection logic).	Open or short in intake air control valve actuator (for tumble control valve) circuit Intake air control valve actuator (for tumble control valve) Intake manifold ECM
P2006	When the tumble control valve opening angle is less than 35 deg. after requesting the tumble control valve to fully open (2 trip detection logic).

HINT:

After confirming DTCs P2004 and/or P2006, use the Techstream to confirm the Intake Air Control Position while performing Control the IAC Duty Ratio of the Active Test.

Reference (Normal Condition (Engine Warmed Up)):

Control the IAC Duty Ratio operation	Intake Air Control Position
100%	Approximately 70 deg.
0%	Approximately 70 deg.
-100%	Approximately 2 deg.

MONITOR DESCRIPTION

When the ECM has requested a tumble control valve close operation but the actual tumble control valve opening angle is 17 deg. or more for 10 seconds, DTC P2004 is output. When the ECM has requested a tumble control valve open operation but the actual tumble control valve opening angle is less than 35 deg. for 10 seconds, DTC P2006 is output.

MONITOR STRATEGY

Related DTCs	P2004: Tumble Control Valve Stuck Open P2006: Tumble Control Valve Stuck Closed
Required Sensors/Components (Main)	Tumble control valve
Required Sensors/Components (Related)	Intake air temperature sensor, Engine coolant temperature sensor
Frequency of Operation	Once per driving cycle
Duration	Approximately 10 seconds
MIL Operation	2 driving cycles
Sequence Operation	None

TYPICAL ENABLING CONDITIONS

All

The monitor will run whenever these DTCs are not stored	None
Engine coolant temperature	-10°C (14°F) or higher
Intake air temperature	-10°C (14°F) or higher
Ignition switch	ON
Battery voltage	8 V or higher

TYPICAL MALFUNCTION THRESHOLDS

P2004

Control valve angle

17 deg. or more

P2006

Control valve angle

Less than 35 deg.

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure) (See page ).

Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON and turn the Techstream on [A].
Enter the following menus: Powertrain / Engine / Data List / Coolant Temp.
HINT:
- Check DTC P2004 at a coolant temperature of 30°C (86°F) or less.
- Check DTC P2006 at a coolant temperature of 80°C (176°F) or higher.
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON, wait approximately 10 seconds, and then turn the ignition switch off. Repeat this procedure 3 times [B].
Enter the following menus: Powertrain / Engine / Trouble Codes [C].
Read the Pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P2004 or P2006.

Check the DTC judgment result.

Techstream Display	Description
NORMAL	DTC judgment completed System normal
ABNORMAL	DTC judgment completed System abnormal
INCOMPLETE	DTC judgment not completed Perform driving pattern after confirming DTC enabling conditions
N/A	Unable to perform DTC judgment Number of DTCs which do not fulfill DTC preconditions has reached ECU's memory limit

HINT:

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.

If the test result is INCOMPLETE or N/A and no pending DTC is output, perform a universal trip and check for permanent DTCs (See page ).
HINT:
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

HINT:

Read freeze frame data using the Techstream. 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.	CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2004 OR P2006)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Result	Proceed to
DTC P2004 or P2006 is output	A
P2004 or P2006 and other DTCs are output	B

HINT:

If any DTCs other than P2004 or P2006 are output, troubleshoot those DTCs first.

GO TO DTC CHART

2.	INSPECT INTAKE AIR CONTROL VALVE ACTUATOR (FOR TUMBLE CONTROL VALVE)

(a) Inspect the intake air control valve actuator (See page ).

REPLACE INTAKE AIR CONTROL VALVE ACTUATOR (FOR TUMBLE CONTROL VALVE)

3.	INSPECT INTAKE MANIFOLD (TUMBLE CONTROL VALVE OPERATION)

(a) Inspect the intake manifold (See page
).

REPLACE INTAKE MANIFOLD

4.	CHECK HARNESS AND CONNECTOR (ECM - INTAKE AIR CONTROL ACTUATOR)

(a) Disconnect the ECM connector.

(b) Disconnect the intake air control valve actuator connector.

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
B58-3 (IA1-) - U3-4 (M-)	Always	Below 1 Ω
B58-4 (IA1+) - U3-5 (M+)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
B58-3 (IA1-) or U3-4 (M-) - Body ground	Always	10 kΩ or higher
B58-4 (IA1+) or U3-5 (M+) - body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	CHECK WHETHER DTC OUTPUT RECURS (DTC P2004 OR P2006)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Clear the DTCs (See page ).

(e) Turn the ignition switch off and wait for at least 30 seconds.

(f) Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

(g) Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.

(h) Read the pending DTCs.

Result	Proceed to
DTC P2004 or P2006 is output	A
DTC is not output	B

REPLACE ECM

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