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Subaru Crosstrek Service Manual: Dtc p2012 tgv control circuit low bank 2

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P2012 TGV CONTROL CIRCUIT LOW BANK 2

DTC DETECTING CONDITION:

Immediately at fault recognition

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION">, and Inspection Mode Inspection Mode > PROCEDURE">.

WIRING DIAGRAM:

Engine electrical system Engine Electrical System">

STEPCHECKYESNO

1.CHECK HARNESS BETWEEN ECM AND TUMBLE GENERATOR VALVE ACTUATOR LH CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from ECM.

3) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B134) No. 23 (+) — Chassis ground (−):

(B134) No. 24 (+) — Chassis ground (−):

Is the voltage 5 V or more?

Repair the short circuit to power in harness between ECM connector and tumble generator valve actuator LH connector.

Replace the tumble generator valve actuator LH. Tumble Generator Valve Actuator">

1. OUTLINE OF DIAGNOSIS

Detect the open or short circuit of tumble generator valve motor.

Judge as NG when the overcurrent signal is sent from IC after tumble generator valve driving IC diagnosis.

2. COMPONENT DESCRIPTION

(1)

Engine control module (ECM)

(2)

Tumble generator valve

(3)

Battery

3. EXECUTION CONDITION

Secondary Parameters

Execution condition

Battery voltage

≥ 10.9 V

TGV command

= Open

or

= closed

4. GENERAL DRIVING CYCLE

Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

Judgment Value

Malfunction Criteria

Threshold Value

Overcurrent signal from driver IC

Short circuit to GND is detected when IC current > 16 A

or

Short circuit to B+ is detected when IC current > 14 A

= ON

Time Needed for Diagnosis: 1 second

Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.

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