Subaru Crosstrek Service Manual: Dtc p0962 pressure control solenoid "a" control circuit low

Subaru Crosstrek Service Manual / Continuously variable transmission (diagnostics) / Diagnostic procedure with diagnostic trouble code (dtc) / Dtc p0962 pressure control solenoid "a" control circuit low

CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0962 PRESSURE CONTROL SOLENOID "A" CONTROL CIRCUIT LOW

DTC detecting condition:

Immediately at fault recognition

Trouble symptom:

• Engine speed increases abruptly, and can not start.

• Engine speed increases abruptly during driving.

CAUTION:

Use the check board when measuring the TCM terminal voltage and resistance.

Wiring diagram:

CVT control system CVT Control System">

STEP	CHECK	YES	NO

1.CHECK INPUT SIGNAL FOR TCM.

1) After driving with warm up condition, park the vehicle while depressing the brake pedal at “N” range.

2) Read the data of «Secondary Set Current» and «Secondary Actual Current» using Subaru Select Monitor.

Does the value of «Secondary Set Current» and «Secondary Actual Current» almost correspond?

Check for poor contact of connector.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0962 PRESSURE CONTROL SOLENOID "A" CONTROL CIRCUIT LOW">Go to Step 2.

2.CHECK HARNESS.

1) Turn the ignition switch to OFF.

2) Disconnect the TCM connector.

3) Disconnect the transmission connector.

4) Measure the resistance between TCM connector and chassis ground.

Connector & terminal

(B54) No. 32 — Chassis ground:

Is the resistance 1 M? or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0962 PRESSURE CONTROL SOLENOID "A" CONTROL CIRCUIT LOW">Go to Step 3.

Repair the short circuit of harness.

3.CHECK SECONDARY SOLENOID.

Measure the resistance between transmission connector and transmission body.

Connector & terminal

(T4) No. 6 — Transmission body:

Is the resistance approx. 5 — 7 ?? (when cold)

Check for poor contact of connector, and if no fault is found, replace the TCM. Transmission Control Module (TCM)">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0962 PRESSURE CONTROL SOLENOID "A" CONTROL CIRCUIT LOW">Go to Step 4.

4.CHECK HARNESS INSIDE TRANSMISSION.

CAUTION:

Start work after ATF cools down.

1) Remove the transmission valve cover.

2) Check for the harness pinch, damage.

Is there any fault in the harness?

Replace the transmission harness.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0962 PRESSURE CONTROL SOLENOID "A" CONTROL CIRCUIT LOW">Go to Step 5.

5.CHECK HARNESS INSIDE TRANSMISSION.

1) Disconnect the control valve body connector.

2) Measure the resistance between transmission connector and transmission body.

Connector & terminal

(T4) No. 6 — Transmission body:

Is the resistance 1 M? or more?

Replace the control valve body. Control Valve Body">

Replace the transmission harness.

1. OUTLINE OF DIAGNOSIS

Diagnosis 1

• Detect the ground short of the transmission line pressure solenoid drive circuit.

• Judge as NG if the transmission line pressure solenoid drive current is higher than the predetermined value.

Diagnosis 2

• Detect the ground short of the transmission line pressure solenoid drive circuit.

• Judge as NG when an abnormal signal is received from the solenoid driver IC of the transmission line pressure solenoid drive circuit.

2. EXECUTION CONDITION

Secondary Parameters	Execution condition
Diagnosis 1
12 V battery system voltage	≥ 9 V
Commanded line pressure control solenoid valve current	≥ 0.1 A
Diagnosis 2
12 V battery system voltage	≥ 9 V

3. 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
Diagnosis 1
Measured line pressure control solenoid valve current	≥ 1.1 A
Diagnosis 2
Signal of malfunction from solenoid driver IC	ON
As defined by:
Measured line pressure control solenoid valve current ≥ 1.2 A

Time Needed for Diagnosis: 0.5 seconds

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

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