PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK PRE-INSPECTION. Ask the customer when and how the trouble occurred using the interview check list. Ref. to CHECK LIST FOR INTERVIEW . Before performing diagnostics, check the following items which might affect CVT problems. General inspection Ref. to INSPECTION , General Description. Disconnection of harness connector Visual check for harness damage Oil leakage Stall speed test Ref. to STALL TEST . Secondary pressure test Ref. to SECONDARY PRESSURE (LINE PRESSURE) TEST . Transfer clutch pressure test Ref. to TRANSFER CLUTCH PRESSURE TEST . Time lag test Ref. to TIME LAG TEST . Road test Ref. to ROAD TEST . Inhibitor switch Ref. to INHIBITOR SWITCH . | Is the item that is thought to influence the CVT problem working properly? | Go to step 2 . | Repair the items which may be affecting the CVT trouble. |
| 2 CHECK AT OIL TEMP LIGHT. Turn the ignition switch to ON and wait for at least 2 seconds. | Does the AT OIL TEMP light illuminate? | Go to step 3 . | Check the AT OIL TEMP light. |
| 3 CHECK AT OIL TEMP LIGHT. Start the engine and wait for two seconds or more. | Does the AT OIL TEMP light blink? | Go to step 4 . | Go to step 6 . |
| 4 CHECK INDICATION OF DTC. Read the DTC. NOTE: If the communication function of Subaru Select Monitor cannot be executed normally, check communication circuit. Ref. to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , Diagnostic Procedure for Subaru Select Monitor Communication. | Is DTC displayed on Subaru Select Monitor? | Record all DTC. Go to step 5 . | Go to step 6 . |
| 5 CHECK INFORMATION STORED IN FREEZE FRAME DATA. Using the Subaru Select Monitor, check the freeze frame data. | Are freeze frame data recorded? | Record the freeze frame data. Go to step 7 . | Go to step 7 . |
| 6 PERFORM GENERAL DIAGNOSTICS. Inspect using "Diagnostic Procedure without Diagnostic Trouble Code (DTC)". Ref. to DIAGNOSTIC PROCEDURE WITHOUT DIAGNOSTIC TROUBLE CODE (DTC) . Inspect using "Diagnostics with Phenomenon". Ref. to DIAGNOSTICS WITH PHENOMENON . Perform the Inspection Mode. Ref. to INSPECTION MODE . Read the DTC. | Is DTC displayed on Subaru Select Monitor? | Go to step 7 . | Finish the diagnosis. |
| 7 PERFORM DIAGNOSIS. Inspect using "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". Ref. to DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) . NOTE: For DTC table, refer to "List of Diagnostic Trouble Code (DTC)". Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . Repair the trouble cause. Perform the Clear Memory Mode. Perform the Inspection Mode. Ref. to INSPECTION MODE . Read the DTC. | Is DTC displayed on Subaru Select Monitor? | Inspect using "Diagnostic Procedure with Diagnostic Trouble Code (DTC)". Ref. to DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC) . | Finish the diagnosis. |
| NOTE |
|---|
| If the communication function of Subaru Select Monitor cannot be executed normally, check communication circuit. Ref. to COMMUNICATION FOR INITIALIZING IMPOSSIBLE , Diagnostic Procedure for Subaru Select Monitor Communication. |
| NOTE |
|---|
| For DTC table, refer to "List of Diagnostic Trouble Code (DTC)". Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . |
DIAGNOSTIC PROCEDURE
CHECK
Check the following items when a problem has occurred.
Note. Use copies of this page for interviewing customers.
Scheme 606
SUPPLEMENTAL RESTRAINT SYSTEM "AIRBAG"
The airbag system wiring harness is routed near the TCM.
| CAUTION | All the airbag system wiring harnesses and connectors are colored yellow. Do not use an electric test equipment to check these circuits. Be careful not to damage the airbag system wiring harness when performing diagnostics or servicing the TCM. |
MEASUREMENT
When measuring the voltage and resistance of the ECM, TCM or each sensor, use a tapered pin with a diameter of less than 0.64 mm (0.025 in) in order to avoid poor contact. Do not insert a pin of more than 0.65 mm (0.026 in) diameter.
BATTERY
Measure the battery voltage and specific gravity of the electrolyte.
Standard voltage: 12 V or more
Specific gravity: 1.260 or more
TRANSMISSION GROUND
Make sure that the ground terminal bolt is tightened securely.
Tightening torque: 16 N.m (1.6 kgf-m, 11.8 ft-lb)
Scheme 607
GENERAL TOOL
| TOOL NAME | REMARKS |
|---|---|
| Circuit tester | Used for measuring resistance, voltage and current. |
| Oscilloscope | Used for measuring the sensor. |
GENERAL TOOL DESCRIPTION
Scheme 608
Scheme 609
Scheme 610
Scheme 611
Scheme 612
Note. Measure after warming up.
| Item | Connector No. | Terminal No. | Measuring condition | Measured value | Resistance between terminal and chassis ground | Remarks |
|---|---|---|---|---|---|---|
| Backup power supply | B55 | 1 | 10-13V | |||
| Ignition power supply | B55 | 21 | 10-13V | |||
| Main power supply | B55 | 11 | 10-13V | |||
| Main power supply | B55 | 2 | 10-13V | |||
| Main power supply | B55 | 22 | 10-13V | |||
| Manual mode switch | B55 | 4 | Manual mode switch ON | Less than 1 V | ||
| Manual mode switch OFF | 8 V or more | |||||
| Manual mode UP switch | B55 | 5 | Paddle shift UP switch ON | Less than 1 V | ||
| Paddle shift UP switch OFF | 8 V or more | |||||
| Manual mode DOWN switch | B55 | 16 | Paddle shift DOWN switch ON | Less than 1 V | ||
| Paddle shift DOWN switch OFF | 8 V or more | |||||
| Stop light switch | B55 | 13 | Stop light switch ON | 8 V or more | ||
| Stop light switch OFF | Less than 1 V | |||||
| P range switch | B54 | 5 | P range | Less than 1 V | ||
| Except for P range | 8 V or more | |||||
| R range switch | B54 | 18 | R range | Less than 1 V | ||
| Except for R range | 8 V or more | |||||
| N range switch | B54 | 9 | N range | Less than 1 V | ||
| Except for N range | 8 V or more | |||||
| D range switch | B54 | 22 | D range | Less than 1 V | ||
| Except for D range | 8 V or more | |||||
| ATF temperature sensor | B54 | 3 | ATF temperature at 20°C (68°F) | Approx. 2.6 V | Approx. 2.6 kohms | |
| ATF temperature at 80°C (176°F) | Approx. 0.7 V | Approx. 370 ohms | ||||
| ATF temperature sensor GND | B54 | 16 | Always | Approx. 0 V | ||
| Secondary pressure sensor power supply output | B54 | 2 | Ignition switch ON | 5V | ||
| Secondary pressure sensor | B54 | 17 | Ignition switch ON, engine OFF | Approx. 0.5 V (0 MPa) | Value increases with increase of engine load. (0.5 - 4.5 V) | |
| Ignition switch ON, engine ON | Approx. 1.0 V (1.0 MPa) | |||||
| Secondary pressure sensor GND | B54 | 15 | Always | Approx. 0 V | ||
| Primary speed sensor | B54 | 6 | While driving | 0 or 5 V | Refer to the (Scheme 612) waveform (sensor) | |
| Secondary speed sensor | B54 | 7 | While driving | 0 or 5 V | Refer to the (Scheme 612) waveform (sensor) | |
| Front wheel speed sensor | B54 | 20 | While driving | 0 or 5 V | Refer to the (Scheme 612) waveform (sensor) | |
| Self shut output | B55 | 20 | For three seconds after ignition ON and OFF | Less than 1 V | ||
| Ignition switch OFF | 8 V or more | |||||
| F&R solenoid | B54 | 11 | Engine ON | Refer to the (Scheme 613) waveform (solenoid (1)) | Approx. 4 - 6 ohms | Resistance value at 20°C (68°F) Value is higher as the temperature increase. |
| Secondary solenoid | B54 | 12 | Engine ON | Refer to the (Scheme 613) waveform (solenoid (2)) | Approx. 5 - 7 ohms | Resistance value at 20°C (68°F) Value is higher as the temperature increase. |
| Primary UP solenoid | B54 | 24 | Engine ON, while UP shifting | Refer to the (Scheme 613) waveform (solenoid (3)) | Approx. 10 - 13.5 ohms | Resistance value at 20°C (68°F) Value is higher as the temperature increase. |
| Primary DOWN solenoid | B54 | 25 | Engine ON, while DOWN shifting | Refer to the (Scheme 613) waveform (solenoid (4)) | Approx. 10 - 13.5 ohms | Resistance value at 20°C (68°F) Value is higher as the temperature increase. |
| Lock-up duty solenoid | B54 | 26 | Lock-up ON | Refer to the (Scheme 613) waveform (solenoid (5)) | Approx. 10 - 13.5 ohms | Resistance value at 20°C (68°F) Value is higher as the temperature increase. |
| AWD solenoid | B54 | 13 | Engine ON, "P" or "N" range | Refer to the (Scheme 613) waveform (solenoid (6)) | Approx. 2 - 4.5 ohms | Resistance value at 20°C (68°F) Value is higher as the temperature increase. |
| Engine ON, "D" range, brake ON | Refer to the (Scheme 613) waveform (solenoid (7)) | |||||
| Lock-up ON/OFF solenoid | B54 | 23 | Lock-up OFF | Less than 1 V | Approx. 13 - 18.5 ohms | Resistance value at 20°C (68°F) Value is higher as the temperature increase. |
| Lock-up ON | Battery voltage or higher | |||||
| CAN communication line (+) | B55 | 18 | ||||
| CAN communication line (-) | B55 | 17 | ||||
| GND | B54 | 1 | Always | Approx. 0 V | ||
| GND | B54 | 14 | Always | Approx. 0 V | ||
| Data link signal (Subaru Select Monitor) | B55 | 19 | Ignition switch ON | 8 V or more | ||
| Ignition switch OFF | Less than 1 V |
ELECTRICAL SPECIFICATION CHART
Scheme 613
Scheme 614
Ref. to ROAD TEST .
PREPARATION FOR LEARNING
- Warm up or cool down until the ATF temperature displayed on the Subaru Select Monitor is 40 - 65°C (104 - 149°F).
- After stopping the vehicle, shift the select lever to "P" range.
- Apply the electronic parking brake.
- Lift up the vehicle. CAUTION: While working, be sure to keep the lower edge of the tires 30 cm or more above the ground as vehicle will vibrate.
- Connect the Subaru Select Monitor to data link connector.
- Turn the ignition switch to ON.
- Turn off all switches causing an electrical load, such as headlights, A/C, seat heater and rear de-fogger.
Note. Error message is not displayed even when an incorrect mode is set. In this case, the learning may not be performed correctly, retry "AT learning mode" from the beginning.
SIMPLE LEARNING
Note. Simple learning is performed with the vehicle lifted, without actually running the vehicle.
| CAUTION | Do not turn the power of the Subaru Select Monitor to OFF or disconnect the data link connector during the operation. |
- Select {AT related learning & inspecting mode} in the «Transmission Diagnosis» screen of the Subaru Select Monitor.
- Select {AT learning mode} in the «AT related learning & inspecting mode» screen of the Subaru Select Monitor.
- Follow the messages displayed on the Subaru Select Monitor screen when working. NOTE: During AT learning in progress, AT OIL TEMP light in the combination meter starts flashing at 2 Hz and the learning operation starts. The following message is displayed on the screen when the AT OIL TEMP light which was flashing at 2 Hz turns off.
- "AT learning normally ended." is displayed, simple AT learning is completed.
Note. If communication error occurs during learning, retry the "AT learning mode" from the beginning. If the message "Execute AT learning again after fixing troubles of the vehicle" is displayed during learning, select [OK] to display the List of Diagnostics Trouble Code. After repairing the locations indicated by the DTC, start the "AT learning mode" over from the beginning. When communication error occurs during learning, select lever does not shift occasionally. If select lever does not shift, turn the ignition to OFF and operate the lever.
If the message "AT learning ended abnormally." is displayed, start the "AT learning mode" over from the beginning.
| Message | Primary cause of abnormal end |
|---|---|
| AT learning ended abnormally. | Fault is detected during AT learning. The accelerator pedal is depressed during AT learning. Operation which is not directed is performed during AT learning. ATF temperature becomes out of specification during AT learning. Battery voltage is low. Malfunction indicator light illuminates. Electronic parking brake not applied strongly enough Brake pedal not stepped on firmly enough. Abnormal idle speed increase, etc. |
AT LEARNING MODE REFERENCE
- For detailed operation procedures, refer to PC application help for Subaru Select Monitor.
LIST
| DTC | Item | Content of diagnosis | Reference |
|---|---|---|---|
| P0705 | Transmission Range Sensor Circuit (PRNDL Input) | Inhibitor switch malfunction or short circuit | Ref. to DTC P0705 TRANSMISSION RANGE SENSOR CIRCUIT (PRNDL INPUT) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0708 | AT Range Switch Not Inputted | Inhibitor switch malfunction or open circuit | Ref. to DTC P0708 AT RANGE SWITCH NOT INPUTTED , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0712 | Transmission Fluid Temperature Sensor Circuit Low Input | ATF temperature sensor is faulty or input signal circuit is shorted. | Ref. to DTC P0712 TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT LOW INPUT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0713 | Transmission Fluid Temperature Sensor Circuit High Input | ATF temperature sensor is faulty or input signal circuit is open or shorted. | Ref. to DTC P0713 TRANSMISSION FLUID TEMPERATURE SENSOR CIRCUIT HIGH INPUT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0719 | Brake Switch Circuit Low | Brake switch malfunction, open or shorted input signal circuit | Ref. to DTC P0719 BRAKE SWITCH CIRCUIT LOW , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0720 | Output Speed Sensor Circuit | Front wheel speed sensor is faulty or input signal circuit is open or shorted. | Ref. to DTC P0720 OUTPUT SPEED SENSOR CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0724 | Brake Switch Circuit High | Brake switch malfunction, shorted input signal circuit | Ref. to DTC P0724 BRAKE SWITCH CIRCUIT HIGH , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0730 | Gearshift Control Performance Abnormal | Primary speed sensor, secondary speed sensor, control valve, or chain malfunction | Ref. to DTC P0730 GEARSHIFT CONTROL PERFORMANCE ABNORMAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0801 | Reverse Inhibit Control Circuit | Shift lock solenoid is faulty or output signal circuit is open or shorted. | Ref. to DTC P0801 REVERSE INHIBIT CONTROL CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0841 | Secondary Oil Pressure Sensor Performance | Secondary pressure sensor or control valve malfunction | Ref. to DTC P0842 SECONDARY OIL PRESSURE SENSOR PERFORMANCE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0842 | Secondary Oil Pressure Sensor Circuit (Low) | Secondary pressure sensor is faulty or input signal circuit is open or shorted. | Ref. to DTC P0842 SECONDARY OIL PRESSURE SENSOR CIRCUIT (LOW) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0843 | Secondary Oil Pressure Sensor Circuit (High) | Secondary pressure sensor is faulty or input signal circuit is shorted. | Ref. to DTC P0843 SECONDARY OIL PRESSURE SENSOR CIRCUIT (HIGH) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0890 | AT Self-Shut Relay Diagnosis (Low) | Self-shut relay malfunction, open or shorted input signal circuit | Ref. to DTC P0890 AT SELF-SHUT RELAY DIAGNOSIS (LOW) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0951 | Manual Switch | Manual mode switch malfunction, open or shorted input signal circuit | Ref. to DTC P0951 MANUAL SWITCH , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0962 | Secondary Solenoid Circuit (Low) | Secondary solenoid is faulty or output signal circuit is shorted. | Ref. to DTC P0962 SECONDARY SOLENOID CIRCUIT (LOW) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0963 | Secondary Solenoid Circuit (High) | Secondary solenoid is faulty or output signal circuit is open or shorted. | Ref. to DTC P0963 SECONDARY SOLENOID CIRCUIT (HIGH) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0965 | Forward & Reverse Solenoid Function | F&R solenoid, forward clutch or control valve malfunction | Ref. to DTC P0965 FORWARD & REVERSE SOLENOID FUNCTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0966 | Forward & Reverse Solenoid Circuit (Low) | F&R solenoid is faulty or output signal circuit is shorted. | Ref. to DTC P0966 FORWARD & REVERSE SOLENOID CIRCUIT (LOW) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0967 | Forward & Reverse Linear Solenoid Circuit (High) | F&R solenoid is faulty or output signal circuit is open or shorted. | Ref. to DTC P0967 FORWARD & REVERSE LINEAR SOLENOID CIRCUIT (HIGH) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0970 | Transfer Solenoid Circuit (Low) | AWD solenoid is faulty or output signal circuit is shorted. | Ref. to DTC P0970 TRANSFER SOLENOID CIRCUIT (LOW) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0971 | Transfer Solenoid Circuit (High) | AWD solenoid is faulty or output signal circuit is open or shorted. | Ref. to DTC P0971 TRANSFER SOLENOID CIRCUIT (HIGH) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0973 | Primary Solenoid System A Circuit (Low) | Primary UP solenoid is faulty or output signal circuit is shorted. | Ref. to DTC P0973 PRIMARY SOLENOID SYSTEM A CIRCUIT (LOW) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0974 | Primary Solenoid System A Circuit (High) | Primary UP solenoid is faulty or output signal circuit is open or shorted. | Ref. to DTC P0974 PRIMARY SOLENOID SYSTEM A CIRCUIT (HIGH) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0976 | Primary Solenoid System B Circuit (Low) | Primary DOWN solenoid is faulty or output signal circuit is shorted. | Ref. to DTC P0976 PRIMARY SOLENOID SYSTEM B CIRCUIT (LOW) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P0977 | Primary Solenoid System B Circuit (High) | Primary DOWN solenoid is faulty or output signal circuit is open or shorted. | Ref. to DTC P0977 PRIMARY SOLENOID SYSTEM B CIRCUIT (HIGH) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P1718 | AT CAN Communication Circuit | CAN communication is open or shorted. ECM, ABS/VDCCM CAN communication error | Ref. to DTC P1718 AT CAN COMMUNICATION CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P1724 | AT EEPROM Error | TCM EEPROM malfunction | Ref. to DTC P1724 AT EEPROM ERROR , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P1725 | AT Body System CAN Communication Trouble | Combination meter, A/C, body integrated unit CAN communication error | Ref. to DTC P1725 AT BODY SYSTEM CAN COMMUNICATION TROUBLE , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P2746 | Primary Pulley Revolution Speed Sensor Circuit | Primary speed sensor malfunction, open or shorted input signal circuit | Ref. to DTC P2746 PRIMARY PULLEY REVOLUTION SPEED SENSOR CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P2750 | Sec. Pulley Revolution Speed Sensor Circuit | Secondary speed sensor malfunction, open or shorted input signal circuit | Ref. to DTC P2750 SEC. PULLEY REVOLUTION SPEED SENSOR CIRCUIT , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P2762 | Lock-Up Duty Solenoid Malfunction | Lock-up duty solenoid, lock-up clutch or control valve malfunction | Ref. to DTC P2762 LOCK-UP DUTY SOLENOID MALFUNCTION , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P2763 | Lock-Up Duty Solenoid Circuit (High) | Lock-up duty solenoid is faulty or output signal circuit is open or shorted. | Ref. to DTC P2763 LOCK-UP DUTY SOLENOID CIRCUIT (HIGH) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P2764 | Lock-Up Duty Solenoid Circuit (Low) | Lock-up duty solenoid is faulty or output signal circuit is shorted. | Ref. to DTC P2764 LOCK-UP DUTY SOLENOID CIRCUIT (LOW) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P2769 | Lock-Up ON/OFF Solenoid Circuit (Low) | Lock-up ON/OFF solenoid is faulty or output signal circuit is shorted. | Ref. to DTC P2769 LOCK-UP ON/OFF SOLENOID CIRCUIT (LOW) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
| P2770 | Lock-Up ON/OFF Solenoid Circuit (High) | Lock-up ON/OFF solenoid is faulty or output signal circuit is open or shorted. | Ref. to DTC P2770 LOCK-UP ON/OFF SOLENOID CIRCUIT (HIGH) , Diagnostic Procedure with Diagnostic Trouble Code (DTC). |
DTC CHART