Subaru Outback (BR): Basic Diagnostic Procedure of Automatic Transmission

A: PROCEDURE

Check List for Interview

A: CHECK

Check the following items when a problem has occurred.

NOTE: Use copies of this page for interviewing customers.

General Description

A: CAUTION

1. 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.

2. 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.

B: INSPECTION

1. BATTERY

Measure the battery voltage and specific gravity of the electrolyte.

Standard voltage: 12 V or more

Specific gravity: 1.260 or more

2. TRANSMISSION GROUND

Make sure that the ground terminal bolt is tightened securely.

Tightening torque: 7 N*m (0.7 kgf-m, 5.2 ft-lb)

1. Ground bolt

3. ATF LEVEL

Make sure that ATF level is the specified amount.

<Ref. to 5AT-29, INSPECTION, Automatic Transmission Fluid.>

1. Oil level gauge
2. Upper level
3. Lower level

4. FRONT DIFFERENTIAL OIL LEVEL

Make sure the front differential oil level is the specified amount. <Ref. to 5AT-31, INSPECTION, Differential Gear Oil.>

1. Upper level
2. Lower level

5. OPERATION OF SHIFT SELECT LEVER

Make sure there is no noise, dragging or contact pattern in each select lever range.

WARNING: Stop the engine while checking operation of the select lever.

C: PREPARATION TOOL

1. SPECIAL TOOL

2. GENERAL TOOL

Electrical Component Location

A: LOCATION

1. CONTROL MODULE

1. Engine control module (ECM)
2. AT OIL TEMP light
3. Transmission control module (TCM)
4. Data link connector
5. Body integrated unit
6. AWD light

2. SENSOR

1. Accelerator pedal position sensor
2. Front vehicle speed sensor
3. Inhibitor switch
4. Rear vehicle speed sensor
5. Turbine speed sensor 1
6. ATF temperature sensor
7. Turbine speed sensor 2

3. SOLENOID

1. High & low reverse clutch solenoid
2. Direct clutch solenoid
3. Front brake solenoid
4. Input clutch solenoid
5. Line pressure solenoid
6. Lock-up solenoid
7. Transfer solenoid
8. Forward brake solenoid

4. OIL PRESSURE SWITCH

1. Front brake oil pressure switch
2. Input clutch oil pressure switch
3. High & low reverse clutch oil pressure switch
4. Direct clutch oil pressure switch
5. Forward brake oil pressure switch

Transmission Control Module (TCM) I/O Signal

A: ELECTRICAL SPECIFICATION

NOTE: Measure after warming up.

Subaru Select Monitor

A: OPERATION

For detailed operation procedures, refer to "PC application help for Subaru Select Monitor".

Read Current Data

A: OPERATION

For detailed operation procedures, refer to "PC application help for Subaru Select Monitor".

• The support data list is as follows.

Read Diagnostic Trouble Code (DTC)

A: OPERATION

For detailed operation procedures, refer to "PC application help for Subaru Select Monitor".

NOTE: For details concerning DTC, refer to List of Diagnostic Trouble Code (DTC). <Ref. to 5AT(diag)-33, List of Diagnostic Trouble Code (DTC).>

Clear Memory Mode

A: OPERATION

For detailed operation procedures, refer to "PC application help for Subaru Select Monitor".

NOTE:

• If {Clear Memories 2} is executed, DTCs and learned control memory are cleared.
• If {Clear Memories 2} is executed, perform learning.

  <Ref. to 5AT(diag)-23, Learning Control.>

Inspection Mode

A: PROCEDURE

CAUTION: Observe the traffic law when driving on public roads.

1) Shift the select lever to "D" range, and then drive the vehicle with changing the gear from 1st to 5th.

2) When driving the vehicle at 5th speed of "D" range, set the gear to manual mode and drive the vehicle by downshifting using "-" of the paddle shift switch from 5th → 4th, 4th → 3rd, 3rd → 2nd, and 2nd → 1st.

NOTE: At shifting down, drive the vehicle at least 10 seconds in each speed.

3) Shift the select lever to "R" range and drive the vehicle for 2 seconds or more.

Learning Control

A: GENERAL DESCRIPTION

• Follow the messages displayed on the Subaru Select Monitor when working.
• When the following work is performed, perform learning for the transmission.

Replacement of TCM/Replacement or disassembly of transmission assembly/Replacement of control valve body/Performing "Clear Memories 2".

B: PROCEDURE

1. PREPARATION FOR LEARNING

1) Warm up or cool down the vehicle until the ATF temperature displayed on the Subaru Select Monitor is 60 - 80ºC (140 - 176ºF).

2) Shift the select lever to "P" range.

3) Apply the electronic parking brake.

4) 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.

5) Connect the Subaru Select Monitor to data link connector.

6) Turn the ignition switch to ON.

7) Turn off all switches causing an electrical load, such as headlights, A/C, seat heater and rear defogger, etc.

2. 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 OFF during work, and do not disconnect the data link connector.

1) Select {AT related learning & inspecting mode} in the "Transmission Diagnosis" display screen of the Subaru Select Monitor.

2) Select {AT learning mode} in the "AT related learning & inspecting mode" screen of the Subaru Select Monitor.

3) Follow the messages displayed on the Subaru Select Monitor screen when working.

NOTE: For the messages "SHIFT control system learning in progress" and "AWD control system learning in progress", AT OIL TEMP light in the combination meter blinks at a cycle of 2 Hz before learning operation starts. When AT OIL TEMP light in the combination meter goes off, the following message is displayed on the screen. When operation ends abnormally during the learning, AT OIL TEMP light blinks at a cycle of 4 Hz.

4) When "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.
• If the message "AT learning ended abnormally." is displayed, start the "AT learning mode" over from the beginning.

• For detailed operation procedures, refer to "PC application help for Subaru Select Monitor".

3. DRIVING CHECK

Drive the vehicle to check that there is no malfunction such as shifting shock.

When shifting shock is felt, perform learning again.

When reducing of shifting shock is not felt, check that other parts are normal.

AT OIL TEMP Warning Light Display

A: OPERATION

When any on-board diagnostics item is malfunctioning, or the learning has not yet completed, AT OIL TEMP light blinks. Blinking continues from the engine start to the ignition switch OFF. The malfunctioning part or unit can be determined by a DTC. Problems which occurred previously can also be identified through the memory function. If the AT OIL TEMP light does not blink although a problem is occurring, the problem can be determined by checking the performance characteristics of each sensor using the Subaru Select Monitor. If the learning has not yet completed, "AT learning not completed" is displayed when the Subaru Select Monitor is connected while AT OIL TEMP light is blinking. The AT OIL TEMP light blinking will go off, when the learning is performed. Indicator light signal patterns are as shown in the figure.

1. Ignition switch (engine OFF)
2. Normal (engine ON)
3. Faulty (engine ON)
4. Learning not completed (engine ON)

1. ON
2. OFF
3. 2 sec.
4. 1 sec.
5. Blink

When the AT OIL TEMP light does not operate normally, check the AT OIL TEMP light circuit. <Ref. to 5AT(diag)-26, INSPECTION, AT OIL TEMP Warning Light Display.>

B: INSPECTION

DIAGNOSIS:

• AT OIL TEMP light circuit is open or shorted.
• Combination meter malfunction

TROUBLE SYMPTOM:

• When the ignition switch is turned to ON, the AT OIL TEMP light does not illuminate.
• AT OIL TEMP light remains lit after engine start.

WIRING DIAGRAM:

AWD Warning Light Display

A: OPERATION

AWD warning light illuminates or blinks at start, or when AWD is faulty.

• Normal

AWD light always illuminates when the ignition switch is ON (engine OFF). Light goes off after two seconds from engine ON.

• Faulty

AWD warning light blinks at 2 Hz, when tires with different diameters are installed, or when the vehicle is driven with air pressure of any of the four tires significantly low.

1. Ignition switch (engine OFF)
2. Normal (engine ON)
3. Faulty (engine ON)

1. ON
2. OFF
3. 2 sec.
4. 1 sec.
5. Blink

If the AWD light does not illuminate, or illumination patterns are not as above, check the AWD light circuit.

<Ref. to 5AT(diag)-29, INSPECTION, AWD Warning Light Display.>

B: INSPECTION

DIAGNOSIS:

• AWD light circuit is open or shorted.
• Combination meter malfunction
• TCM malfunction

TROUBLE SYMPTOM:

• When the ignition switch is turned to ON, the AWD light does not illuminate.
• AWD light remains lit after engine start.

WIRING DIAGRAM:

Diagnostic Procedure for Subaru Select Monitor Communication

A: COMMUNICATION FOR INITIALIZING IMPOSSIBLE

DIAGNOSIS:

Defective harness connector

TROUBLE SYMPTOM:

Subaru Select Monitor communication failure

WIRING DIAGRAM:

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