Automatic Transmission 4AT (Diagnostics): Other Subaru Forester SH

PROCEDURE

BASIC DIAGNOSTIC PROCEDURE

CHECK

Check the following items when the problem occurs.

Note. Use copies of this article for interviewing customers.

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SUPPLEMENTAL RESTRAINT SYSTEM "AIRBAG"

The airbag system wiring harness is routed near 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.

1. Chassis side

Tightening torque

13 N.m (1.3 kgf-m, 9.6 ft-lb)

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ATF LEVEL

Make sure that ATF level is the specified amount. Refer to INSPECTION , Automatic Transmission Fluid.

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FRONT DIFFERENTIAL OIL LEVEL

Make sure the front differential oil level is at the specified amount. Refer to INSPECTION , Differential Gear Oil.

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GENERAL TOOL

GENERAL TOOL DESCRIPTION CHART

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ELECTRICAL SPECIFICATION CHART

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1. Prepare the Subaru Select Monitor kit.
2. Prepare PC with Subaru Select Monitor installed.
3. Connect the SDI (Subaru Diagnostic Interface) to the PC USB port (exclusively for Subaru Selector Monitor) using a USB cable. NOTE: Port exclusively for Subaru Select Monitor refers to the USB port used when installing Subaru Select Monitor.
4. Connect the diagnosis cable to SDI.
5. Connect the SDI to data link connector located in the lower portion of the instrument panel (on the driver's side). CAUTION: Do not connect the scan tools other than the Subaru Select Monitor.
6. Start the PC.
7. Turn the ignition switch to ON.
8. Run the "PC application for Subaru Select Monitor".

1. Shift the select lever to the "D" range, and then drive the vehicle at 60 km/h (37 MPH) for at least 10 seconds.
2. Drive the vehicle with manual mode.

PREPARATION FOR LEARNING

1. Warm-up or cool down until the ATF temperature displayed on the Subaru Select Monitor reaches 60 - 80°C (140 - 176°F).
2. Shift the select lever to "P" range.
3. Fully apply the parking brake.
4. Lift up the vehicle. CAUTION: Be sure to keep the lowest edge of the tires 30 cm or more off the ground because the vehicle vibrates during the work.
5. Connect the Subaru Select Monitor to the data link connector.
6. Turn the ignition switch to ON.
7. Turn OFF all switches, which produce an electrical load, including headlight, air conditioner, seat heater, rear defogger, etc.
8. Turn the ECO switch to ON for model with ECO switch. Turn the SPORT mode switch to OFF for model with SPORT mode. Turn the POWER/HOLD switch to OFF for model with POWER/HOLD switch. Set to I mode for model with SI-DRIVE.

Note. Error message is not displayed even when an incorrect mode is set. While the operation is continued, "AT learning promoting" is displayed, but it cannot end normally. If the message does not change after 2 minutes have passed, retry "AT learning mode" from the beginning.

SIMPLE LEARNING

Note. Simple learning is learning performed with the vehicle lifted, without actually running the vehicle.

1. Select {Learning and inspection mode related to AT} on the «Transmission Diagnosis» display screen of Subaru Select Monitor.
2. Select {AT learning mode} on the «Learning and inspection mode related to AT» display screen of Subaru Select Monitor.
3. Perform the procedures according to the message displayed on the Subaru Select Monitor. NOTE: During AT learning in progress, SPORT indicator 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 SPORT indicator light turns off.
4. "AT learning normally ended." is displayed, simple AT learning is completed. NOTE: If communication error occurs during learning, retry "AT learning mode" from the beginning. If "Execute AT learning again after fixing troubles of the vehicle" is displayed during learning, select [OK] to display the List of Diagnostics Trouble Code. Retry "AT learning mode" from the beginning after repairing the DTC detecting portion. If "AT learning ended abnormally." is displayed, retry "AT learning mode" from the beginning. DIAGNOSTICS TROUBLE CODE CHART 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. The brake pedal is not depressed fully. The parking brake is not applied fully. Abnormal idle rise occurs. Other similar causes are probable. For details concerning the operation procedure, refer to the PC application help for Subaru Select Monitor.

LIST

DIAGNOSTIC TROUBLE CODE CHART