WIRING DIAGRAM
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK INPUT SIGNAL FOR TCM. Turn the ignition switch to ON. Move the select lever to each range, read the data of "P, R, N, D range" using the Subaru Select Monitor. | Is the display of the corresponding range "ON"? | Go to step 7 . | Go to step 2 . |
| 2 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and transmission connectors. Measure the resistance of harness between TCM connector and transmission connector. Connector & terminal (B54) No. 5 - (B12) No. 3: (B54) No. 18 - (B12) No. 2: (B54) No. 9 - (B12) No. 1: (B54) No. 22 - (B12) No. 8 | Is each resistance less than 1 ohms? | Go to step 3 . | Repair the open circuit of harness. |
| 3 CHECK HARNESS. Measure the resistance of harness between transmission connector and transmission ground. Connector & terminal (B12) No. 4 - Transmission ground | Is the resistance less than 1 ohms? | Go to step 4 . | Repair the open circuit of harness. |
| 4 CHECK HARNESS. Disconnect the inhibitor switch connector. Measure the resistance between transmission connector and inhibitor switch connector. Connector & terminal (T3) No. 3 - (T7) No. 2: (T3) No. 2 - (T7) No. 5: (T3) No. 1 - (T7) No. 3: (T3) No. 8 - (T7) No. 4: (T3) No. 4 - (T7) No. 1 | Is each resistance less than 1 ohms? | Go to step 5 . | Repair the open circuit of harness. |
| 5 CHECK INHIBITOR SWITCH. Move the select lever to each range, and measure the resistance between inhibitor switch connector terminals Connector & terminal (T7) No. 2 - (T7) No. 1: (T7) No. 5 - (T7) No. 1: (T7) No. 3 - (T7) No. 1: (T7) No. 4 - (T7) No. 1 | Is the resistance of the corresponding range less than 1 Mohms? | Go to step 6 . | Replace the inhibitor switch. Ref. to INHIBITOR SWITCH . |
| 6 CHECK HARNESS. Turn the ignition switch to ON. Measure the voltage between each connector and chassis ground. Connector & terminal Transmission connector (B12 side) (B12) No. 3 (+) - Chassis ground (-): (B12) No. 2 (+) - Chassis ground (-): (B12) No. 1 (+) - Chassis ground (-): (B12) No. 8 (+) - Chassis ground (-): (B12) No. 4 (+) - Chassis ground (-): Transmission connector (T7 side) (T7) No. 2 (+) - Chassis ground (-): (T7) No. 5 (+) - Chassis ground (-): (T7) No. 3 (+) - Chassis ground (-): (T7) No. 4 (+) - Chassis ground (-): (T7) No. 1 (+) - Chassis ground (-) | Is each voltage less than 1 V? | Go to step 7 . | Repair the harness which outputs 1 V or more. |
| 7 CHECK FOR POOR CONTACT. | Is there poor contact between TCM, inhibitor switch, transmission ground? | Repair the poor contact. | Check the TCM. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK HARNESS. Turn the ignition switch to ON. Measure the voltage between TCM connectors. Connector & terminal (B54) No. 3 (+) - (B54) No. 16 (-) | Is the voltage 5 V or more? | Repair the short circuit of harness. | Go to step 2 . |
| 2 CHECK HARNESS. Turn the ignition switch to OFF. Measure the resistance between TCM connector and transmission connectors. Connector & terminal (B54) No. 3 - (B11) No. 16: (B54) No. 16 - (B11) No. 19 | Is the resistance less than 1 ohms? | Go to step 3 . | Repair the open circuit of harness. |
| 3 CHECK ATF TEMPERATURE SENSOR. Turn the ignition switch to OFF. Connect the connectors to TCM and transmission. Start the engine. Warm up until the ATF temperature exceeds 50°C(122°F). Turn the ignition switch to OFF. Disconnect the transmission connector. Measure the resistance between transmission connector terminals. Connector & terminal (T4) No. 16 - No. 19 | Is the resistance 730 - 1120 ohms? | Go to step 4 . | Go to step 6 . |
| 4 CHECK ATF TEMPERATURE SENSOR. Measure the resistance between transmission connector terminals. Connector & terminal (T4) No. 16 - No. 19 | Does the resistance value increase gradually while the ATF temperature decreases? | Go to step 5 . | Replace the transmission harness. |
| 5 CHECK INPUT SIGNAL FOR TCM. Connect the connector to transmission. Turn the ignition switch to ON. (Do not start engine.) Read the data of ATF temperature using Subaru Select Monitor. | Does the ATF temperature gradually decrease? | Check for poor contact of the ATF temperature sensor and transmission connector harness, and repair the fault location. | Go to step 6 . |
| 6 CHECK FOR POOR CONTACT. | Is there poor contact of ATF temperature sensor circuit? | Repair the poor contact. | Check the TCM. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK STOP LIGHT SWITCH. Turn the ignition switch to OFF. Disconnect the stop light switch connector. Measure the resistance of harness between stop light switch connectors. Connector & terminal (B65) No. 2 - No. 3 | Is the resistance 1 Mohms or more? | Go to step 2 . | Replace the stop light switch. |
| 2 CHECK HARNESS. Disconnect the TCM connector. Turn the ignition switch to ON. Measure the voltage between TCM connector and chassis ground. Connector & terminal (B55) No. 13 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Repair the short circuit of harness. | Go to step 3 . |
| 3 CHECK INPUT SIGNAL FOR TCM. Connect the TCM and stop light switch connector. Turn the ignition switch to ON. Read the data of "Stop Light Switch" using Subaru Select Monitor. | Is "OFF" displayed? | Current condition is normal. Check for poor contact of the connector or harness, and repair the fault location. | Go to step 4 . |
| 4 CHECK FOR POOR CONTACT. | Is there poor contact of input signal of stop light switch? | Repair the poor contact. | Check the TCM. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK INPUT SIGNAL FOR TCM. Start the engine. Warm up until the ATF temperature reaches to 40 - 70°C (104- 158°F). Shift the select lever to "P" range. Stabilize the engine speed at idle. Read the data of "Actual secondary pressure" using Subaru Select Monitor. | Is "Actual secondary pressure" 0.5 - 1.5 MPa? | Check for poor contact of connector. | Go to step 2 . |
| 2 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and transmission connectors. Turn the ignition switch to ON. Measure the voltage between TCM connector and chassis ground. Connector & terminal (B54) No. 2 (+) - Chassis ground (-): (B54) No. 17 (+) - Chassis ground (-) | Is the voltage approx. 0 V? | Go to step 3 . | Repair the short circuit of harness. |
| 3 CHECK HARNESS. Turn the ignition switch to OFF. Measure the resistance between TCM connector terminals. Connector & terminal (B54) No. 2 - (B54) No. 17 | Is the resistance less than 1 ohms? | Repair the short circuit of harness. | Go to step 4 . |
| 4 CHECK TRANSMISSION HARNESS. Disconnect the secondary pressure sensor connector. Turn the ignition switch to ON. Measure the voltage between transmission connector and chassis ground. Connector & terminal (T4) No. 14 (+) - Chassis ground (-): (T4) No. 17 (+) - Chassis ground (-) | Is the voltage approx. 0 V? | Go to step 5 . | Repair the short circuit of harness. |
| 5 CHECK TRANSMISSION HARNESS. Turn the ignition switch to OFF. Measure the resistance between transmission connector terminals. Connector & terminal (T4) No. 14 - (T4) No. 17 | Is the resistance less than 1 ohms? | Repair the short circuit of harness. | Go to step 6 . |
| 6 CHECK SENSOR POWER SUPPLY. Connect the connectors of TCM and transmission. Turn the ignition switch to ON. Measure the voltage between secondary pressure sensor connector terminals. Connector & terminal (AT6) No. 1 (+) - (AT6) No. 3 (-) | Is the voltage 4.5 V or more? | Replace the secondary pressure sensor. Ref. to SECONDARY PRESSURE SENSOR . | Check for poor contact of the connector, and repair the fault location. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK INPUT SIGNAL FOR TCM. After driving with warm up condition, park the vehicle while depressing the brake at "N" range. Read the data of "Sec. Sol. Set Current" and "Sec. Sol. Actual Current" using Subaru Select Monitor. | Does the value of "Sec. Sol. Set Current" and "Sec. Sol. Actual Current" almost correspond? | Check for poor contact of connector. | Go to step 2 . |
| 2 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and transmission connectors. Measure the resistance between TCM connector and transmission connectors. Connector & terminal (B54) No. 12 - (B11) No. 5 | Is the resistance less than 1 ohms? | Go to step 3 . | Repair the open circuit of harness. |
| 3 CHECK HARNESS. Turn the ignition switch to ON. Measure the voltage between TCM connector and chassis ground. Connector & terminal (B54) No. 12 (+) - Chassis ground (-) | Is the voltage approx. 0 V? | Go to step 4 . | Repair the short circuit of harness. |
| 4 CHECK SECONDARY SOLENOID. Measure the resistance between transmission connector and transmission body. Connector & terminal (T4) No. 5 - Transmission body | Is the resistance approx. 7 ohms? (when engine cold) | Check for poor contact of the connector, and repair the fault location. | Go to step 5 . |
| 5 CHECK HARNESS INSIDE TRANSMISSION. CAUTION: Start work after ATF cools down. Remove the transmission oil pan. Check for the harness pinch, damage. | Is there any malfunction in harness? | Go to step 6 . | Replace the transmission harness. |
| 6 CHECK HARNESS INSIDE TRANSMISSION. Disconnect the control valve body connector. Turn the ignition switch to ON. Measure the voltage between transmission connector and transmission body. Connector & terminal (T4) No. 5 (+) - Transmission body (-) | Is the voltage approx. 0 V? | Replace the control valve body. Ref. to CONTROL VALVE BODY . | Replace the transmission harness. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK INPUT SIGNAL FOR TCM. After driving with warm up condition, park the vehicle while depressing the brake at "D" range. Read the data of "Commanded Forward & Reverse Linear Solenoid Current" and "Actual Forward & Reverse Linear Solenoid Current" using Subaru Select Monitor. | Does the value of "Commanded Forward & Reverse Linear Solenoid Current" and "Actual Forward & Reverse Linear Solenoid Current" almost correspond? | Check for poor contact of connector. | Go to step 2 . |
| 2 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and transmission connectors. Measure the resistance between TCM connector and transmission connectors. Connector & terminal (B54) No. 11 - (B11) No. 9 | Is the resistance less than 1 ohms? | Go to step 3 . | Repair the open circuit of harness. |
| 3 CHECK HARNESS. Turn the ignition switch to ON. Measure the voltage between TCM connector and chassis ground. Connector & terminal (B54) No. 11 (+) - Chassis ground (-) | Is the voltage approx. 0 V? | Go to step 4 . | Repair the short circuit of harness. |
| 4 CHECK F&R SOLENOID. Measure the resistance between transmission connector and transmission body. Connector & terminal (T4) No. 9 - Transmission body | Is the resistance approx. 6 ohms? (when engine cold) | Check for poor contact of the connector, and repair the fault location. | Go to step 5 . |
| 5 CHECK HARNESS INSIDE TRANSMISSION. CAUTION: Start work after ATF cools down. Remove the transmission oil pan. Check for the harness pinch, damage. | Is there any malfunction in harness? | Go to step 6 . | Replace the transmission harness. |
| 6 CHECK HARNESS INSIDE TRANSMISSION. Disconnect the control valve body connector. Turn the ignition switch to ON. Measure the voltage between transmission connector and transmission body. Connector & terminal (T4) No. 9 (+) - Transmission body (-) | Is the voltage approx. 0 V? | Replace the control valve body. Ref. to CONTROL VALVE BODY . | Replace the transmission harness. |
| CAUTION |
|---|
| Start work after ATF cools down. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and transmission connectors. Measure the resistance between TCM connector and transmission connectors. Connector & terminal (B54) No. 13 - (B11) No. 4 | Is the resistance less than 1 ohms? | Go to step 2 . | Repair the open circuit of harness. |
| 2 CHECK HARNESS. Turn the ignition switch to ON. Measure the voltage between TCM connector and chassis ground. Connector & terminal (B54) No. 13 (+) - Chassis ground (-) | Is the voltage approx. 0 V? | Go to step 3 . | Repair the short circuit of harness. |
| 3 CHECK AWD SOLENOID. Measure the resistance between transmission connector and transmission body. Connector & terminal (T4) No. 4 - Transmission body | Is the resistance approx. 4 ohms? (when engine cold) | Check for poor contact of the connector, and repair the fault location. | Go to step 4 . |
| 4 CHECK HARNESS INSIDE TRANSMISSION. CAUTION: Start work after ATF cools down. Remove the transmission oil pan. Check for the harness pinch, damage. | Is there any malfunction in harness? | Go to step 5 . | Replace the transmission harness. |
| 5 CHECK HARNESS INSIDE TRANSMISSION. Disconnect the control valve body connector. Turn the ignition switch to ON. Measure the voltage between transmission connector and transmission body. Connector & terminal (T4) No. 4 (+) - Transmission body (-) | Is the voltage approx. 0 V? | Replace the control valve body. Ref. to CONTROL VALVE BODY . | Replace the transmission harness. |
| CAUTION |
|---|
| Start work after ATF cools down. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and transmission connectors. Measure the resistance between TCM connector and transmission connectors. Connector & terminal (B54) No. 24 - (B11) No. 6 | Is the resistance less than 1 ohms? | Go to step 2 . | Repair the open circuit of harness. |
| 2 CHECK HARNESS. Turn the ignition switch to ON. Measure the voltage between TCM connector and chassis ground. Connector & terminal (B54) No. 24 (+) - Chassis ground (-) | Is the voltage approx. 0 V? | Go to step 3 . | Repair the short circuit of harness. |
| 3 CHECK PRIMARY UP SOLENOID. Measure the resistance between transmission connector and transmission body. Connector & terminal (T4) No. 6 - Transmission body | Is the resistance approx. 13 ohms? (when engine cold) | Check for poor contact of the connector, and repair the fault location. | Go to step 4 . |
| 4 CHECK HARNESS INSIDE TRANSMISSION. CAUTION: Start work after ATF cools down. Remove the transmission oil pan. Check for the harness pinch, damage. | Is there any malfunction in harness? | Go to step 5 . | Replace the transmission harness. |
| 5 CHECK HARNESS INSIDE TRANSMISSION. Disconnect the control valve body connector. Turn the ignition switch to ON. Measure the voltage between transmission connector and transmission body. Connector & terminal (T4) No. 6 (+) - Transmission body (-) | Is the voltage approx. 0 V? | Replace the control valve body. Ref. to CONTROL VALVE BODY . | Replace the transmission harness. |
| CAUTION |
|---|
| Start work after ATF cools down. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and transmission connectors. Measure the resistance between TCM connector and transmission connectors. Connector & terminal (B54) No. 25 - (B11) No. 1 | Is the resistance less than 1 ohms? | Go to step 2 . | Repair the open circuit of harness. |
| 2 CHECK HARNESS. Turn the ignition switch to ON. Measure the voltage between TCM connector and chassis ground. Connector & terminal (B54) No. 25 (+) - Chassis ground (-) | Is the voltage approx. 0 V? | Go to step 3 . | Repair the short circuit of harness. |
| 3 CHECK PRIMARY DOWN SOLENOID. Measure the resistance between transmission connector and transmission body. Connector & terminal (T4) No. 1 - Transmission body | Is the resistance approx. 13 ohms? (when engine cold) | Check for poor contact of the connector, and repair the fault location. | Go to step 4 . |
| 4 CHECK HARNESS INSIDE TRANSMISSION. CAUTION: Start work after ATF cools down. Remove the transmission oil pan. Check for the harness pinch, damage. | Is there any malfunction in harness? | Go to step 5 . | Replace the transmission harness. |
| 5 CHECK HARNESS INSIDE TRANSMISSION. Disconnect the control valve body connector. Turn the ignition switch to ON. Measure the voltage between transmission connector and transmission body. Connector & terminal (T4) No. 1 (+) - Transmission body (-) | Is the voltage approx. 0 V? | Replace the control valve body. Ref. to CONTROL VALVE BODY . | Replace the transmission harness. |
| CAUTION |
|---|
| Start work after ATF cools down. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and transmission connectors. Measure the resistance between TCM connector and chassis ground. Connector & terminal (B54) No. 26 - Chassis ground | Is the resistance 1 Mohms or more? | Go to step 2 . | Repair the short circuit of harness. |
| 2 CHECK LOCK-UP DUTY SOLENOID. Measure the resistance between transmission connector and transmission body. Connector & terminal (T4) No. 2 - Transmission body | Is the resistance approx. 13 ohms? (when engine cold) | Check for poor contact of the connector, and repair the fault location. | Go to step 3 . |
| 3 CHECK HARNESS INSIDE TRANSMISSION. CAUTION: Start work after ATF cools down. Remove the transmission oil pan. Check for the harness pinch, damage. | Is there any malfunction in harness? | Go to step 4 . | Replace the transmission harness. |
| 4 CHECK HARNESS INSIDE TRANSMISSION. Disconnect the control valve body connector. Measure the resistance between transmission connector and transmission body. Connector & terminal (T4) No. 2 - Transmission body | Is the resistance 1 Mohms or more? | Replace the control valve body. Ref. to CONTROL VALVE BODY . | Replace the transmission harness. |
| CAUTION |
|---|
| Start work after ATF cools down. |
DIAGNOSTIC PROCEDURE
| Step | Check | Yes | No |
|---|---|---|---|
| 1 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and transmission connectors. Measure the resistance between TCM connector and transmission connectors. Connector & terminal (B54) No. 23 - (B11) No. 3 | Is the resistance less than 1 ohms? | Go to step 2 . | Repair the open circuit of harness. |
| 2 CHECK HARNESS. Turn the ignition switch to ON. Measure the voltage between TCM connector and chassis ground. Connector & terminal (B54) No. 23 (+) - Chassis ground (-) | Is the voltage approx. 0 V? | Go to step 3 . | Repair the short circuit of harness. |
| 3 CHECK LOCK UP ON/OFF SOLENOID. Measure the resistance between transmission connector and transmission body. Connector & terminal (T4) No. 3 - Transmission body | Is the resistance approx. 17 ohms? (when engine cold) | Check for poor contact of the connector, and repair the fault location. | Go to step 4 . |
| 4 CHECK HARNESS INSIDE TRANSMISSION. CAUTION: Start work after ATF cools down. Remove the transmission oil pan. Check for the harness pinch, damage. | Is there any malfunction in harness? | Go to step 5 . | Replace the transmission harness. |
| 5 CHECK HARNESS INSIDE TRANSMISSION. Disconnect the control valve body connector. Turn the ignition switch to ON. Measure the voltage between transmission connector and transmission body. Connector & terminal (T4) No. 3 (+) - Transmission body (-) | Is the voltage approx. 0 V? | Replace the control valve body. Ref. to CONTROL VALVE BODY . | Replace the transmission harness. |
| CAUTION |
|---|
| Start work after ATF cools down. |
DIAGNOSTIC PROCEDURE