WIRING DIAGRAM
| Step | Check | Yes | No |
|---|
| 1 CHECK HARNESS CONNECTOR BETWEEN TCM AND ATF TEMPERATURE SENSOR. Turn the ignition switch to OFF. Disconnect the connector from TCM. Measure the resistance between TCM connector terminals. Connector & Terminal (B55) No.23 - No.12 | Is the resistance 500 ohms or more? | Go to step 2. | Go to step 4 . |
| 2 CHECK HARNESS CONNECTOR BETWEEN TCM AND ATF TEMPERATURE SENSOR. Measure the resistance of harness between TCM connector and chassis ground. Connector & Terminal (B55) No. 23 - Chassis ground | Is the resistance 1 Mohms or more? | Go to step 3. | Go to step 4 . |
| 3 CHECK HARNESS. Measure the resistance between TCM connector terminals while shaking the harness. Connector & Terminal (B55) No.23 - No.12 | Does the resistance change? | Go to step 4. | Replace the TCM. Refer to TRANSMISSION CONTROL MODULE (TCM) . |
| 4 CHECK HARNESS CONNECTOR BETWEEN TCM AND ATF TEMPERATURE SENSOR. Turn the ignition switch to OFF. Disconnect the connector from transmission. Measure the resistance of harness between TCM connector and chassis ground. Connector & Terminal (B55) No. 12 - Chassis ground: (B55) No. 23 - Chassis ground | Is the resistance 1 Mohms or more? | Go to step 5. | Repair the short circuit of harness between TCM and transmission harness. |
| 5 CHECK ATF TEMPERATURE SENSOR. Measure the resistance between transmission connector terminals. Connector & Terminal (T4) No. 11 - No. 15 | Is the resistance 500 ohms or more? | Check short circuits in harnesses or connectors, and repair the defective part. | Go to step 6 . |
| 6 CHECK TRANSMISSION HARNESS. Lift up the vehicle. Drain the automatic transmission fluid. CAUTION: Do not drain ATF until it cools down. Remove the oil pan. Disconnect the harness connector from control valve. Measure the resistance between transmission connector and transmission ground. Connector & Terminal (T4) No. 11 - Transmission ground: (T4) No. 15 - Transmission ground | Is the resistance 1 Mohms or more? | Go to step 7. | Replace the transmission harness. |
| 7 CHECK ATF TEMPERATURE SENSOR. Measure the resistance between control valve connector terminals. Connector & Terminal (AT2) No.4 - No.9 | Is the resistance 500 ohms or more? | Check short circuits in harnesses or connectors, and repair the defective part. | Replace the control valve body. Refer to CONTROL VALVE BODY . |
| CAUTION |
|---|
| Do not drain ATF until it cools down. |
DIAGNOSTIC PROCEDURE CHART
| Step | Check | Yes | No |
|---|
| 1 CHECK DTC. | Is DTC of CAN communication displayed? | Perform the diagnosis according to DTC. | Go to step 2 . |
| 2 CHECK BODY INTEGRATED UNIT. Turn the ignition switch to "OFF". Connect the Subaru Select Monitor to data link connector. Turn the ignition switch to ON. Run the Subaru Select Monitor. Read the data of "Stop Light Switch" using Subaru Select Monitor. Refer to OPERATION , Subaru Select Monitor. | Is "OFF" displayed? | Go to step 3. | Go to step 4 . |
| 3 CHECK TCM. Read the data of "Stop Light Switch" using Subaru Select Monitor. Refer to OPERATION , Subaru Select Monitor. | Is "OFF" displayed? | Check for poor contact in connectors or harnesses, and repair the defective part. | Replace the TCM. Refer to TRANSMISSION CONTROL MODULE (TCM) . |
| 4 CHECK BODY INTEGRATED UNIT INPUT SIGNAL. Disconnect the harness connector of body integrated unit. Measure the voltage of harness between body integrated unit and stop light switch. Connector & Terminal (B280) No. 2 (+) - Chassis ground (-) | Is the voltage 10 V or more? | Go to step 5. | Go to step 7 . |
| 5 CHECK STOP LIGHT SWITCH. Turn the ignition switch to OFF. Disconnect the connector from stop light switch. Measure the resistance of harness between stop light switch connectors. Connector & Terminal 4 DOOR MODEL (B65) No.3 - No.4: 5 DOOR MODEL (B65) No.1 - No.2 | Is the resistance 1 MCI or more? | Go to step 6. | Replace the stop light switch. |
| 6 CHECK HARNESS CONNECTOR BETWEEN BODY INTEGRATED UNIT AND STOP LIGHT SWITCH. Turn the ignition switch to ON. Measure the voltage of harness between the body integrated unit and chassis ground. Connector & Terminal (B280) No. 2 (+) - Chassis ground (-) | Is the voltage less than 1 V? | Go to step 7. | Repair the short circuit of harness between TCM and stop light switch. |
| 7 CHECK POOR CONTACT. | Is there poor contact of input signal of brake switch? | Repair the poor contact. | Check body integrated unit. |
DIAGNOSTIC PROCEDURE CHART
| Step | Check | Yes | No |
|---|
| 1 CHECK BODY INTEGRATED UNIT. Turn the ignition switch to OFF. Connect the Subaru Select Monitor to data link connector. Turn the ignition switch to ON. Run the Subaru Select Monitor. Read the data of "SPORT Shift (buzzer)" of body integrated unit using Subaru Select Monitor. | Is "ON" displayed? | Replace the TCM. Refer to TRANSMISSION CONTROL MODULE (TCM) . | Go to step 2 . |
| 2 CHECK COMBINATION METER. Refer to INSPECTION , Combination Meter System. | Is the buzzer OK? | Refer to "Diagnostics with Phenomenon". Refer to DIAGNOSTICS WITH PHENOMENON . | Replace the combination meter assembly. Refer to COMBINATION METER . |
DIAGNOSTIC PROCEDURE CHART
