AUTOMATIC TRANSMISSION (DIAGNOSTICS)(4AT) > Diagnostic Procedure without Diagnostic Trouble Code (DTC)

CHECK SPORT SHIFT SWITCH

DIAGNOSIS:

Input signal circuit of SPORT shift switch is open or shorted.

TROUBLE SYMPTOM:

Does not shift on manual mode.

WIRING DIAGRAM:

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1.CHECK SPORT SHIFT SWITCH.

1) Shift the select lever to SPORT shift mode.

2) Shift and hold the select lever to up side.

3) Read the “Up Switch” data using Subaru Select Monitor.

Is ON displayed?

2.CHECK SPORT SHIFT SWITCH.

1) Shift and hold the select lever to down side.

2) Read the “Down Switch” data using Subaru Select Monitor.

Is ON displayed?

3.CHECK SPORT SHIFT SWITCH GROUND CIRCUIT.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from the SPORT shift switch.

3) Measure the resistance of harness between SPORT shift switch connector and chassis ground.

Connector & terminal

(B117) No. 6 — Chassis ground:

Is the resistance less than 1 Ω?

Repair the open circuit of harness between the SPORT shift switch and chassis ground.

4.CHECK SPORT SHIFT SWITCH.

Measure the resistance between SPORT shift switch terminals.

Connector & terminal

(B117) No. 6 — No. 5:

Is the resistance 1 MΩ or more?

Replace the guide plate assembly.

5.CHECK SPORT SHIFT SWITCH.

1) Shift the select lever to SPORT shift mode.

2) Hold the select lever to the shift up side, and measure the resistance between SPORT shift switch terminals.

Connector & terminal

(B117) No. 6 — No. 5:

Is the resistance less than 1 Ω?

Replace the guide plate assembly.

6.CHECK HARNESS CONNECTOR BETWEEN TCM AND SPORT SHIFT SWITCH.

1) Disconnect the connector from TCM.

2) Measure the resistance of harness between TCM connector and SPORT shift switch connector.

Connector & terminal

(B117) No. 5 — (B54) No. 19:

Is the resistance less than 1 Ω?

Repair the open circuit of harness between SPORT shift switch connector and TCM connector, or poor contact in connector.

7.CHECK HARNESS CONNECTOR BETWEEN TCM AND SPORT SHIFT SWITCH.

Measure the resistance of harness between SPORT shift switch connector and chassis ground.

Connector & terminal

(B117) No. 5 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the short circuit of harness between SPORT shift switch connector and TCM connector.

8.CHECK INPUT SIGNAL TO TCM.

1) Connect all connectors.

2) Turn the ignition switch to ON.

3) Measure the voltage of signal to TCM.

Connector & terminal

(B54) No. 19 (+) — Chassis ground (−):

Is the voltage 9 V or more?

Replace the TCM.

9.CHECK INPUT SIGNAL TO TCM.

1) Hold the select lever to shift up side.

2) Measure the voltage of signal to TCM.

Connector & terminal

(B54) No. 19 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Replace the TCM.

10.CHECK SPORT SHIFT SWITCH GROUND CIRCUIT.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from the SPORT shift switch.

3) Measure the resistance of harness between SPORT shift switch connector and chassis ground.

Connector & terminal

(B117) No. 10 — Chassis ground:

Is the resistance less than 1 Ω?

Repair the open circuit of harness between the SPORT shift switch and chassis ground.

11.CHECK SPORT SHIFT SWITCH.

Measure the resistance between SPORT shift switch terminals.

Connector & terminal

(B117) No. 10 — No. 9:

Is the resistance 1 MΩ or more?

Replace the guide plate assembly.

12.CHECK SPORT SHIFT SWITCH.

1) Shift the select lever to SPORT shift mode side.

2) Hold the select lever to the shift down side, and measure the resistance between SPORT shift switch terminals.

Terminals

No. 10 — No. 9:

Is the resistance less than 1 Ω?

Replace the guide plate assembly.

13.CHECK HARNESS CONNECTOR BETWEEN TCM AND SPORT SHIFT SWITCH.

1) Disconnect the connector from TCM.

2) Measure the resistance of harness between TCM connector and SPORT shift switch connector.

Connector & terminal

(B117) No. 9 — (B54) No. 18:

Is the resistance less than 1 Ω?

Repair the open circuit of harness between SPORT shift switch connector and TCM connector, or poor contact in connector.

14.CHECK HARNESS CONNECTOR BETWEEN TCM AND SPORT SHIFT SWITCH.

Measure the resistance of harness between SPORT shift switch connector and chassis ground.

Connector & terminal

(B117) No. 9 — Chassis ground:

Is the resistance 1 MΩ or more?

Repair the short circuit of harness between SPORT shift switch connector and TCM connector.

15.CHECK INPUT SIGNAL TO TCM.

1) Connect all connectors.

2) Turn the ignition switch to ON.

3) Measure the voltage of signal to TCM.

Connector & terminal

(B54) No. 18 (+) — Chassis ground (−):

Is the voltage 9 V or more?

Replace the TCM.

16.CHECK INPUT SIGNAL TO TCM.

1) Hold the select lever to down side.

2) Measure the voltage of signal to TCM.

Connector & terminal

(B54) No. 18 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Replace the TCM.

17.CHECK POOR CONTACT.

Is there poor contact in the SPORT shift switch circuit?

Repair the poor contact.

Temporary poor contact of the SPORT shift switch circuit connector or harness