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

DIAGNOSIS:

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

TROUBLE SYMPTOM:

Does not shift on manual mode.

WIRING DIAGRAM:

STEP	CHECK	YES	NO
1.CHECK SPORT SHIFT INDICATOR. 1) Turn the ignition switch to ON. 2) Shift the select lever to SPORT mode. 3) Set the select lever to + side. 4) Read the SPORT shift indicator display in combination meter.	Is the gear position displayed?
2.CHECK SPORT SHIFT INDICATOR. Read the SPORT shift indicator display in combination meter.	Is “2” displayed?
3.CHECK BODY INTEGRATED UNIT.	Is DTC of CAN communication displayed?	Perform the diagnosis according to DTC.
4.CHECK TCM. Read the “Tiptronic Mode Switch” data using the Subaru Select Monitor.	Is “ON” displayed?
5.CHECK HARNESS CONNECTOR BETWEEN TCM AND SPORT SHIFT SWITCH. 1) Turn the ignition switch to OFF. 2) Disconnect the connectors from TCM and SPORT shift switch. 3) Measure the resistance of harness between TCM and SPORT shift switch. Connector & terminal (B54) No. 17 — (B117) No. 7:	Is the resistance less than 1 Ω?		Repair the open circuit of harness between TCM and SPORT shift switch.
6.CHECK SPORT SHIFT SWITCH. Measure the resistance between SPORT shift switch terminals. Connector & terminal (B117) No. 7 — No. 8:	Is the resistance less than 1 Ω?		Replace the guide plate assembly.
7.CHECK HARNESS CONNECTOR BETWEEN SPORT SHIFT SWITCH AND CHASSIS GROUND. Measure the resistance of harness between SPORT shift switch and chassis ground. Connector & terminal (B117) No. 8 — Chassis ground:	Is the resistance less than 1 Ω?		Repair the open circuit of harness between the SPORT shift switch and chassis ground.
8.CHECK FOR POOR CONTACT. Check poor contact of SPORT shift switch circuit.	Is there poor contact of the SPORT shift switch circuit?	Repair the poor contact.	Replace the TCM.
9.CHECK TCM. 1) Shift and hold the select lever to + side. 2) Read the “Up Switch” data using Subaru Select Monitor.	Is “ON” displayed?
10.CHECK HARNESS CONNECTOR BETWEEN TCM AND + SWITCH. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from TCM and + switch. 3) Measure the resistance of harness between TCM and + switch. Connector & terminal (B54) No. 19 — (B117) No. 5:	Is the resistance less than 1 Ω?		Repair the open circuit of harness between TCM and + switch.
11.CHECK + SWITCH. 1) Shift and hold the select lever to + side. 2) Measure the resistance between + switch terminals. Connector & terminal (B117) No. 5 — No. 6:	Is the resistance less than 1 Ω?		Replace the guide plate assembly.
12.CHECK HARNESS CONNECTOR BETWEEN + SWITCH AND CHASSIS GROUND. Measure the resistance of harness between + switch and chassis ground. Connector & terminal (B117) No. 6 — Chassis ground:	Is the resistance less than 1 Ω?		Repair the open circuit of harness between + switch and chassis ground.
13.CHECK FOR POOR CONTACT. Check poor contact of + switch circuit.	Is there poor contact of + switch circuit?	Repair the poor contact.	Replace the TCM.
14.CHECK TCM. 1) Set the select lever to the center position. (Tilt the select lever to SPORT mode, and release the hold.) 2) Read the “Up Switch” data using Subaru Select Monitor.	Is “OFF” displayed?	Perform the self-diagnosis of combination meter.
15.CHECK HARNESS CONNECTOR BETWEEN TCM AND + SWITCH. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from TCM and + switch. 3) Measure the resistance of harness between TCM and + switch. Connector & terminal (B54) No. 19 — Chassis ground:	Is the resistance 1 MΩ or more?		Repair the short circuit of harness between TCM and + switch.
16.CHECK + SWITCH. Measure the resistance between + switch terminals. Connector & terminal (B117) No. 5 — No. 6:	Is the resistance 1 MΩ or more?	Replace the TCM.	Replace the guide plate assembly.
17.CHECK SPORT SHIFT INDICATOR. 1) Set the select lever to − side. 2) Read the SPORT shift indicator display in combination meter.	Is “1” displayed?	Normal. Finish the diagnosis.
18.CHECK TCM. 1) Shift and hold the select lever to − side. 2) Read the “Down Switch” data using Subaru Select Monitor.	Is “ON” displayed?
19.CHECK HARNESS CONNECTOR BETWEEN TCM AND − SWITCH. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from TCM and − switch. 3) Measure the resistance of harness between TCM and − switch. Connector & terminal (B54) No. 18 — (B117) No. 9:	Is the resistance less than 1 Ω?		Repair the open circuit of harness between TCM and − switch.
20.CHECK − SWITCH. 1) Shift and hold the select lever to − side. 2) Measure the resistance between − switch terminals. Connector & terminal (B117) No. 9 — No. 10:	Is the resistance less than 1 Ω?		Replace the guide plate assembly.
21.CHECK HARNESS CONNECTOR BETWEEN − SWITCH AND CHASSIS GROUND. Measure the resistance of harness between − switch and chassis ground. Connector & terminal (B117) No. 10 — Chassis ground:	Is the resistance less than 1 Ω?		Repair the open circuit of harness between − switch and chassis ground.
22.CHECK FOR POOR CONTACT. Check poor contact of − switch circuit.	Is there poor contact of − switch circuit?	Repair the poor contact.	Replace the TCM.
23.CHECK TCM. 1) Set the select lever to the center position. (Tilt the select lever to SPORT mode, and release the hold.) 2) Read the “Down Switch” data using Subaru Select Monitor.	Is “OFF” displayed?	Perform the self-diagnosis of combination meter.
24.CHECK HARNESS CONNECTOR BETWEEN TCM AND − SWITCH. 1) Turn the ignition switch to OFF. 2) Disconnect the connector from TCM and − switch. 3) Measure the resistance of harness between TCM and − switch. Connector & terminal (B54) No. 18 — Chassis ground:	Is the resistance 1 MΩ or more?		Repair the short circuit of harness between TCM and − switch.
25.CHECK − SWITCH. Measure the resistance between − switch terminals. Connector & terminal (B117) No. 9 — No. 10:	Is the resistance 1 MΩ or more?	Replace the TCM.	Replace the guide plate assembly.