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Subaru Legacy Service Manual: Diagnostic procedure for subaru select monitor communication communication for initializing impossible

Subaru Legacy Service Manual / Continuously variable transmission (diagnostics) / Diagnostic procedure for subaru select monitor communication communication for initializing impossible

DIAGNOSIS:

Defective harness connector

TROUBLE SYMPTOM:

Subaru Select Monitor communication failure

WIRING DIAGRAM:

ENGINE TYPE FB

CVT control system CVT Control System > WIRING DIAGRAM

ENGINE TYPE EZ

CVT control system CVT Control System > WIRING DIAGRAM

STEPCHECKYESNO

1.CHECK IGNITION SWITCH.

Is the ignition switch ON-

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE

Turn the ignition switch to ON, and select the transmission using the Subaru Select Monitor.

2.CHECK BATTERY.

1) Turn the ignition switch to OFF.

2) Measure the battery voltage.

Is the voltage 11 V or more-

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE

Charge or replace the battery.

3.CHECK BATTERY TERMINAL.

Is there poor contact at battery terminal-

Repair or tighten the battery terminal.

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE

4.CHECK INSTALLATION OF TCM CONNECTOR.

Turn the ignition switch to OFF.

Is the TCM connector inserted into the TCM until the clamp locks-

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE

Insert the TCM connector to TCM.

5.CHECK LAN SYSTEM.

Perform the diagnosis for LAN system. Basic Diagnostic Procedure

Is there any fault in LAN system-

Perform the diagnosis according to DTC for LAN system. List of Diagnostic Trouble Code (DTC)

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE

6.CHECK SUBARU SELECT MONITOR COMMUNICATION.

1) Turn the ignition switch to ON.

2) Check whether communication to transmission system can be executed normally.

Is the system name displayed on Subaru Select Monitor-

Check DTC of TCM. Read Diagnostic Trouble Code (DTC)

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE

7.CHECK POWER SUPPLY CIRCUIT.

1) Turn the ignition switch to ON. (Engine OFF)

2) Measure the ignition power supply voltage between TCM connector and chassis ground.

Connector & terminal

ENGINE TYPE FB

(T10) No. 8 (+) — Chassis ground (−):
(T10) No. 24 (+) — Chassis ground (−):
(T10) No. 34 (+) — Chassis ground (−):
(T10) No. 40 (+) — Chassis ground (−):
(T10) No. 41 (+) — Chassis ground (−):

ENGINE TYPE EZ

(B54) No. 8 (+) — Chassis ground (−):
(B54) No. 24 (+) — Chassis ground (−):
(B54) No. 34 (+) — Chassis ground (−):
(B54) No. 40 (+) — Chassis ground (−):
(B54) No. 41 (+) — Chassis ground (−):

Is the voltage 10 — 13 V-

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE

Repair the open circuit of harness between TCM and battery.

8.CHECK HARNESS CONNECTOR BETWEEN TCM AND CHASSIS GROUND.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from TCM.

3) Measure the resistance of harness between TCM connector and chassis ground.

Connector & terminal

ENGINE TYPE FB

(T10) No. 26 — Chassis ground:
(T10) No. 42 — Chassis ground:

ENGINE TYPE EZ

(B54) No. 26 — Chassis ground:
(B54) No. 42 — Chassis ground:

Is the resistance less than 10 --

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE

Repair the open circuit of the TCM ground circuit and poor contact of connector.

9.CHECK POOR CONTACT OF CONNECTOR.

Is there poor contact of control module power supply, ground circuit and data link connector-

Repair the connector.

Replace the TCM. Transmission Control Module (TCM) Transmission Control Module (TCM)

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Other materials:

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