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Subaru Legacy BN/BS (2015-2019) Service Manual: Inspection

Subaru Legacy BN/BS (2015-2019) Service Manual / Infotainment system (diagnostics) / Subaru select monitor / Inspection

1. COMMUNICATION FOR INITIALIZING IMPOSSIBLE

When communication with the navigation unit is impossible

DETECTING CONDITION:

• Defective harness connector

• Power supply circuit malfunction

• Infotainment system module malfunction

• Defective CAN communication circuit

• Defective Subaru Select Monitor

TROUBLE SYMPTOM:

Communication is impossible between the infotainment system module and Subaru Select Monitor.

WIRING DIAGRAM:

NOTE:

For the coupling connector, refer to “WIRING SYSTEM”.

• Audio system Audio System > WIRING DIAGRAM

• Navigation system Navigation System > WIRING DIAGRAM

STEPCHECKYESNO

1.CHECK OTHER COMMUNICATION.

Communicate with the system other than the infotainment system using the Subaru Select Monitor.

Is the communication to other control module possible-

Subaru Select Monitor > INSPECTION

Perform the “Communication for Initializing Impossible” of LAN system.

2.CHECK LAN SYSTEM.

Inspect LAN system. Basic Diagnostic Procedure > PROCEDURE

Is there any fault-

Perform the inspection according to the diagnosis for LAN system.

Subaru Select Monitor > INSPECTION

3.CHECK FUSE.

Check the fuse of the infotainment system. Relay and Fuse > LOCATION

Is it normal-

Subaru Select Monitor > INSPECTION

Replace the fuse. If the replaced fuse blows out easily, repair the ground short circuit of the harness between the battery and audio (7-inch display) connector, or between the navigation unit connector.

4.CHECK HARNESS.

1) Turn off the audio (7-inch display) or navigation unit.

2) Disconnect the audio (7-inch display) connector or navigation unit connector.

3) Turn the ignition switch to ON.

4) Using the tester, measure the voltage between audio (7-inch display) connector or navigation unit connector and chassis ground.

Connector & terminal

(i85) No. 4 (+) — Chassis ground (−): (without power amplifier)

(i35) No. 4 (+) — Chassis ground (−): (with power amplifier)

(i87) No. 1 (+) — Chassis ground (−):

Is the voltage 10 — 13 V-

Subaru Select Monitor > INSPECTION

Repair the open circuit of harness between audio (7-inch display) connector or navigation unit connector and fuse.

5.CHECK INFOTAINMENT SYSTEM MODULE.

1) Turn the ignition switch to OFF.

2) Connect the audio (7-inch display) connector or navigation unit connector.

3) Perform the communication with the infotainment system.

Is communication possible-

It is possible that temporary poor communication occurs.

Replace the audio (7-inch display) or navigation unit. Audio Navigation Body

Operation
• For detailed operation procedures, refer to “Application help”.• When the infotainment cannot communicate with Subaru Select Monitor, perform “COMMUNICATION FOR INITIAL ...

Instrumentation driver info
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Other materials:

Inspection
1. CHECK FUSE1. Remove the fuse and inspect visually.2. If the fuse is blown out, replace the fuse.2. CHECK RELAY1. Measure the resistance between relay terminals.Terminal No.Inspection conditionsStandardCircuit1 — 2Always1 M- or more1 — 4AlwaysLess than 1 -1 — 2Apply battery voltage between t ...

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