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

Subaru Crosstrek Service Manual / Engine (diagnostics)(h4do) / Diagnostic procedure for subaru select monitor communication Communication for initializing impossible

ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure for Subaru Select Monitor Communication

COMMUNICATION FOR INITIALIZING IMPOSSIBLE

DIAGNOSIS:

Open or short circuit in data link connector

TROUBLE SYMPTOM:

Subaru Select Monitor communication failure

WIRING DIAGRAM:

Engine electrical system Engine Electrical System">

STEPCHECKYESNO

1.CHECK POWER SUPPLY CIRCUIT.

Connect DST-i or general scan tool to data link connector.

Does DST-i or the general scan tool turn ON?

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE">Go to Step 4.

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE">Go to Step 2.

2.CHECK POWER SUPPLY CIRCUIT.

Measure the voltage between data link connector and chassis ground.

Connector & terminal

(B40) No. 16 (+) — Chassis ground (−):

Is the voltage 10 V or more?

Diagnostic Procedure for Subaru Select Monitor Communication > COMMUNICATION FOR INITIALIZING IMPOSSIBLE">Go to Step 3.

Repair the power supply circuit.

NOTE:

In this case, repair the following item:

Open or ground short circuit of harness between battery and data link connector

Blown out of fuse (M/B No. 13)

3.CHECK HARNESS BETWEEN DATA LINK CONNECTOR AND CHASSIS GROUND.

1) Turn the ignition switch to OFF.

2) Measure the resistance of harness between data link connector and chassis ground.

Connector & terminal

(B40) No. 4 — Chassis ground:

(B40) No. 5 — Chassis ground:

Is the resistance less than 5 ??

Repair the poor contact of data link connector.

Repair the harness and connector.

NOTE:

In this case, repair the following item:

Open circuit in harness between ECM connector and data link connector

Open circuit of harness between ECM connector and engine ground

Poor contact of ECM connector

Poor contact of coupling connector

4.CHECK HARNESS BETWEEN ECM AND DATA LINK CONNECTOR.

Measure the resistance between data link connector and chassis ground.

Connector & terminal

(B40) No. 7 — Chassis ground:

Is the resistance 1 M? or more?

Repair the poor contact of the ECM or data link connector.

Repair the short circuit to ground in harness between ECM connector and data link connector.

Data link connector Note
ENGINE (DIAGNOSTICS)(H4DO) > Data Link ConnectorNOTEThis connector is used for Subaru Select Monitor.CAUTION:Do not connect any scan tools other than Subaru Select Monitor or general scan tool beca ...

Drive cycle Procedure
ENGINE (DIAGNOSTICS)(H4DO) > Drive CyclePROCEDUREIt is necessary to perform the drive cycle listed below if DTC is not found in the Inspection Mode. It is possible to complete diagnosis of the DTC ...

Other materials:

Inspection
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Inspection
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Dtc p013a o2 sensor slow response - rich to lean bank 1 sensor 2
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P013A O2 SENSOR SLOW RESPONSE - RICH TO LEAN BANK 1 SENSOR 2DTC detecting condition:Detected when two consecutive driving cycles with fault occur.CAUTION:After servicing or replacing faulty parts, perform Clea ...

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