Subaru Crosstrek Service Manual: 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">
| STEP | CHECK | YES | NO |
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:
Power saving function
The keyless access function will be
disabled in the following cases to protect
the access key battery and the vehicle
battery.
Case 1: When the keyless access function and the remote keyless entry
system have not been used for 2 weeks
or longer while all doors are locked
To recover the ...
Driving tips
Always apply the foot or parking brake
when the vehicle is stopped in the "D" or
"R" position.
Make sure to apply the parking brake
when parking your vehicle. Do not hold
the vehicle with only the mechanical
friction of the transmission.
Do not keep the vehicle in a stationary
pos ...
Function settings
A SUBARU dealer can change the settings of the functions shown in the
following table to meet your personal requirements. Contact
the nearest SUBARU dealer for details. If your vehicle is equipped with a multi
function display, the settings for some of these functions
can be changed using the ...
