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Subaru Crosstrek Service Manual: Dtc b14ea intake door actuator circuit short-circuit

HVAC SYSTEM (AUTO A/C) (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC B14EA INTAKE DOOR ACTUATOR CIRCUIT SHORT-CIRCUIT

DTC detecting condition:

Intake door actuator potentiometer circuit is shorted.

Trouble symptom:

FRESH/RECIRC does not operate.

Wiring diagram:

Air conditioning system Air Conditioning System > WIRING DIAGRAM">

STEPCHECKYESNO

1.CHECK CONNECTOR.

1) Check the condition of connector connection.

2) Read the DTC using Subaru Select Monitor. Read Diagnostic Trouble Code (DTC)">

Is B14EA displayed?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14EA INTAKE DOOR ACTUATOR CIRCUIT SHORT-CIRCUIT">Go to Step 2.

Even if DTC is displayed, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

NOTE:

In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.

2.CHECK ACTUATOR.

1) Turn the ignition switch to ON.

2) Using the tester, measure the voltage between terminals.

Connector & terminal

(B163) No. 4 (+) — No. 6 (–):

Is the voltage 4.5 — 5.0 V?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14EA INTAKE DOOR ACTUATOR CIRCUIT SHORT-CIRCUIT">Go to Step 3.

Repair or replace the open circuit of harness.

3.CHECK HARNESS (OPEN CIRCUIT).

1) Turn the ignition switch to OFF.

2) Using a tester, check continuity between terminals.

Connector & terminal

(B163) No. 4 — (i88) No. 10:
(B163) No. 5 — (i88) No. 12:
(B163) No. 6 — (i88) No. 14:

Is there continuity?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14EA INTAKE DOOR ACTUATOR CIRCUIT SHORT-CIRCUIT">Go to Step 4.

Repair or replace the open circuit of harness.

4.CHECK ACTUATOR.

1) Turn the ignition switch to ON.

2) Using the tester, measure the voltage between terminals.

Connector & terminal

(B163) No. 5 (+) — No. 6 (–):

Is the voltage 0.5 — 4.5 V?

Replace the A/C control panel. Control Panel > REMOVAL">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14EA INTAKE DOOR ACTUATOR CIRCUIT SHORT-CIRCUIT">Go to Step 5.

5.CHECK HARNESS (SHORTED BETWEEN LINES).

1) Turn the ignition switch to OFF.

2) Using the tester, measure the resistance between terminals.

Connector & terminal

(B163) No. 5 — No. 6:

Is the resistance less than 1 ??

Repair or replace the short circuit of the harness.

Replace the actuator. FRESH/RECIRC Door Actuator > REMOVAL">

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