Subaru Crosstrek Service Manual: Dtc b14e5 mode door actuator stepping motor circuit open

DTC detecting condition:

Mode door actuator stepping motor circuit is open.

Trouble symptom:

Vent does not change.

Wiring diagram:

Air conditioning system Air Conditioning System > WIRING DIAGRAM">

1.CHECK CONNECTOR.

1) Check the condition of connector connection.

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

Is B14E5 displayed?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14E5 MODE DOOR ACTUATOR STEPPING MOTOR CIRCUIT OPEN">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 OFF.

2) Disconnect the mode door actuator connector.

3) Turn the ignition switch to ON.

4) Measure the voltage between the mode door actuator connector terminal and chassis ground.

Connector & terminal

(B77) No. 3 (+) — Chassis ground (−):

Is the voltage approx. 10 V or more?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14E5 MODE DOOR ACTUATOR STEPPING MOTOR CIRCUIT OPEN">Go to Step 3.

Check the DC power supply circuit.

3.CHECK AIR MIX DOOR ACTUATOR.

1) Turn the ignition switch to OFF.

2) Measure the resistance between mode door actuator terminals using a tester.

Connector & terminal

(B77) No. 3 — No. 1:

(B77) No. 3 — No. 2:

(B77) No. 3 — No. 5:

(B77) No. 3 — No. 6:

Is the resistance 80 — 100 ??

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B14E5 MODE DOOR ACTUATOR STEPPING MOTOR CIRCUIT OPEN">Go to Step 4.

Replace the actuator. Mode Door Actuator > REMOVAL">

4.CHECK HARNESS BETWEEN A/C CONTROL PANEL AND MODE DOOR ACTUATOR (OPEN).

1) Disconnect the A/C control panel connector.

2) Measure the resistance between A/C control panel and air mix door actuator connector.

Connector & terminal

(B77) No. 1 — (i88) No. 4:
(B77) No. 2 — (i88) No. 3:
(B77) No. 5 — (i88) No. 2:
(B77) No. 6 — (i88) No. 1:

Is there continuity?

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

Repair or replace the open circuit of harness.

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