Subaru Crosstrek Service Manual: Dtc b1435 evaporator temperature sensor circuit short-circuit

DTC detecting condition:

Evaporator sensor circuit is shorted.

Trouble symptom:

Evaporator temperature is falsely recognized as high, and the compartment temperature is adjusted.

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 B1435 displayed?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1435 EVAPORATOR TEMPERATURE SENSOR 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 EVAPORATOR SENSOR.

1) Disconnect the evaporator sensor.

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

Is B1434 displayed?

Replace the evaporator sensor. Evaporator > REMOVAL">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1435 EVAPORATOR TEMPERATURE SENSOR CIRCUIT SHORT-CIRCUIT">Go to Step 3.

3.CHECK HARNESS.

1) Turn the ignition switch to ON.

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

Connector & terminal

(B88) No. 2 (+) — No. 1 (–):

Is the voltage 4.5 — 5.0 V?

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.

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1435 EVAPORATOR TEMPERATURE SENSOR CIRCUIT SHORT-CIRCUIT">Go to Step 4.

4.CHECK HARNESS (SHORTED BETWEEN LINES).

1) Disconnect the connector from the A/C control panel.

2) Using a tester, check continuity between terminals.

Connector & terminal

(B88) No. 1 — No. 2:

Is there continuity?

Repair or replace the short circuit of the harness.

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

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