DTC B1435: Evaporator Temperature Sensor Circuit Short-Circuit

DTC detecting condition:

Evaporator sensor circuit is shorted.

Trouble symptom:

Compressor does not operate.
Evaporator temperature is falsely recognized as high, and the compartment temperature is adjusted.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to AIR CONDITIONER (DIAGNOSTICS)>GENERAL DESCRIPTION>CAUTION .

Wiring diagram:

Air conditioning system Ref. to WIRING SYSTEM>AIR CONDITIONING SYSTEM>WIRING DIAGRAM .

Courtesy of SUBARU OF AMERICA, INC.

CHECK CONNECTOR .
1. Turn the ignition switch to OFF.
2. Check connecting condition of the A/C control panel and evaporator sensor connector.
Is the check result OK?

Yes: Go to 2.

No: Repair the connector.
CHECK DTC .
1. Turn the ignition switch to ON.
2. Read the DTC of [Air Conditioner] using the Subaru Select Monitor. Ref. to AIR CONDITIONER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B1435 displayed? (Current code)

Yes: Go to 3.

No: Even if DTC is displayed, the circuit has returned to a normal condition at this time.

Reproduce the failure, and then perform the diagnosis.

NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
CHECK EVAPORATOR SENSOR .
1. Turn the ignition switch to OFF.
2. Disconnect the connector from the evaporator sensor. Ref. to AIR CONDITIONER>EVAPORATOR SENSOR .
3. Turn the ignition switch to ON.
4. Read the DTC of [Air Conditioner] using the Subaru Select Monitor. Ref. to AIR CONDITIONER (DIAGNOSTICS)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC B1434 displayed? (Current code)

Yes: Replace the evaporator sensor. Ref. to AIR CONDITIONER>EVAPORATOR>REMOVAL .

No: Go to 4.
CHECK HARNESS (SHORTED BETWEEN LINES AND SHORTED TO GROUND) .
1. Turn the ignition switch to OFF.
2. Disconnect the connector from the A/C control panel. Ref. to AIR CONDITIONER>CONTROL PANEL>REMOVAL .
3. Using a tester, check the continuity between the terminals in the evaporator sensor connector and between the evaporator sensor connector and chassis ground.
  Connector & terminal
  
  (B110) No. 1 - (B110) No. 2:
  
  (B110) No. 1 - Chassis ground:
Is there continuity?

Yes: Repair or replace the short circuit of the harness.

No: Replace the A/C control panel. Ref. to AIR CONDITIONER>CONTROL PANEL>REMOVAL .