Subaru Crosstrek Service Manual: Dtc b1433 ambient temperature sensor circuit short-circuit (air-conditioner)

DTC detecting condition:

Ambient sensor circuit is shorted.

Trouble symptom:

Ambient temperature is falsely recognized, and the compartment temperature is adjusted.

Wiring diagram:

Air conditioning system Air Conditioning System > WIRING DIAGRAM">

1.CHECK CONNECTOR.

1) Check the connecting conditions of combination meter connector and ambient sensor connector.

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

Is B1433 displayed?

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1433 AMBIENT TEMPERATURE SENSOR CIRCUIT SHORT-CIRCUIT (AIR-CONDITIONER)">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 AMBIENT SENSOR.

1) Disconnect the ambient sensor. Ambient Sensor > REMOVAL">

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

Is B1432 displayed?

Replace the ambient sensor. Ambient Sensor > REMOVAL">

Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC B1433 AMBIENT TEMPERATURE SENSOR CIRCUIT SHORT-CIRCUIT (AIR-CONDITIONER)">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

(F78) No. 1 (+) — No. 2 (−):

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 B1433 AMBIENT TEMPERATURE SENSOR CIRCUIT SHORT-CIRCUIT (AIR-CONDITIONER)">Go to Step 4.

4.CHECK HARNESS (SHORTED BETWEEN LINES).

1) Disconnect the connector from the combination meter.

2) Using a tester, check continuity between terminals.

Connector & terminal

(F78) No. 1 — No. 2:

Is there continuity?

Repair or replace the short circuit of the harness.

Replace the combination meter. Combination Meter > REMOVAL">

Dtc b1432 ambient temperature sensor circuit open (air-conditioner)

Dtc b1434 evaporator temperature sensor circuit open

Other materials:

Removal
CONTINUOUSLY VARIABLE TRANSMISSION(TR580) > Secondary Speed SensorREMOVALCAUTION:• Be sure to prevent water or oil from contacting the connector terminal of secondary speed sensor. If adhesion occurs, replace with a new part.• When secondary speed sensor is removed, CVTF leaks. After ...

Checking the oil level
1. Park the vehicle on a level surface and turn the ignition switch to the "LOCK"/ "OFF" position. If you check the oil level just after turning the ignition switch to the "LOCK"/"OFF" position, wait a few minutes for the oil to drain back into the oil pan before checking the level. Oi ...

Procedure
DIFFERENTIALS > Rear Differential Inspection ModePROCEDURECAUTION:Do not turn the power of the Subaru Select Monitor OFF during work, and do not disconnect the data link connector.1. Shift the select lever to “P” range.2. Apply the parking brake.3. Lift up the vehicle.WARNING:Lift up ...