DTC B1947, B2014

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DTC B1947, B2014

B3E070201038W08

DTC B1947, B2014 | Evaporator temperature sensor system
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POSSIBLE CAUSE | • Evaporator temperature sensor malfunction • Open or short circuit in wiring harness between climate control unit and evaporator temperature sensor

Diagnostic Procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Inspect the evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR INSPECTION.) • Is it normal? | Yes | Go to the next step.
No | Replace the evaporator temperature sensor. (See EVAPORATOR TEMPERATURE SENSOR REMOVAL/INSTALLATION.)

2

• Disconnect the climate control unit connector and the evaporator temperature sensor connector.
• Is there an open circuit in the wiring harness between the following terminals of the climate control unit and the evaporator temperature sensor?

  - T-B
  - U-A

Yes

Repair the wiring harness.

No | Go to the next step.
3 | • Is there a short circuit to ground in the wiring harness between climate control unit terminal T and evaporator temperature sensor terminal B? | Yes | Repair the wiring harness.
No | Connect the climate control unit connector, then go to the next step.

4

• Turn the ignition switch to the ON position.
• Inspect the voltage at the following climate control unit terminal (wiring harness-side).

  - Terminal T (evaporator temperature sensor input signal)

• Is the voltage normal? (Approx. 5 V)

Yes

The system is normal at present. (Clear the past malfunction from the memory.)

No | Inspect the connection of the climate control unit connector. (See CLIMATE CONTROL UNIT INSPECTION [FULL-AUTO AIR CONDITIONER].)