DTC Check (Sensor Check)

WARNING: This page is about a different car, the 2001 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

After indicator check is completed, system enters DTC check mode automatically. Stored diagnostic trouble codes will appear as blinks of A/C indicator. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION table. Turn blower switch from AUTO position to exit self-diagnostics.

DIAGNOSTIC TROUBLE CODE IDENTIFICATION

DTC Number

Condition/Affected Circuit

11
⁽¹⁾

Room Temperature Sensor Circuit

12
⁽²⁾

Ambient Temperature Sensor Circuit

Evaporator Temperature Sensor Circuit

Engine Coolant Temperature Sensor Circuit

21
⁽³⁾

Solar Sensor Circuit

22
⁽⁴⁾

Compressor Lock Sensor Circuit

Pressure Switch Circuit

31 & 41

Air Mix Damper Position Sensor Circuit

32 & 42

Air Inlet Damper Position Sensor Circuit

33 & 43

Air Outlet Damper Position Sensor Circuit

⁽¹⁾	If in-vehicle temperature is -4°F (-20°C) or less, Code 11 may set even though system is normal.

⁽²⁾	If ambient air temperature is -50°F (-58°C) or less, DTC 12 may set even though system is normal.

⁽³⁾	If testing is done in a dark area, DTC 21 may set even though system is normal. Shine a light at solar sensor and recheck codes.

⁽⁴⁾	Compressor lock is indicated only for a current malfunction.