Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2008 Toyota Yaris. However, it is still accessible from the selected car via links, so may be relevant.

If a trouble code is displayed during the DTC check, inspect the suspected areas listed for that code. .
Inspect the fuse and relay before investigating the suspected areas shown in the table below.

HINT:

When the air conditioning system functions properly, DTC B1400/00 is output.

Air conditioning system

DIAGNOSTIC TROUBLE CODE CHART

DTC Code	Detection Item	Trouble Area
B1412/12	Ambient Temperature Sensor Circuit	Ambient temperature sensor Harness and connector between ambient temperature sensor and air conditioning amplifier Air conditioning amplifier
B1413/13	Evaporator Temperature Sensor Circuit	No. 1 cooler thermistor (evaporator temperature sensor) Harness and connector between No. 1 cooler thermistor (evaporator temperature sensor) and air conditioning amplifier Air conditioning amplifier
B1423/23	Pressure Sensor Circuit	Air conditioning pressure sensor Harness and connector between air conditioning pressure sensor and air conditioning amplifier Air conditioning amplifier
B1451/51	Compressor Solenoid Circuit	Compressor and pulley Harness and connector between air conditioning amplifier and compressor and pulley Air conditioning amplifier
B1499/99	Multiplex Communication Circuit	Air conditioning amplifier power source circuit Air conditioning amplifier ECM Combination meter assembly CAN communication line