DTC B1422/22 Compressor Lock Sensor Circuit: Description

The ECM sends the engine speed signal to the TACO terminal of the A/C amplifier. The A/C amplifier reads the difference between compressor speed and engine speed. When the difference becomes too big, the A/C amplifier determines that the compressor locks, and turns the magnetic clutch off.

DTC CHART

DTC No.	DTC Detection Condition	Trouble Area
B1422/22	Compressor lock sensor circuit (Open or short)	A/C lock sensor (w/ magnet clutch compressor assembly) Compressor drive belt Harness and connector between A/C amplifier and ECM Harness and connector between A/C lock sensor (with magnet clutch compressor assembly) and A/C amplifier ECM A/C amplifier