SYSTEM DESCRIPTION
The ECM sends the engine speed signal to the A/C amplifier via CAN communication.
The A/C amplifier reads the difference between compressor speed and engine speed. When the difference becomes too large, the A/C amplifier determines that the compressor is locked, and turns the magnetic clutch off.
DTC No. | DTC Detection Condition | Trouble Area |
---|---|---|
B1422/22 | Open or short in compressor lock sensor circuit |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
CHECK CAN COMMUNICATION SYSTEM
Use the intelligent tester to check if the CAN communication system is functioning normally.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
GO TO CAN COMMUNICATION SYSTEM Click here |
A |
INSPECT A/C COMPRESSOR (A/C LOCK SENSOR)
Disconnect the A/C compressor connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPLACE A/C COMPRESSOR (A/C LOCK SENSOR) Click here |
OK |
CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - A/C LOCK SENSOR)
Disconnect the A/C amplifier connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | ||||||||
---|---|---|---|---|---|---|---|---|
|
B |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here |
C |
REPLACE A/C AMPLIFIER Click here |
A |
REPAIR OR REPLACE HARNESS OR CONNECTOR