Toyota RAV4 manuals

Toyota Sienna Service Manual: Compressor Lock Sensor Circuit

DTC B1422/22 Compressor Lock Sensor Circuit

SYSTEM DESCRIPTION

The ECM sends an engine speed signal to the A/C amplifier via CAN communication and BEAN 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 locks, and turns the magnetic clutch off.

WIRING DIAGRAM

Compressor Lock Sensor Circuit

INSPECTION PROCEDURE

1 CHECK CAN COMMUNICATION SYSTEM

(a) Use the intelligent tester to check if the CAN communication system is functioning normally.

Result

2 CHECK MULTIPLEX COMMUNICATION SYSTEM

(a) Use the intelligent tester to check if the multiplex communication system (BEAN) is functioning normally.

Result

3 INSPECT A/C AMPLIFIER

INSPECT A/C AMPLIFIER

(a) Remove the A/C amplifier with the connectors still connected.

INSPECT A/C AMPLIFIER

(b) Measure the waveform of the connector.

Standard

Result

4 INSPECT COMPRESSOR AND MAGNETIC CLUTCH (A/C LOCK SENSOR)

INSPECT COMPRESSOR AND MAGNETIC CLUTCH (A/C LOCK SENSOR)

(a) Disconnect the connector from the A/C compressor.

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance

5 CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - A/C LOCK SENSOR)

CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - A/C LOCK SENSOR)

(a) Disconnect the connector from the A/C amplifier.

CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - A/C LOCK SENSOR)

(b) Measure the resistance according to the value(s) in the table below.

Standard resistance

REPLACE A/C AMPLIFIER

Solar Sensor Circuit (Passenger Side)
DTC B1421/21 Solar Sensor Circuit (Passenger Side) DESCRIPTION The solar sensor, which is installed on the upper side of the instrument panel, detects sunlight and controls the air conditioni ...

Pressure Sensor Circuit
DTC B1423/23 Pressure Sensor Circuit DESCRIPTION This DTC is output when refrigerant pressure on the high pressure side is extremely low (0.19 MPa (2.0 kgf/cm2, 28 psi) or less) or extremely high ...

Other materials:

DSP Error
DTC 44-78 DSP Error DESCRIPTION DTC No. DTC Detection Condition Trouble Area 44-78 An error occurs during the decode process (MP3 / WMA). - INSPECTION PROCEDURE HINT: After the inspection is completed, clear the DTCs. NOTICE:  Th ...

Stereo component speaker
COMPONENTS ON-VEHICLE INSPECTION 1. INSPECT STEREO COMPONENT SPEAKER HINT: Remove interior parts so that the stereo component speaker can be seen.  Check the speaker installation. OK: The speaker is securely installed. If the result is not as specified, reinstall the stereo ...

Map Disc cannot be Inserted
INSPECTION PROCEDURE 1 CHECK RADIO AND NAVIGATION ASSEMBLY Check if a disc is inserted into the MAP disc slot.  Check if "DISC IN" is displayed. OK: "DISC IN" is displayed 2 CHECK MAP DISC Check that the map disc is not deformed or cracked. OK: ...

В© 2011-2019 Copyright www.tsienna.net