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:

Speaker Circuit
DESCRIPTION  When the vehicle has a built-in type amplifier, a sound signal is sent from the radio receiver to the speakers via the "6 Speaker System" circuit.  When the vehicle has a separate type amplifier, a sound signal from the radio receiver is amplified by ...

Speaker Circuit
DESCRIPTION The sound signal that has been amplified by the stereo component amplifier is sent to the speakers from the stereo component amplifier through this circuit. If there is a short in this circuit, the stereo component amplifier detects it and stops output to the speakers. Thus s ...

Reassembly
1. INSTALL REAR DRIVE SHAFT OUTBOARD JOINT BOOT HINT: Before install the boot, wrap the spline of the outboard joint shaft with vinyl tape to prevent the boot from bearing damaged. (a) Install new outboard joint boot, 2 outboard joint boot clamps, 2 inboard joint boot clamps and inboard j ...

В© 2011-2023 Copyright www.tsienna.net