Toyota Camry (XV70): Compressor Solenoid Circuit (B1451)

Toyota Camry Repair Manual XV70 (2018-2024) / Vehicle Interior / Heating / Air Conditioning / Air Conditioning System (for Manual Air Conditioning System) / Compressor Solenoid Circuit (B1451)

DESCRIPTION

In this circuit, the compressor assembly with pulley (compressor solenoid) receives refrigerant compression demand signals from the air conditioning amplifier assembly.

Based on this signal, the compressor assembly with pulley (compressor solenoid) changes the amount of compressor output.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory
B1451	Compressor Solenoid Circuit	Open or short in compressor solenoid circuit	Compressor assembly with pulley (compressor solenoid) Harness or connector Air conditioning amplifier assembly	-

WIRING DIAGRAM

PROCEDURE

1.	INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

*a	Front view of wire harness connector (to Compressor Assembly with Pulley (Compressor Solenoid))

(a) Disconnect the C98 compressor assembly with pulley (compressor solenoid) connector.

(b) Connect an oscilloscope to terminal C98-2 (SOL+) and body ground and check the waveform.

OK:

Waveform is similar to that shown in the illustration.

Item	Content
Tool Setting	5 V/DIV., 500 ?s./DIV.
Condition	Ignition switch ON Blower switch: LO A/C switch: On

REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID)

2.	CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the K54 air conditioning amplifier assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
C98-2 (SOL+) - K54-3 (SOL+)	Always	Below 1 ?
C98-2 (SOL+) or K54-3 (SOL+) - Other terminals and body ground	Always	10 k? or higher

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

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Internal Control Module EEPROM Data Memory Failure (P062F44)

DESCRIPTION The ECM monitors its internal operation and stores this DTC when it detects an internal malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note P062F44 Internal Control Module EEPROM Data Memory Failure An ECM in

Toyota Camry (XV70): Compressor Solenoid Circuit (B1451)

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