Toyota CH-R Service Manual: Compressor Solenoid Circuit (B1451)

Toyota CH-R Service Manual / Heating / Air Conditioning / Air Conditioning System(for Automatic Air Conditioning System With Top-mounted Air Conditioner Pressure Sensor) / Compressor Solenoid Circuit (B1451)

DESCRIPTION

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

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory
B1451	Compressor Solenoid Circuit	Any of the following conditions is met: Open in compressor solenoid circuit Short in compressor solenoid circuit	Compressor with pulley assembly (compressor solenoid) Harness or connector between air conditioning amplifier assembly and compressor with pulley assembly (compressor solenoid) Air conditioning amplifier assembly	-

DTC Detection Conditions

		Vehicle Condition
		Pattern 1	Pattern 2
Diagnosis Condition	Ignition switch ON	○	○
Malfunction Status	Open in compressor solenoid circuit	○	-
Malfunction Status	Short in compressor solenoid circuit	-	○
Detection Time		30 seconds or more	30 seconds or more
Number of Trips		1 trip	1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.	INSPECT COMPRESSOR WITH PULLEY ASSEMBLY (COMPRESSOR SOLENOID)

(a) Remove the compressor with pulley assembly (compressor solenoid).

Click here

(b) Inspect the compressor with pulley assembly (compressor solenoid).

Click here

REPLACE COMPRESSOR WITH PULLEY ASSEMBLY (COMPRESSOR SOLENOID)

2.	CHECK HARNESS AND CONNECTOR (COMPRESSOR WITH PULLEY ASSEMBLY (COMPRESSOR SOLENOID) - POWER SOURCE)

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
C33-2 (SOL+) - Body ground	Ignition switch ON	11 to 14 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

(a) Disconnect the F72 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
C33-1 (SOL-) - F72-15 (SOL-)	Always	Below 1 Ω
C33-1 (SOL-) or F72-15 (SOL-) - Body ground	Always	10 kΩ or higher

Result	Proceed to
NG	A
OK (When troubleshooting according to the Problem Symptoms Table)	B
OK (When troubleshooting according to the DTC)	C

REPAIR OR REPLACE HARNESS OR CONNECTOR

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

4.	CHECK FOR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Air Conditioner > Clear DTCs

(b) Check for DTCs.

Click here

Body Electrical > Air Conditioner > Trouble Codes

Result	Proceed to
DTCs are not output	A
DTCs are output	B

USE SIMULATION METHOD TO CHECK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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