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 Side-mounted Air Conditioner Pressure Sensor) / Compressor Solenoid Circuit (B1451)

DESCRIPTION

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

Based on this signal, the cooler compressor 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:

The air conditioning amplifier assembly stores this DTC if the malfunction has occurred for the period of time indicated in the brackets.

WIRING DIAGRAM

PROCEDURE

1.	INSPECT COMPRESSOR WITH PULLEY ASSEMBLY (COMPRESSOR SOLENOID)

(a) Disconnect the cooler compressor assembly (compressor solenoid) connector.

*a	Component without harness connected (Cooler Compressor Assembly (Compressor Solenoid))

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
1 (SOL-) - 2 (SOL+)	25°C (77°F)	10.1 to 11.1 Ω

REPLACE COMPRESSOR WITH PULLEY ASSEMBLY (COMPRESSOR SOLENOID)

2.	CHECK HARNESS AND CONNECTOR (COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) - BODY GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
C72-1 (SOL-) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

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

(a) Disconnect the F139 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
C72-2 (SOL+) - F139-3 (SOL+)	Always	Below 1 Ω
C72-2 (SOL+) or F139-3 (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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