Toyota CH-R Service Manual: 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

-

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

NG

REPLACE COMPRESSOR WITH PULLEY ASSEMBLY (COMPRESSOR SOLENOID)

OK

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

A

REPAIR OR REPLACE HARNESS OR CONNECTOR

B

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

C

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

A

USE SIMULATION METHOD TO CHECK

B

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

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