DTC    B1451/51    Compressor Solenoid Circuit

for Preparation Click here


DESCRIPTION

In this circuit, the compressor receives a refrigerant compression demand signal from the air conditioning amplifier.
Based on this signal, the compressor changes the degree of refrigerant compression.

DTC No.
DTC Detection Condition
Trouble Area
B1451/51
Open or short in solenoid of externally changeable compressor circuit
  1. Air conditioning compressor
  2. Harness and connector between air conditioning amplifier and air conditioning compressor
  3. Air conditioning amplifier

WIRING DIAGRAM


E115016E15


INSPECTION PROCEDURE

1.READ VALUE USING INTELLIGENT TESTER (REGULATOR CONTROL CURRENT)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Air Conditioner / Data List.

  1. According to the display on the intelligent tester, read the Data List.

    Air Conditioner 
    Tester Display
    		Measurement Item/Display (Range)
    		Normal Condition
    		Diagnostic Note
    Regulator Control Current
    		Regulator control current /
    Min.: 0 A
    Max.: 0.997 A
    		Value changes between 0 A and 0.997 A in accordance with compressor and pulley operation
    		-

    OK:
    The display is as specified in the normal condition column.


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



B
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

C
REPLACE AIR CONDITIONING AMPLIFIER (Click here)
A


2.INSPECT AIR CONDITIONING COMPRESSOR
E105415E11

  1. Disconnect the B33 air conditioning compressor connector.

  1. 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

  1. Reconnect the air conditioning compressor connector.
    Result 
    Result
    		Proceed to
    OK
    		A
    NG (for 1KR-FE)
    		B
    NG (for 1ND-TV)
    		C
    Text in Illustration 
    *1
    		Component without harness connected
    (Air Conditioning Compressor)



B
REPLACE AIR CONDITIONING COMPRESSOR (Click here)

C
REPLACE AIR CONDITIONING COMPRESSOR (Click here)
A


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


    E176173E01

  1. Disconnect the B33 air conditioning compressor connector.

  1. Disconnect the D15 air conditioning amplifier connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B33-1 (SOL+) - D15-2 (SOL+)
    		Always
    		Below 1 Ω
    B33-1 (SOL+) - Body Ground
    		Always
    		10 kΩ or higher

  1. Reconnect the air conditioning compressor connector.

  1. Reconnect the air conditioning amplifier connector.
    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Air Conditioning Compressor)
    *2
    		Rear view of wire harness connector
    (to Air Conditioning Amplifier)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING COMPRESSOR - BODY GROUND)
E176185E02

  1. Disconnect the B33 air conditioning compressor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    D33-2 (SOL-) - Body Ground
    		Always
    		Below 1 Ω

  1. Reconnect the air conditioning compressor connector.
    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Air Conditioning Compressor)



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE AIR CONDITIONING AMPLIFIER (Click here)