Dtc B1451 Compressor Solenoid Circuit

Vehicle Interior. Corolla. Zre142 Aze141
Heating Air Conditioning. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY - BODY GROUND)

INSPECT COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID)

CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY - A/C AMPLIFIER)

DTC B1451 Compressor Solenoid Circuit


DESCRIPTION

Through this circuit, the compressor assembly with pulley receives a refrigerant compression demand signal from the A/C amplifier.
Based on this signal, the compressor assembly with pulley changes the amount of compressor output.

DTC No.
DTC Detection Condition
Trouble Area
B1451
Open or short in compressor assembly with pulley (compressor solenoid) circuit
  1. Compressor assembly with pulley (compressor solenoid)
  2. Harness or connector between compressor assembly with pulley (compressor solenoid) and A/C amplifier or body ground
  3. A/C amplifier

WIRING DIAGRAM


Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1451 Compressor Solenoid Circuit


Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1451 Compressor Solenoid Circuit


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY - BODY GROUND)


    Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1451 Compressor Solenoid Circuit

  1. Disconnect the connector from the compressor assembly with pulley (compressor solenoid).

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B7-1 (SOL-) - Body ground*1
    		Always
    		Below 1 Ω
    B94-1 (SOL-) - Body ground*2
    		Always
    		Below 1 Ω
  1. *1: for TMC Made
  2. *2: except TMC Made
Text in Illustration
*A
for TMC Made
*B
except TMC Made
*a
Front view of wire harness connector
(to Compressor Assembly with Pulley (Compressor Solenoid))


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID)


    Corolla. Zre142 Aze141.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System). Dtc B1451 Compressor Solenoid Circuit

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B7-2 (SOL+) - B7-1 (SOL-)*1
    		20°C (68°F)
    		10 to 11 Ω
    B94-2 (SOL+) - B94-1 (SOL-)*2
    		20°C (68°F)
    		10 to 11 Ω
    1. *1: for TMC Made
    2. *2: except TMC Made
    Text in Illustration
    *A
    		for TMC Made
    *B
    		except TMC Made
    *a
    		Component without harness connected
    (Compressor Assembly with Pulley (Compressor Solenoid))
    Result:
    Result
    		Proceed to
    OK
    		A
    NG (for 2AZ-FE)
    		B
    NG (for 2ZR-FE)
    		C


B
REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (for 2AZ-FE) (COROLLA_ZRE142 RM000002XUM021X.html)

C
REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (for 2ZR-FE) (COROLLA_ZRE142 RM000002XUM022X.html)
A


3.CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY - A/C AMPLIFIER)

  1. Disconnect the connector from the A/C amplifier.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E111-13 (SOL+) - B7-2 (SOL+)*1
    		Always
    		Below 1 Ω
    E111-13 (SOL+) - B94-2 (SOL+)*2
    		Always
    		Below 1 Ω
    E62-7 (SOL+) - B94-2 (SOL+)*2
    		Always
    		Below 1 Ω
    B7-2 (SOL+) - Body ground*1
    		Always
    		10 kΩ or higher
    B94-2 (SOL+) - Body ground*2
    		Always
    		10 kΩ or higher
    1. *1: for TMC Made
    2. *2: except TMC Made
    Result:
    Result
    		Proceed to
    NG
    		A
    OK (When troubleshooting according to Problem Symptoms Table)
    		B
    OK (When troubleshooting according to the DTC)
    		C


B
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (COROLLA_ZRE142 RM000001M2W05PX.html)

C
REPLACE AIR CONDITIONING AMPLIFIER (COROLLA_ZRE142 RM000002XMC01VX.html)
A

REPAIR OR REPLACE HARNESS OR CONNECTOR