Last Modified: 07-31-2024 |
6.11:8.1.0 |
Doc ID: RM1000000025R2B |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [09/2022 - 11/2022] |
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (except TMC Made, and Gasoline Model, with Automatic Air Conditioning System): B1451; Compressor Solenoid Circuit; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022] |
DTC
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B1451
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Compressor Solenoid Circuit
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DESCRIPTION
In this circuit, the compressor assembly with pulley receives refrigerant compression demand signals from the air conditioning amplifier assembly.
Based on this signal, the compressor assembly with pulley changes the amount of compressor output.
DTC No.
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Detection Item
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DTC Detection Condition
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Trouble Area
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Memory
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B1451
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Compressor Solenoid Circuit
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Open or short in compressor solenoid circuit
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-
Compressor assembly with pulley
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Harness or connector
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Air conditioning amplifier assembly
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-
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WIRING DIAGRAM
PROCEDURE
1.
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CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY - AIR CONDITIONING AMPLIFIER ASSEMBLY)
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(a) Disconnect the I49 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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C85-2 (SOL+) - I49-18 (SOL+)
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Always
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Below 1 Ω
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C85-2 (SOL+) or I49-18 (SOL+) - Other terminals and body ground
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Always
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10 kΩ or higher
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NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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OK
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|
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2.
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INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY
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*a
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Front view of wire harness connector
(to Compressor Assembly with Pulley)
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(a) Disconnect the C85 compressor assembly with pulley connector.
(b) Check the waveform.
Item
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Content
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Terminal No.
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C85-2 (SOL+) - Body ground
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Tool Setting
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5 V/DIV., 500 μs./DIV.
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Condition
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-
Engine running
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Blower switch: LO
-
A/C switch: On
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OK:
Waveform is similar to that shown in the illustration.
OK |
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REPLACE COMPRESSOR ASSEMBLY WITH PULLEY
for M20A-FKS: Click here
for 2ZR-FAE: Click here
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