Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001522G
Model Year Start: 2018 Model: Camry Prod Date Range: [06/2017 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System): B1451; Compressor Solenoid Circuit; 2018 - 2024 MY Camry [06/2017 -        ]

DTC

B1451

Compressor Solenoid Circuit

DESCRIPTION

In this circuit, the compressor assembly with pulley (compressor solenoid)*1 or cooler compressor assembly (compressor solenoid)*2 receives refrigerant compression demand signals from the air conditioning amplifier assembly.

Based on this signal, the compressor assembly with pulley (compressor solenoid)*1 or cooler compressor assembly (compressor solenoid)*2 changes the amount of compressor output.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

B1451

Compressor Solenoid Circuit

Open or short in compressor solenoid circuit
  • Compressor assembly with pulley (compressor solenoid)*1
  • Cooler compressor assembly (compressor solenoid)*2
  • Harness or connector
  • Air conditioning amplifier assembly

-
  • *1: for A25A-FKS
  • *2: for 2GR-FKS

WIRING DIAGRAM

for A25A-FKS

for 2GR-FKS

PROCEDURE

1.

CONFIRM MODEL

Result

Proceed to

for A25A-FKS

A

for 2GR-FKS

B
B

GO TO STEP 4

A

2.

INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

*a

Front view of wire harness connector

(to Compressor Assembly with Pulley (Compressor Solenoid))

(a) Disconnect the C98 compressor assembly with pulley (compressor solenoid) connector.

(b) Connect an oscilloscope to terminal C98-2 (SOL+) and body ground and check the waveform.

OK:

Waveform is similar to that shown in the illustration.

Item

Content

Tool Setting

5 V/DIV., 500 μs./DIV.

Condition
  • Engine running
  • Blower switch: LO
  • A/C switch: On
OK

REPLACE COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) 2018 - 2020 MY Camry [06/2017 - 10/2020]; HEATING / AIR CONDITIONING: COMPRESSOR (for A25A-FKS): REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; HEATING / AIR CONDITIONING: COMPRESSOR (for A25A-FKS): REMOVAL

NG

3.

CHECK HARNESS AND CONNECTOR (COMPRESSOR ASSEMBLY WITH PULLEY (COMPRESSOR SOLENOID) - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the K54 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

C98-2 (SOL+) - K54-3 (SOL+)

Always

Below 1 Ω

C98-2 (SOL+) or K54-3 (SOL+) - Other terminals and body ground

Always

10 kΩ or higher
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

INSPECT AIR CONDITIONING AMPLIFIER ASSEMBLY

*a

Front view of wire harness connector

(to Cooler Compressor Assembly (Compressor Solenoid))

(a) Disconnect the C62 cooler compressor assembly (compressor solenoid) connector.

(b) Connect an oscilloscope to terminal C62-2 (SOL+) and body ground and check the waveform.

OK:

Waveform is similar to that shown in the illustration.

Item

Content

Tool Setting

5 V/DIV., 500 μs./DIV.

Condition
  • Engine running
  • Blower switch: LO
  • A/C switch: On
OK

REPLACE COOLER COMPRESSOR ASSEMBLY (COMPRESSOR SOLENOID) 2018 - 2020 MY Camry [06/2017 - 10/2020]; HEATING / AIR CONDITIONING: COMPRESSOR (for 2GR-FKS): REMOVAL 2021 - 2024 MY Camry [10/2020 -        ]; HEATING / AIR CONDITIONING: COMPRESSOR (for 2GR-FKS): REMOVAL

NG

5.

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

(a) Disconnect the K54 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

C62-2 (SOL+) - K54-3 (SOL+)

Always

Below 1 Ω

C62-2 (SOL+) or K54-3 (SOL+) - Other terminals and body ground

Always

10 kΩ or higher
OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR