Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM100000001R419
Model Year Start: 2021 Model: Camry HV Prod Date Range: [10/2020 -           ]
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: Operation not Accepted Even If Air Conditioning Switch is Operated; 2021 - 2024 MY Camry HV [10/2020 -        ]

Operation not Accepted Even If Air Conditioning Switch is Operated

DESCRIPTION

If the air conditioning system cannot be operated using the air conditioning control assembly, the following factors may be the cause.

Symptom

Factor

Air conditioning system cannot be operated using air conditioning control assembly

  • (With the exception of the switch indicators, no inputs are reflected when other switches operated)
  • LIN communication malfunction between air conditioning amplifier assembly and air conditioning control assembly
  • Short to +B or ground in air conditioning amplifier assembly circuit
  • Air conditioning amplifier assembly malfunction
  • Air conditioning control assembly malfunction
  • Harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Air Conditioner > Trouble Codes

OK:

DTC B14B2 is not output.

NG

GO TO DTC B14B2

OK

2.

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - POWER SOURCE AND BODY GROUND)

*a

Front view of wire harness connector

(to 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

K54-4 (GND) - Body ground

Always

Below 1 Ω

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

K54-1 (B) - Body ground

Always

11 to 14 V

K54-2 (IG+) - Body ground

Power switch on (IG)

11 to 14 V

Power switch off

Below 1 V

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR