Operation not Accepted Even If Air Conditioning Switch is Operated [11/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Toyota Corolla Cross, 2024 Toyota Corolla Cross, and 2023 Toyota Corolla Cross. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR DTC
- Check for DTCs.
Body Electrical > Air Conditioner > Trouble Codes
Result
Result Proceed to B14B2-87 is not output A B14B2-87 is output B
Result:
B
GO TO DTC B14B2-87. Refer to DTC B14B2-87: Lost Communication with Front Panel LIN Missing Message [11/2022 - ]
Result:
A
See step 2
- Check for DTCs.
- 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)- Disconnect the I49 air conditioning amplifier assembly connector.
- Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage
Tester Connection Switch Condition Specified Condition I49-5 (B) - Body ground Ignition switch off 11 to 14 V I49-6 (IG+) - Body ground Ignition switch ON 11 to 14 V Ignition switch off Below 1 V Standard Resistance
Tester Connection Condition Specified Condition I49-17 (GND) - Body ground Always Below 1 Ω Result
Proceed to OK NG
Result:
OK
REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to REMOVAL [11/2022 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR