Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001CO0F |
Model Year Start: 2019 |
Model: GR Corolla |
Prod Date Range: [06/2018 - 09/2022] |
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): Operation not Accepted Even If Air Conditioning Switch is Operated; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022] |
Operation not Accepted Even If Air Conditioning Switch is Operated
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DESCRIPTION
If the air conditioning system cannot be operated using the air conditioning control assembly, the following factors may be the cause.
Symptom
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Factor
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Air conditioning system cannot be operated using air conditioning control assembly
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(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
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Short to +B or ground in air conditioning amplifier assembly circuit
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Air conditioning amplifier assembly malfunction
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Air conditioning control assembly malfunction
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Harness or connector
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WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Air Conditioner / Trouble Codes.
(e) Check for DTCs.
Body Electrical > Air Conditioner > Trouble Codes
Result
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Proceed to
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B14B2 is not output
|
A
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B14B2 is output
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B
|
A
|
|
|
2.
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CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - POWER SOURCE AND BODY GROUND)
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*a
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Front view of wire harness connector
(to Air Conditioning Amplifier Assembly)
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(a) Disconnect the I49 air conditioning amplifier assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Condition
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Specified Condition
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I49-5 (B) - Body ground
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Always
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11 to 14 V
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I49-6 (IG+) - Body ground
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Engine switch on (IG)
|
11 to 14 V
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Engine switch off
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Below 1 V
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Standard Resistance:
Tester Connection
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Condition
|
Specified Condition
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I49-17 (GND) - Body ground
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Always
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Below 1 Ω
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NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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|