Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM1000000028C3S |
Model Year Start: 2023 |
Model: GR Corolla |
Prod Date Range: [11/2022 -
] |
Title: HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Gasoline Model with Automatic Air Conditioning System): B144B87; Lost Communication with Front Left Air Mix Damper Control Servo Motor LIN Missing Message; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [11/2022 - ] |
DTC
|
B144B87
|
Lost Communication with Front Left Air Mix Damper Control Servo Motor LIN Missing Message
|
DESCRIPTION
The air conditioning harness assembly connects the air conditioning amplifier assembly and No. 1 air conditioning radiator damper servo sub-assembly.
The No. 1 air conditioning radiator damper servo sub-assembly sends damper position information to the air conditioning amplifier assembly.
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
Memory
|
B144B87
|
Lost Communication with Front Left Air Mix Damper Control Servo Motor LIN Missing Message
|
Diagnosis Condition:
Malfunction:
-
Error or open in communication line between air conditioning amplifier assembly and No. 1 air conditioning radiator damper servo sub-assembly
Detection Time:
-
Continuously for 10 seconds or more
|
No. 1 air conditioning radiator damper servo sub-assembly
|
Memorized
|
DTC Detection Condition Combination Table
|
Vehicle Condition
|
Pattern 1
|
Pattern 2
|
Diagnosis Condition
|
Ignition switch ON
|
○
|
○
|
Malfunction
|
Error in communication line between air conditioning amplifier assembly and No. 1 air conditioning radiator damper servo sub-assembly
|
○
|
-
|
Open in communication line between air conditioning amplifier assembly and No. 1 air conditioning radiator damper servo sub-assembly
|
-
|
○
|
Detection Time
|
Continuously for 10 seconds or more
|
Continuously for 10 seconds or more
|
Trip Count
|
1 trip
|
1 trip
|
HINT:
If the conditions of either of these patterns are detected, a DTC will be stored.
WIRING DIAGRAM
for M20A-FKS:
for G16E-GTS:
PROCEDURE
(a) Check for DTCs.
Body Electrical > Air Conditioner > Trouble Codes
Result
|
Proceed to
|
DTC B142A88 is output
|
A
|
DTC B142A88 is not output
|
B
|
|