DTC B13AA-87: Lost Communication with Front Control Rear Air Outlet Damper Control Servo Motor LIN Missing Message [08/2023 - ]: Description
WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.
The air conditioning harness assembly connects the air conditioning amplifier assembly and No. 2 air conditioning radiator damper servo sub-assembly.
The No. 2 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 | MIL | Memory | DTC Output from | Priority | Note |
|---|---|---|---|---|---|---|---|---|
| B13AA-87 | Lost Communication with Front Control Rear Air Outlet Damper Control Servo Motor LIN Missing Message | Diagnosis Condition:
Malfunction:
Detection Time:
|
No. 2 air conditioning radiator damper servo sub-assembly | Does not come on | Memorized | Air Conditioner | B | - |
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. 2 air conditioning radiator damper servo sub-assembly | ◦ | - |
| Open in communication line between air conditioning amplifier assembly and No. 2 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.