Toyota Corolla Cross: Lost Communication with Front Left Air Mix Damper Control Servo Motor LIN Missing Message (B144B87)
DESCRIPTION
The air conditioning harness assembly connects the air conditioning amplifier assembly and the No. 1 air conditioning radiator damper servo sub-assembly. The air conditioning amplifier assembly supplies power and sends operation instructions to No. 1 air conditioning radiator damper servo sub-assembly through the air conditioning harness assembly. The No. 1 air conditioning radiator damper servo sub-assembly sends pulse signals to inform the air conditioning amplifier assembly of the damper position.
|
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 Status:
Detection Time:
| No. 1 air conditioning radiator damper servo sub-assembly |
Memorized |
|
Vehicle Condition | |||
|---|---|---|---|
|
Pattern 1 | Pattern 2 | ||
|
Diagnosis Condition | Ignition switch ON |
○ | ○ |
|
Malfunction | Error communication with No. 1 air conditioning radiator damper servo sub-assembly |
○ | - |
|
Lost communication with 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
.png)
PROCEDURE
| 1. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Air Conditioner > Trouble Codes|
Result | Proceed to |
|---|---|
|
B142A88 is output | A |
|
B142A88 is not output |
B |
| A |
.gif) | GO TO DTC B142A88 |
| B |
| REPLACE NO. 1 AIR CONDITIONING RADIATOR DAMPER SERVO SUB-ASSEMBLY |
