Toyota Corolla Cross: Lost Communication with Front Air Mix Damper Control Servo Motor LIN Missing Message (B140587)
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 |
|---|---|---|---|---|
| B140587 |
Lost Communication with Front 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
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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 |
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Removal
REMOVAL CAUTION / NOTICE / HINT COMPONENTS (REMOVAL)
Procedure Part Name Code
1 PRECAUTION
-
- -
2 WHEN REPLACING BATTERY ECU ASSEMBLY
-
- -
3 SERVICE PLUG GRIP
G3834 -
Basic Inspection
CAUTION / NOTICE / HINT When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out for all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following procedure, the location of the problem ca
