Toyota Camry (XV70): Compressor Lock (B1422)
DESCRIPTION
The ECM sends the engine speed signal to the air conditioning amplifier assembly via CAN communication.
The air conditioning amplifier assembly reads the difference between compressor speed and engine speed. If the difference becomes excessively large, the air conditioning amplifier assembly determines that the compressor is locked, and turns the magnet clutch assembly off.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
Memory |
|---|---|---|---|---|
| B1422 |
Compressor Lock | Open or short in A/C lock sensor circuit |
| Memorized (3 seconds or more) |
HINT:
The air conditioning amplifier assembly stores the DTC if the malfunction has occurred for the period of time indicated in the brackets.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- The air conditioning system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the air conditioning system after confirming that the communication system is functioning properly.
Click here
.gif)
- ECM malfunctions can affect the storage of this DTC. Therefore, check all SFI system DTCs and confirm that the system is normal before performing the following inspection.
Click here
- Inspect the fuses for circuits related to this system before performing the following procedure.
- After replacing the air conditioning amplifier assembly, make sure to perform Initialization Servo Motor.
Click here
PROCEDURE
|
1. | INSPECT MAGNET CLUTCH ASSEMBLY |
(a) Remove the compressor assembly with magnetic clutch.
Click here
(b) Inspect the magnet clutch assembly.
Click here
| NG | .gif) | REPLACE MAGNET CLUTCH ASSEMBLY
|
|
.gif)
| 2. |
CHECK HARNESS AND CONNECTOR (MAGNET CLUTCH ASSEMBLY - AIR CONDITIONING AMPLIFIER ASSEMBLY) |
(a) Disconnect the K55 air conditioning amplifier assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
C63-1 (SSR+) - K55-21 (LOCK) |
Always | Below 1 ? |
|
C63-2 (SSR-) - K55-2 (SG-2) |
Always | Below 1 ? |
|
C63-1 (SSR+) or K55-21 (LOCK) - Other terminals and body ground |
Always | 10 k? or higher |
|
C63-2 (SSR-) or K55-2 (SG-2) - Other terminals and body ground |
Always | 10 k? or higher |
| OK | | REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR |
READ NEXT:
SEE MORE:
Inspection
INSPECTION PROCEDURE 1. INSPECT FLOW SHUTTING VALVE (NO. 1 WATER BY-PASS HOSE)
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection Condition
Specified Condition
1 - 2 20°C (68°F)
22 to 28 Ω
Removal
REMOVAL CAUTION / NOTICE / HINT
The necessary procedures (adjustment, calibration, initialization or registration) that must be performed after parts are removed and installed, or replaced during fuel main valve assembly removal/installation are shown below. Necessary Procedures After Parts Remove
