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:
Open in Pressure Sensor Circuit / Abnormal Refrigerant Pressure (B1423)
DESCRIPTION This DTC is stored if refrigerant pressure on the high pressure side is extremely low (196 kPaG (2.0 kgf/cm2, 28 psi) or less) or extremely high (2812 kPaG (28.7 kgf/cm2, 408 psi) or more)
Air Mix Damper Control Servo Motor Circuit (Passenger Side) (B1441)
DESCRIPTION for Dual Type The No. 1 air conditioning radiator damper servo sub-assembly (front passenger side air mix) sends pulse signals to inform the air conditioning amplifier assembly of the damp
Air Inlet Damper Control Servo Motor Circuit (B1442)
DESCRIPTION The No. 1 blower damper servo sub-assembly sends pulse signals to inform the air conditioning amplifier assembly of the damper position. The air conditioning amplifier assembly activates t
SEE MORE:
Cursor or Map Rotates when Vehicle Stopped
PROCEDURE
1. CHECK CONDITION
(a) Check with the customer if the vehicle has been turned by a turntable.
OK: Vehicle has not been turned by a turntable. HINT:
If the vehicle is turned on a turntable with the engine switch on (IG), the system may store the angular velocity. As
Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA (a) Whenever a DTC is detected, the windshield wiper motor motor assembly stores the current vehicle state as Freeze Frame Data.
CHECK FREEZE FRAME DATA (a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON. (c) Turn the Techstream on.
