Heating Air Conditioning. Dtc B1422/22 Compressor Lock Sensor Circuit

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200

Heating Air Conditioning. Land Cruiser. Urj200, 202 Grj200 Vdj200

SYSTEM DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT MAGNET CLUTCH ASSEMBLY

CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

INSPECT COOLER COMPRESSOR ASSEMBLY

CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - COOLER COMPRESSOR ASSEMBLY)

DTC B1422/22 Compressor Lock Sensor Circuit

SYSTEM 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. When the difference becomes too large, the air conditioning amplifier assembly determines that the compressor is locked, and turns the magnetic clutch off.

DTC Code	DTC Detection Condition	Trouble Area
B1422/22	An open or short in the compressor lock sensor circuit.	CAN communication line Cooler compressor assembly Harness or connector Air conditioning amplifier assembly

WIRING DIAGRAM

w/ Rear Heater:

Land Cruiser. Urj200, 202 Grj200 Vdj200.Heating Air Conditioning.Air Conditioning System (For Automatic Air Conditioning System).
Dtc
B1422/22 Compressor Lock Sensor Circuit

w/o Rear Heater:

INSPECTION PROCEDURE

NOTICE:

ECM malfunctions can affect the storage of this DTC. Therefore, check all ECM DTCs and confirm that the system is normal before performing the following inspection.

for 1GR-FE: Click here
for 1VD-FTV (w/ DPF): Click here
for 1VD-FTV (w/o DPF): Click here
for 1UR-FE: Click here
for 3UR-FE: Click here

The air conditioning system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click here ).

1.INSPECT MAGNET CLUTCH ASSEMBLY

Remove the magnet clutch assembly.
1. for 1GR-FE: Click here
2. for 1VD-FTV: Click here
3. for 1UR-FE: Click here
4. for 3UR-FE: Click here

Inspect the magnet clutch assembly.
1. for 1GR-FE: Click here
2. for 1VD-FTV: Click here
3. for 1UR-FE: Click here
4. for 3UR-FE: Click here
Result
Result
Proceed to
OK
A
NG (for 1GR-FE)
B
NG (for 1VD-FTV)
C
NG (for 1UR-FE)
D
NG (for 3UR-FE)
E

Result
Result	Proceed to
OK	A
NG (for 1GR-FE)	B
NG (for 1VD-FTV)	C
NG (for 1UR-FE)	D
NG (for 3UR-FE)	E

REPLACE MAGNET CLUTCH ASSEMBLY (Click here)

A

2.CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY

w/ Rear Heater:
1. Remove the air conditioning amplifier assembly with its connectors still connected (Click here).
  
  Text in Illustration
  *a
  Component with harness connected
  ((Air Conditioning Amplifier Assembly)
  *b
  Waveform
2. Measure the waveform of the connector.
  Measurement Condition
  Item
  Contents
  Terminal No. (Symbol)
  E35-30 (LOCK) - E35-32 (SG-2)
  Tool Setting
  200 mV/DIV., 10 ms/DIV.
  Condition
  Engine idling
  A/C switch on
  Blower switch LO

Text in Illustration
*a	Component with harness connected ((Air Conditioning Amplifier Assembly)	*b	Waveform

Measurement Condition
Item	Contents
Terminal No. (Symbol)	E35-30 (LOCK) - E35-32 (SG-2)
Tool Setting	200 mV/DIV., 10 ms/DIV.
Condition	Engine idling A/C switch on Blower switch LO

w/o Rear Heater:

Text in Illustration
*a
Component with harness connected
((Air Conditioning Amplifier Assembly)
*b
Waveform
1. Remove the air conditioning amplifier assembly with its connectors still connected (Click here).
2. Measure the waveform of the connector.
  Measurement Condition
  Item
  Contents
  Terminal No. (Symbol)
  E81-8 (LOCK) - E81-13 (SG-2)
  Tool Setting
  200 mV/DIV., 10 ms/DIV.
  Condition
  Engine running
  A/C switch on
  Blower switch LO

Text in Illustration
*a	Component with harness connected ((Air Conditioning Amplifier Assembly)	*b	Waveform

Measurement Condition
Item	Contents
Terminal No. (Symbol)	E81-8 (LOCK) - E81-13 (SG-2)
Tool Setting	200 mV/DIV., 10 ms/DIV.
Condition	Engine running A/C switch on Blower switch LO

Go to step 3

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)

3.INSPECT COOLER COMPRESSOR ASSEMBLY

Remove the cooler compressor assembly.
1. for 1GR-FE: Click here
2. for 1VD-FTV: Click here
3. for 1UR-FE: Click here
4. for 3UR-FE: Click here

Inspect the cooler compressor assembly.
1. for 1GR-FE: Click here
2. for 1VD-FTV: Click here
3. for 1UR-FE: Click here
4. for 3UR-FE: Click here
Result
Result
Proceed to
OK
A
NG (for 1GR-FE)
B
NG (for 1VD-FTV)
C
NG (for 1UR-FE)
D
NG (for 3UR-FE)
E

Result
Result	Proceed to
OK	A
NG (for 1GR-FE)	B
NG (for 1VD-FTV)	C
NG (for 1UR-FE)	D
NG (for 3UR-FE)	E

REPLACE COOLER COMPRESSOR ASSEMBLY (Click here)

A

4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER ASSEMBLY - COOLER COMPRESSOR ASSEMBLY)

w/ Rear Heater:

Disconnect the E35 air conditioning amplifier assembly connector.
Disconnect the C30 cooler compressor assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E35-30 (LOCK) - C30-1 (SSR+)	Always	Below 1 Ω
E35-32 (SG-2) - C30-2 (SSR-)	Always	Below 1 Ω
C30-1 (SSR+) - C30-2 (SSR-)	Always	10 kΩ or higher
E35-30 (LOCK) or C30-1 (SSR+) - Body ground	Always	10 kΩ or higher
E35-32 (SG-2) or C30-2 (SSR-) - Body ground	Always	10 kΩ or higher

w/o Rear Heater:

Disconnect the E81 air conditioning amplifier assembly connector.
Disconnect the C30 cooler compressor assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
E81-8 (LOCK) - C30-1 (SSR+)	Always	Below 1 Ω
E81-13 (SG-2) - C30-2 (SSR-)	Always	Below 1 Ω
C30-1 (SSR+) - C30-2 (SSR-)	Always	Below 1 Ω
E81-8 (LOCK) or C30-1 (SSR+) - Body ground	Always	10 kΩ or higher
E81-13 (SG-2) or C30-2 (SSR-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY (Click here)