DTC B1422: Compressor Lock Sensor Circuit [11/2016 - ]: Procedure

1. Using the Techstream, check if the CAN communication system is functioning normally.

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ]

   Result

   Result	Proceed to
   CAN communication system DTCs are not output	A
   CAN communication system DTCs are output	B

Result:  2

B 

GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ] 

Result:  1

A 

See step  2

1. Disconnect the magnetic clutch assembly connector.
2. Install SST to the connector on the magnetic clutch relay side.
   • SST: 09843-18040 
3. Connect the Techstream to the DLC3.
4. Start the engine.
5. Turn the Techstream on.
6. Enter the following menus: Body Electrical / Air Conditioner / Active Test.

   Body Electrical > Air Conditioner > Active Test 

   Tester Display	Measurement Item	Control Range	Diagnostic Note
   Magnetic Clutch Relay	Air conditioning system operation	OFF or ON	-

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Magnetic Clutch Assembly)

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   1 - Body ground	Engine is running Active Test above is being performed	11 to 14 V

   HINT: 

   When performing the Active Test, voltage between 11 and 14 V is output for approximately 3 seconds.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

GO TO AIR CONDITIONING COMPRESSOR MAGNETIC CLUTCH CIRCUIT. Refer to  Air Conditioning Compressor Magnetic Clutch Circuit [11/2016 - ]  

Result:  1

OK 

See step  3

1. Connect the magnetic clutch assembly connector.
2. Disconnect the C12 cooler compressor assembly connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Magnetic Clutch Assembly)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   3 (MG+) - Body ground	20°C (68°F)	3.8 to 4.2 Ω

4. Connect a positive (+) lead from the battery to terminal 3 (MG+) and check that the following occurs: 1) the magnetic clutch assembly operating sound can be heard, and 2) the magnetic clutch hub and rotor lock.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE MAGNETIC CLUTCH ASSEMBLY. Refer to  REMOVAL [11/2016 - ] 

Result:  1

OK 

See step  4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (SSR+) - 2 (SSR-)	20°C (68°F)	160 to 320 Ω

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE COOLER COMPRESSOR ASSEMBLY. Refer to  REMOVAL [11/2016 - ] 

Result:  1

OK 

See step  5

1. Disconnect the F80 air conditioning amplifier assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   C12-1 (SSR+) - F80-8 (LOCK)	Always	Below 1 Ω
   C12-2 (SSR-) - F80-13 (SG-2)	Always	Below 1 Ω
   C12-1 (SSR+) or F80-8 (LOCK) - Body ground	Always	10 kΩ or higher
   C12-2 (SSR-) or F80-13 (SG-2) - Body ground	Always	10 kΩ or higher

   Result

   Result	Proceed to
   OK (When troubleshooting according to Problem Symptoms Table)	A
   OK (When troubleshooting according to the DTC)	B
   NG	C

Result:  1

A 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [11/2016 - ] 

Result:  2

B 

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to  REMOVAL [12/2013 - ] 

Result:  3

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR