DTC B1422: Compressor Lock Sensor Circuit [12/2013 - 11/2016]: Procedure

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

   Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2013 - 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 [12/2013 - 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 [12/2013 - 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. When connector terminal 3 (MG+) is connected to a positive (+) battery terminal, check that the following occurs: 1) the magnetic clutch operating sound can be heard, and 2) the magnetic clutch hub and rotor lock.

   OK

   1) The magnetic clutch assembly operating sound can be heard, and 2) the magnet clutch hub and rotor lock.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE MAGNETIC CLUTCH ASSEMBLY. Refer to  REMOVAL [12/2013 - 11/2016] 

Result:  1

OK 

See step  4

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Cooler Compressor Assembly)

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPLACE COOLER COMPRESSOR ASSEMBLY. Refer to  REMOVAL [12/2013 - 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
   F80-8 (LOCK) - Body ground	Always	10 kΩ or higher
   F80-13 (SG-2) - Body ground	Always	10 kΩ or higher

   Result

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

Result:  1

A 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  2

B 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2013 - 11/2016] 

Result:  3

C 

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