Air Conditioning Compressor Magnetic Clutch 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. Using a voltmeter, check the signal reading of the semiconductor pwr integration ECU.

   Refer to ON-VEHICLE INSPECTION [12/2013 - 11/2016]

   OK

   A normal signal reading is output.

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

CHECK SEMICONDUCTOR PWR INTEGRATION ECU (RESULT OF SIGNAL READING). Refer to  ON-VEHICLE INSPECTION [12/2013 - 11/2016] 

Result:  1

OK 

See step  3

1. Remove the semiconductor pwr integration ECU from the No. 1 engine room relay block and No. 1 junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   1A-1 (ALT) - Body ground	Always	11 to 14 V
   1B-1 (BATT) - Body ground	Always	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1D-14 (GND1) - Body ground	Always	Below 1 Ω
   1G-5 (GND2) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  4

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1D-12 (ACOP) - C12-3 (MG+)	Always	Below 1 Ω
   1D-12 (ACOP) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

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
   1D-4 (ACOS) - F80-20 (MGC)	Always	Below 1 Ω
   1D-4 (ACOS) - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  6

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

   Standard Resistance

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Cooler Compressor Assembly)

3. 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:  1

OK 

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

Result:  2

NG 

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