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

   Refer to ON-VEHICLE INSPECTION [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 [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
   1M-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) or C12-3 (MG+) - 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) or F80-20 (MGC) - 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. 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:  1

OK 

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

Result:  2

NG 

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