Back-up Power Source Circuit [02/2014 - ]: Procedure

1. Disconnect the F80 and F81 air conditioning amplifier assembly connectors.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F80-21 (B) - Body ground	Power switch off	11 to 14 V
   F81-28 (+B2) - Body ground	Power switch off	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  1

OK 

See step  2

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F80-14 (GND) - Body ground	Always	Below 1 Ω
   F81-24 (GND2) - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result:  1

OK 

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [02/2014 - 11/2016]  Refer to  PROBLEM SYMPTOMS TABLE [11/2016 - ] 

Result:  2

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR