DTC B1476/76: A/C Inverter Load System Malfunction: Procedure

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

   Result

   Result	Proceed to
   CAN DTC is not output	A
   CAN DTC is output (w/ Smart Key System)	B
   CAN DTC is output (w/o Smart Key System)	C

B → See step   4 

C → See step   8 

A: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON and turn the Techstream main switch on.
3. Select the item below in the Active Test and then check that the fan operates.
   ACTIVE TEST / AIR CONDITIONER:
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Electrical Fan	Electrical fan	OFF, ON	-

   OK

   Electrical fan operates smoothly.

NG → See step   5 

OK: Go to next step 

1. Install a manifold gauge set. Refer to ON-VEHICLE INSPECTION .
2. Read the manifold gauge pressure when the following conditions are established.
   Fig 1: Checking A/C Refrigeration Pressure

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Prepare the vehicle according to the chart below.

      Item	Condition
      Vehicle Doors	Fully open
      Temperature Setting	MAX COLD
      Blower Speed	HI
      A/C Switch	ON
      R/F Switch	RECIRCULATION
      Interior Temperature	30 to 35°C (86 to 95°F)

      Standard pressure

      Low pressure side 

      0.15 to 0.25 MPa (1.5 to 2.5 kgf/cm² , 21.3 to 35.6 psi)

      High pressure side 

      1.37 to 1.57 MPa (14 to 16 kgf/cm² , 199 to 228 psi)

NG → See step   6 

OK → See step   7