Inspection Procedure

1. Select the ACTIVE TEST, use the hand-held tester to generate a control command, and then check that the A/C control is turned on and off.
   FUSE - REFERENCE TABLE
   
   

   Item	Test Details	Diagnostic Note
   DEFOGGER RLY-R	Operate rear window defogger OFF/ON	-

1. OK: 
2. When OFF is selected on the hand-held tester, the rear defogger should turn off. 
3. When ON is selected on the hand-held tester, the rear defogger should become active. 

NG: Go to step 2 

OK: REPLACE AIR CONDITIONER CONTROL ASSY AND IF DEFOGGER STILL DOES NOT OPERATE, REPLACE MULTI-DISPLAY OR CLUSTER INTEGRATION PANEL 

1. Remove the DEFOG H-fuse from the FL block.
2. Remove the FR IG fuse from the engine room R/B.
3. Measure the resistance of the fuse.

1. Standard: Below 1 Ω 

NG: REPLACE FUSE 

OK: Go to next step 

1. Remove the DEFOG relay from the engine room R/B No. 2.
2. Measure the voltage of the wire harness side connector.

   Standard: 

   DEFOG RELAY - BATTERY - VOLTAGE TABLE
   
   

   Tester Connection	Condition	Specified Condition
   R/B DEFOG relay terminal 1 - Body ground	Ignition switch ON	10 to 14 V
   R/B DEFOG relay terminal 5 - Body ground	Always	10 to 14 V

   Fig 1: Checking Wire Harness (Defog Relay - Battery)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Remove the DEFOG relay from the engine room R/B No. 2.
2. Measure the resistance of the relay.

   Standard: 

   RELAY (Marking: DEFOG) - RESISTANCE TABLE
   
   

   Tester Connection	Specified Condition
   3-4	Below 1 Ω
   3-5	10 kΩ or higher
   3-5	Below 1 Ω (when battery voltage is applied to terminals 1 and 2)

   Fig 2: Inspecting Relay

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE RELAY 

OK: Go to next step 

1. Disconnect the R22 and R23 defogger connectors.
2. Disconnect the DEFOG relay from the engine room R/B No. 2.
3. Measure the resistance of the wire harness side connectors.

   Standard: 

   REAR WINDOW DEFOGGER - DEFOG RELAY AND BODY GROUND - RESISTANCE TABLE
   
   

   Tester Connection	Specified Condition
   R22-1 - R/B DEFOG relay terminal 3	Below 1 Ω
   R23-1 - Body ground	Below 1 Ω

   Fig 3: Checking Wire Harness (Rear Window Defogger - Defog Relay And Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. Remove the DEFOG relay from the engine room R/B No. 2.
2. Disconnect the A11 A/C control connector.
3. Measure the resistance of the wire harness side connector.

   Standard: 

   DEFOG RELAY - A/C CONTROL ASSY - RESISTANCE TABLE
   
   

   Tester Connection	Specified Connection
   A11-8 (RDFGR) - R/B DEFOG relay terminal 2	Below 1 Ω

   Fig 4: Checking Wire Harness (Defog Relay - A/C Control Assy)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

NG: REPLACE REAR WINDOW DEFOGGER 

OK: REPLACE AIR CONDITIONER CONTROL ASSY