Inspection Procedure

HINT: 

Start the inspection from step  1 in the case of using the hand-held tester, and start from step  2 in the case of not using the hand-held tester.

1. READ VALUE OF HAND-HELD TESTER 
   1. Connect the hand-held tester to DLC3.
   2. Turn the ignition switch ON and push the hand-held tester, main switch ON.
   3. Select the items below in the DATA LIST, and read the displays on the hand-held tester,

   BODY NO.1: 

   DIAGNOSIS PROCEDURE (BODY NO. 1)
   
   

   Item	Measurement Item/ Display (Range)	Normal Condition	Diagnostic Note
   ACC SW	ACC SW signal/ON or OFF	ON: Ignition key is in ACC, ON or START position OFF: Ignition key is in OFF position	-
   IG SW	IG SW signal/ ON or OFF	ON: Ignition key is in ON or START position OFF: Ignition key is in OFF or ACC position	-

   1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
   2. NG: GO TO NEXT STEP 
2. INSPECT FUSE 
   1. Inspect the ECU ACC fuse, ECU-IG fuse and AM1 fuse in instrument panel junction block assy.
   1. NG: REPLACE FUSE 
   2. OK: GO TO NEXT STEP 
3. INSPECT RELAY 
   1. Inspect ACC relay continuity.

      Standard: 

      ACC RELAY
      
      

      Condition	Tester connection	Specified condition
      Always	1-2	Continuity
      Always	3-5	No continuity
      Apply B+ between the terminal 1 and 2	3-5	Continuity

      Fig 1: Inspecting ACC Relay Circuit

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Inspect IG1 relay continuity.

      Standard: 

      IG1 RELAY
      
      

      Condition	Tester connection	Specified condition
      Always	1-2	Continuity
      Always	3-5	No continuity
      Apply B+ between the terminal 1 and 2	3-5	Continuity

   Fig 2: Inspecting IG1 Relay Circuit

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPLACE RELAY 
   2. OK: GO TO NEXT STEP 
4. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY (ACC, IG) 
   1. Measure the voltage between the terminals as shown in Fig 3 .

      Standard: 

      Fig 3: Instrument Panel Junction Block Table (ACC, IG)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 4: Identifying Instrument Panel Junction Block Assy (ACC, IG)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE  
   2. NG: GO TO NEXT STEP 
5. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY (+B) 
   1. Measure voltage between the terminal 1A-1 of the instrument panel junction block assy and body ground.

      Standard: 

      INSTRUMENT PANEL JUNCTION BLOCK ASSY AND BODY GROUND (1 OF 2)
      
      

      Tester connection	Specified voltage
      1A-1 - Body ground	10 to 14 V

   Fig 5: Identifying Instrument Panel Junction Block Assy (+B)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: GO TO NEXT STEP 
6. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSY 
   1. Measure voltage between the terminal 1H-10 of the instrument panel junction block assy and body ground.

      Standard: 

      INSTRUMENT PANEL JUNCTION BLOCK ASSY AND BODY GROUND (2 OF 2)
      
      

      Tester connection	Condition	Specified voltage
      1H-10 - Body ground	Always	10 to 14 V

   Fig 6: Identifying Instrument Panel Junction Block Assy

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSY 
   2. OK: REPAIR OR REPLACE HARNESS OR CONNECTOR