Inspection Procedure

1. Connect the Techstream to the DLC3
2. Turn the engine switch on (IG) and turn the Techstream main switch on
3. Read the Data List according to the displays on the Techstream.

   HINT

   When using the Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1 5 second intervals or less until communication between the Techstream and vehicle starts.

   Body 

   ITEM RANGE REFERENCE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   ACC Relay Monitor	Status of ACC Relay Monitor / ON or OFF	ON Engine switch on (ACC) OFF Engine switch off	-

   OK: "ON" (Engine switch on (ACC)) appears on the screen. 

NG: Go to step  3

OK: Go to next Step 

1. Clear the DTC (See DIAGNOSIS SYSTEM  )
2. Turn the engine switch on (IG)
3. After 10 seconds have elapsed, check if the trouble occurs again

   OK: DTC B2274 is output. 

NG: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

OK: REPLACE POWER SOURCE CONTROL ECU 

1. Disconnect the RA and RD connectors from main body ECU RH (cowl side junction block RH).
2. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester Connection	Condition	Specified Condition
   RD-2 - RA-5 or RD-7	Always	68 to 250 Ω at 20°C (68°F)
   RD-2 - Body ground	Always	10 kΩ or higher

Fig 1: Identifying RA And RD Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH) 

OK: Go to next Step 

1. Disconnect the J55 connector from power source control ECU
2. Measure the resistance according to the value (s) in the table below

   Standard Resistance 

   RESISTANCE REFERENCE
   
   

   Tester connection	Condition	Specified Condition
   J55-11 (ACCD) - RD-2	Always	Below 1 Ω
   J55-11 (ACCD) or RD-2-Body ground	Always	10 kΩ or higher
   RA-5 - Body ground	Always	Below 1 Ω
   RD-7 - Body ground	Always	Below 1 Ω

Fig 2: Identifying J55 Connector Terminal
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CONTROL ECU - COWL SIDE JUNCTION BLOCK RH) 

OK: REPLACE POWER SOURCE CONTROL ECU