DTC B2274: ACC Monitor Malfunction: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Body Electrical / Body / Data List.
5. Read the Data List according to the display 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
   
   

   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 → See step   3 

OK: Go to next step 

1. Clear the DTC. Refer to DTC CHECK / CLEAR .
2. Turn the engine switch on (IG).
3. After 10 seconds have elapsed, check for DTCs.
   RESULT
   
   

   Result	Proceed to
   DTC B2274 is output.	A
   DTC B2274 is not output.	B

B → See step   5 

A → See step   6 

1. Disconnect the RA and RD connectors from the main body ECU RH (cowl side junction block RH).
   Fig 1: RD And RA Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   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

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Cowl Side Junction Block RH)

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

OK: Go to next step 

1. Disconnect the J55 connector from the power source control ECU.
   Fig 2: J55, RD And RA Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE
   
   

   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

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Power Source Control ECU)
   *2	Front view of wire harness connector (to Cowl Side Junction Block RH)

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

OK → See step   7