DTC B2276 ACCR Signal Circuit Malfunction: Wiring Diagram

WARNING: This page is about a different car, the 2006 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Wiring Diagram - ACCR Signal Circuit Malfunction

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK FOR DTCS
1. Delete the DTC (See DIAGNOSIS SYSTEM ).
  HINT:
  
  After all DTCs are cleared, check if the trouble occurs again 50 seconds after the engine switch is turned on (IG).
2. Check for DTCs again.
  OK: No DTC is output.
NG : Go to step 2

OK : CHECK INTERMITTENT PROBLEMS

INSPECT POWER SOURCE CONTROL ECU

Measure the voltage according to the value(s) in the table below.

Standard voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

Terminal No. (Symbol)	Condition	Specified condition
J55-31 (CTSW) - Body ground	Brake pedal depressed, Engine switch on (ST)	0.1 to 0.8 V (*1)
J55-31 (CTSW) - Body ground	Engine switch on (IG)	10 to 14 V

Fig 2: Inspecting Power Source Control ECU Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

*1: Voltage is output only when the engine is cranking.

NG : Go to step 4

OK : GO TO NEXT STEP

CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - ECM)

Disconnect the J55 ECU connector.
Disconnect the A5 ECM connector.

Measure the resistance of the wire harness side connectors.

Standard resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
J55-31 (CTSW) - A5-11 (ACCR)	Below 1 Ω
J55-31 (CTSW) or A5-11 (ACCR) - Body ground	10 kΩ or higher

Fig 3: Identifying Power Source Control J55 ECU Connector

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

OK : GO TO NEXT STEP

CHECK AND REPLACE POWER SOURCE CONTROL ECU
1. Temporarily replace the power source control ECU with a new or normally functioning one.
2. Delete the DTC (See DIAGNOSIS SYSTEM ).
3. Recheck for DTCs again.
  OK: No DTC is output.
NG : REPLACE ECM

OK : END (POWER SOURCE CONTROL ECU IS DEFECTIVE)