DTC B2276: ACCR Signal Circuit Malfunction: Procedure

1. Clear the DTCs. Refer to DTC CHECK/CLEAR .
2. Check whether DTC B2276 recurs 50 seconds or more after the engine switch is turned on (IG).

   Result

   Display (DTC output)	Proceed to
   B2276	A
   No DTC output	B

B → END (SYSTEM IS OK) 

A: Go to next step 

1. Disconnect the L12 main body ECU connector.
   Fig 1: Identifying Connector Terminals Of L12 Main Body ECU

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

   Standard voltage

   Tester Connection	Condition	Specified Condition
   L12-3 (ACCR) - Body ground	When operating the engine switch to crank the engine.	11 to 14 V

OK → See step   4 

NG: Go to next step 

Fig 2: Checking Harness And Connector (Main Body ECU - ECM)

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1. Disconnect the L12 main body ECU connector.
2. Disconnect the A13 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L12-3 (ACCR) - A13-19 (ACCR)	Always	Below 1 Ω
   L12-3 (ACCR) or A13-19 (ACCR) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Temporarily replace the main body ECU with a new or normally functioning one.
2. Check whether DTC B2276 recurs by repeating the "CHECK WHETHER DTC OUTPUT RECURS" procedures above.

   OK

   No DTC is output.

NG → See step   5 

OK → END (MAIN BODY ECU IS FAULTY)