DTC B2276: ACCR Signal Circuit Malfunction: Procedure

1. Delete the DTCs, refer to DTC CHECK / CLEAR .

   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 B2276 is output.

NG → See step   2 

OK → See step   5 

1. Disconnect the D7 ECU connector.
2. Disconnect the D60 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   D7-3 (ACCR) - D60-13 (ACCR)	Always	Below 1 Ω
   D7-3 (ACCR) - Body ground	Always	10 kΩ or higher

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Reconnect the D7 and D60 connectors.
   Fig 1: Identifying D7 And D35 Connectors Terminals

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

   Standard voltage

   Tester Connection	Condition	Specified Condition
   D7-3 (ACCR) - Body ground	Brake pedal depressed, shift P position, engine switch is pushed once → on (IG)	0.1 to 0.8 V (*1) → output voltage at terminal AM1 or AM2 is -2 V or more.

   HINT: 

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

NG → See step   6 

OK: Go to next step 

1. After replacing the main body ECU (instrument panel junction block) with a normally functioning ECU, check that the engine starts. Make sure the brake pedal is depressed and the shift position is P at this time.
2. Check that the engine switch mode can be changed by pushing the engine switch.

   HINT: 

   Without depressing the brake pedal, push the engine switch repeatedly. Engine switch mode should turn from off to on (ACC) to on (IG) and back to off. With the brake pedal depressed, push the engine switch repeatedly. Engine switch mode should turn to ENGINE START from any status.

   OK

   Engine starts normally.

NG → See step   6 

OK → END (MAIN BODY ECU DEFECTIVE)