B2276

2AR-FE STARTING: SMART KEY SYSTEM: B2276: ACCR Signal Circuit Malfunction
B2276 - ACCR Signal Circuit Malfunction

DESCRIPTION

This DTC is output when the ACCR output circuit inside the main body ECU is open or shorted.

HINT
When the main body ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

After the main body ECU is replaced, perform the registration procedures for the engine immobiliser system Engine Immobiliser System (W/ Smart Key System).





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT

(a) Delete the DTCs Reading and Clearing Diagnostic Trouble Codes.

HINT
After all DTCs are cleared, check if the trouble occurs again 50 seconds after the engine switch is turned on (IG).

(b) Check for DTCs again.

OK:

No DTC B2276 is output.

NG -- CHECK WIRE HARNESS (MAIN BODY ECU - ECM)

OK -- CHECK INTERMITTENT PROBLEMS

2. CHECK WIRE HARNESS (MAIN BODY ECU - ECM)

(a) Disconnect the E6 ECU connector.





(b) Disconnect the C24 ECM connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT MAIN BODY ECU

(a) Reconnect the connectors.





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

Standard voltage:





HINT
Voltage is output only when the engine is cranking.

NG -- REPLACE MAIN BODY ECU
OK -- Continue to next step.

4. CHECK MAIN BODY ECU OPERATION

(a) After replacing the main body ECU with a normally functioning ECU, check that the engine starts.

OK:

Engine can start normally.

NG -- REPLACE ECM

OK -- END (MAIN BODY ECU DEFECTIVE)