B2276

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

DTC B2276 - ACCR Signal Circuit Malfunction

DESCRIPTION

The main body ECU (instrument panel junction block) will set this DTC if the ACCR signal sent from the ECM is ON for 40 seconds or more.
HINT: When the main body ECU (instrument panel junction block) 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 (instrument panel junction block) 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 HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)
OK -- USE SYMPTOM METHOD TO CHECK
2. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - ECM)
(a) Disconnect the D7 ECU connector.




(b) Disconnect the D35 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 D7 and D35 connectors.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:





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

NG -- REPLACE ECM
OK -- Continue to next step.
4. CHECK MAIN BODY ECU OPERATION
(a) 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.
(b) 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 -- REPLACE ECM
OK -- END (MAIN BODY ECU DEFECTIVE)