B2274

2GR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: B2274: ACC Monitor Malfunction

DTC B2274 - ACC Monitor Malfunction

DESCRIPTION

This DTC is output when a malfunction is occurring in the ACCD output circuit, which is from the ACC relay actuation circuit inside the power source control ECU to the ACC relay.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK WIRE HARNESS (MAIN BODY ECU RH - POWER SOURCE CONTROL ECU AND BODY GROUND)





(a) Disconnect the DA and DD ECU connectors.
(b) Disconnect the K73 ECU connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK MAIN BODY ECU RH (ACC RELAY)





(a) Disconnect the DD and DM ECU connectors.
(b) Measure the resistance of the ECU connectors.
Standard resistance:






NG -- REPLACE MAIN BODY ECU RH
OK -- Continue to next step.
3. CHECK POWER SOURCE CONTROL ECU (ACCD VOLTAGE)





(a) Measure the output voltage of the power source control ECU.
Standard voltage:






NG -- REPLACE POWER SOURCE CONTROL ECU
OK -- END