B2274

1NZ-FXE STARTING: SMART KEY SYSTEM: B2274: ACC Monitor Malfunction

DTC B2274 - ACC Monitor Malfunction

DESCRIPTION

This DTC is output when a malfunction is occurring in the ACC 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. READ VALUE USING DATA LIST (ACC RELAY)
(a) Connect Techstream to the DLC3.
(b) Turn the power switch ON (IG) and press Techstream main switch ON.
(c) Read the DATA LIST according to the displays on the tester.

Power source control ECU





OK:
ON (power switch ON (ACC)) appears on the screen.
OK -- REPLACE POWER SOURCE CONTROL ECU
NG -- Continue to next step.

2. INSPECT ACC RELAY




(a) Remove the ACC relay.
(b) Measure the resistance of the relay.
Standard resistance:






NG -- REPLACE ACC RELAY
OK -- Continue to next step.

3. CHECK WIRE HARNESS (ACC RELAY - POWER SOURCE CONTROL ECU AND BODY GROUND)




(a) Remove the ACC relay.
(b) Disconnect the P6 connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- REPLACE POWER SOURCE CONTROL ECU