B2274

2GR-FE STARTING: SMART KEY SYSTEM: B2274: ACC Monitor Malfunction
B2274 - ACC Monitor Malfunction

DESCRIPTION

This DTC is output when the ACC output circuit from the inside the power source control ECU to the ACC relay is malfunctioning.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE USING TECHSTREAM

(a) Connect Techstream to the DLC3.

(b) Turn the engine switch on (IG) and press Techstream main switch on.

(c) Read the Data List according to the displays on the tester.

Power Source Control:





OK:

"ON" (engine switch on (ACC)) appears on the screen.

Result:





C -- INSPECT RELAY (Marking: ACC)

B -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

A -- REPLACE POWER SOURCE CONTROL ECU

2. INSPECT RELAY (Marking: ACC)

(a) Remove the ACC relay for the instrument panel J/B.





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

Resistance:





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

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

(a) Disconnect the D44 ECU connector.





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





Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE POWER SOURCE CONTROL ECU