B2274

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

DTC B2274 - ACC Monitor Malfunction

DESCRIPTION

This DTC is output when there is a problem in the ACCD output circuit, which is from the inside of the main body ECU (instrument panel junction block) to the ACC relay.
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. READ VALUE USING TECHSTREAM
(a) Connect Techstream to the DLC3.
(b) Turn the engine switch on (IG) and turn Techstream main switch on.
(c) Read the Data List according to the displays on the tester.
HINT: When using Techstream with the engine switch off, turn on and off any of the door courtesy light switches repeatedly at 1.5 second intervals or less until communication between the tester and vehicle starts.

Main Body:

OK:
"ON" (engine switch on (ACC)) appears on the screen.
NG -- INSPECT RELAY (ACC RELAY)
OK -- Continue to next step.
2. CHECK ENGINE SWITCH CONDITION
(a) Check the power source mode changes.
(1) When the key is inside the vehicle and the shift lever is in the P position, check that pressing the engine switch causes the power source mode to change as follows:
OK:
off -> on (ACC) -> on (IG) -> off
NG -- GO TO OTHER FLOW CHART
OK -- Continue to next step.
3. CHECK DTC OUTPUT
(a) Delete the DTCs Reading and Clearing Diagnostic Trouble Codes.
(b) Check for DTCs again.
OK:
No DTC is output.
NG -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
OK -- USE SYMPTOM METHOD TO CHECK
4. INSPECT RELAY (ACC RELAY)

(a) Remove the ACC relay from the instrument panel junction block
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPLACE ACC RELAY
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - INSTRUMENT PANEL JUNCTION BLOCK)
(a) Disconnect the D8 connector from the main body ECU (instrument panel junction block).

(b) Disconnect the 1I connector from the instrument panel junction block.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (MAIN BODY ECU - INSTRUMENT PANEL JUNCTION BLOCK)
OK -- Continue to next step.
6. CHECK HARNESS AND CONNECTOR

(a) Disconnect the 1A and 1F connectors from the instrument panel junction block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)