B2274

2AR-FE STARTING: SMART KEY SYSTEM: B2274: ACC Monitor Malfunction
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 to the ACC relay.

HINT
When the main body ECU 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 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 change.

(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

HINT
* If power mode does not change to ON (IG and ACC) Power Source Mode Does Not Change To ON (IG and ACC).
* If power mode does not change to ON (IG) Power Source Mode Does Not Change To ON (IG).
* If power mode does not change to ON (ACC) Power Source Mode Does Not Change To ON (ACC).

NG -- GO TO OTHER PROBLEM
OK -- Continue to next step.

3. INSPECT RELAY (ACC RELAY)

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

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

Standard resistance:

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

4. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - MAIN BODY ECU)

(a) Disconnect the E7 ECU connector.

(b) Disconnect the II J/B 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.

5. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B - BATTERY AND BODY GROUND)

(a) Disconnect the IF and IA J/B connectors.

(b) 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.

6. INSPECT INSTRUMENT PANEL J/B

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

Standard resistance:

NG -- REPLACE INSTRUMENT PANEL J/B

OK -- REPLACE MAIN BODY ECU