Dtc B2274 Acc Monitor Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER

CHECK ENGINE SWITCH CONDITION

INSPECT RELAY (ACC RELAY)

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

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

INSPECT INSTRUMENT PANEL J/B

DESCRIPTION

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.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. Connect the intelligent tester to the DLC3.
   

2. Turn the engine switch on (IG).
   

3. Turn the intelligent tester on.
   

   HINT:

   When using intelligent tester 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.

4. Enter the following menus: Body / Body / Data List.
   

5. Read the Data List according to the displays on the tester.
   
   

   Body:

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   ACC Relay Mon	Status of ACC Relay Monitor / ON or OFF	ON: Engine switch on (ACC) OFF: Engine switch off	-

   OK:

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

1. 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:

      1. If power mode does not change to ON (IG and ACC) (CAMRY_ACV40 RM0000020S906WX.html).
         
      2. If power mode does not change to ON (IG) (CAMRY_ACV40 RM0000020SA027X.html).
         
      3. If power mode does not change to ON (ACC) (CAMRY_ACV40 RM0000020SB027X.html).
         

1. Remove the ACC relay from the instrument panel J/B.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   3 - 5	When battery voltage is not applied to terminals 1 and 2	10 kΩ or higher
   3 - 5	When battery voltage is applied to terminals 1 and 2	Below 1 Ω

1. Disconnect the E7 ECU connector.
   

   
   
   
   

2. Disconnect the II J/B connector.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   II-3 - E7-22 (ACCD)	Always	Below 1 Ω
   E7-22 (ACCD) or II-3 - Body ground	Always	10 kΩ or higher

1. Disconnect the IF and IA J/B connectors.
   

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

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   IF-10 - Body ground	Always	Below 1 Ω

3. Measure the voltage according to the value(s) in the table below.
   

   Standard Voltage:

   Tester Connection	Condition	Specified Condition
   IA-1 - Body ground	Always	11 to 14 V

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

   
   
   
   

   Standard Resistance:

   Tester Connection	Condition	Specified Condition
   ACC relay terminal 1 - IF-10	Always	Below 1 Ω
   ACC relay terminal 2 - II-3	Always	Below 1 Ω
   IF-10 - Body ground	Always	10 kΩ or higher
   II-3 - Body ground	Always	10 kΩ or higher