DESCRIPTION
This DTC is stored when there is a problem in the ACC output circuit, which is from the ACC output terminal of the power management control ECU to the ACC relay.
HINT:
When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) battery terminal, the power source mode is reset to on (IG). When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.
DTC Code |
DTC Detection Condition |
Trouble Area |
---|---|---|
B2274 |
The ACC relay actuation circuit inside the power management control ECU or other related circuit is malfunctioning. |
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (BATTERY - POWER MANAGEMENT CONTROL ECU) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
2. |
CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY (ACC RELAY) |
(a) Remove the driver side junction block assembly. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
2C-48 - 2B-4 |
20°C (68°F) |
101.25 to 123.75 Ω |
*a |
Component without harness connected (Driver Side Junction Block Assembly) |
NG | ![]() |
REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
|
4. |
CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - DRIVER SIDE JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the F80 power management control ECU connector.
(b) Disconnect the 2C driver side junction block assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
F80-19 (ACCD) - 2C-48 |
Always |
Below 1 Ω |
F80-19 (ACCD) - Body ground |
Always |
10 kΩ or higher |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - BODY GROUND) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
6. |
CHECK POWER MANAGEMENT CONTROL ECU |
(a) Connect the power management control ECU connector.
*a |
Component with harness connected (Power Management Control ECU) |
- |
- |
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection |
Switch Condition |
Specified Condition |
---|---|---|
F80-19 (ACCD) - Body ground |
Engine switch off |
Below 1 V |
Engine switch on (ACC) |
((Voltage at terminal AM21 or AM22) minus 2.0 V) or higher |
OK | ![]() |
USE SIMULATION METHOD TO CHECK |
NG | ![]() |
REPLACE POWER MANAGEMENT CONTROL ECU |
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. CHECK STEERING PAD (VEHICLE NOT INVOLVED IN COLLISION)
(a) Perform a diagnostic system check (See page
).
(b) With the steering pad installed on the vehicle, perform a visual check. If
there are any defects as mention ...
Operating the lights and wipers
Headlight switch
The headlights can be operated manually or automatically.
Turning the end of the lever turns on the lights as follows:
Type A
1. The daytime running lights
turn on.
2. The side marker,
parking, tail, license plate, daytime r ...