DESCRIPTION
This DTC is stored when a malfunction in the ACC output circuit is detected. The ACC output circuit is the circuit that goes from the ACC output terminal of the certification ECU (smart key ECU assembly) to the ACC relay.
HINT:
When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.
DTC Code |
DTC Detection Condition |
Trouble Area |
DTC Output Confirmation Operation |
---|---|---|---|
B2274 |
Malfunction in the ACC relay circuit in the certification ECU (smart key ECU assembly) or in the external circuit (1-trip detection logic*). HINT: When the voltage at terminal ACCD is not at the standard, the system is determined to be malfunctioning. |
|
Wait 10 seconds after turning the engine switch on (ACC) or on (IG), and then wait another 10 seconds after turning the engine switch off. |
Vehicle Condition when Malfunction Detected |
Fail-safe Function when Malfunction Detected |
---|---|
HINT: The engine switch can be turned on (IG) and the engine can be started. |
- |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
DTC |
Data List Item |
Active Test Item |
---|---|---|
B2274 |
Power Source Control
Starting Control
|
- |
PROCEDURE
1. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE) |
NG |
REPAIR OR REPLACE HARNESS ORCONNECTOR IN CIRCUIT CONNECTED TOPOWER SOURCE |
|
2. |
CHECK HARNESS AND CONNECTOR (GROUND) |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECUASSEMBLY) - DRIVER SIDE JUNCTION BLOCK) |
(a) Disconnect the C29 connector from the certification ECU (smart key ECU assembly).
(b) Disconnect the connector from the driver side junction block.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
C29-9 (ACCD) - 1A-28 |
Always |
Below 1 Ω |
1D-5 - Body ground |
Always |
Below 1 Ω |
C29-9 (ACCD) or 1A-28 - Body ground |
Always |
10 kΩ or higher |
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK DRIVER SIDE JUNCTION BLOCK (ACC RELAY) |
(a) Remove the driver side junction block. (See page )
Text in Illustration
*a |
Component without harness connected (Driver Side Junction Block) |
- |
- |
(b) Remove the main body ECU (multiplex network body ECU) from the driver side junction block. (See page )
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
1K-1 - 1F-24 |
Battery voltage not applied to terminals 1A - 28 and 1D-5 |
10 kΩ or higher |
Battery voltage applied to terminals 1A - 28 and 1D-5 |
Below 1 Ω |
NG |
REPLACE DRIVER SIDE JUNCTION BLOCK |
|
5. |
INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
(a) Reconnect the certification ECU (smart key ECU assembly) connector.
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
OK |
USE SIMULATION METHOD TO CHECK |
NG |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
Does not Play even after Bluetooth Audio Mode is Selected
CAUTION / NOTICE / HINT
HINT:
Even if the portable player can play audio content, it may not be able to play
via the in-vehicle device. This does not necessarily indicate a malfunction of the
in-vehicle device.
PROCEDURE
1.
CHECK OPERATION
(a) Check if the po ...
Diagnosis System
DIAGNOSIS SYSTEM
DIAGNOSIS FUNCTION
(a) The diagnosis function turns off the cruise control indicator, illuminates
the master warning light and displays a warning message when a malfunction is detected.
When a malfunction is detected in the dynamic radar cruise control system, DTCs
are store ...
Terminals Of Ecu
TERMINALS OF ECU
CHECK ECM
HINT:
The standard voltage, resistance and waveform between each pair of the ECM terminals
is shown in the table below. The appropriate conditions for checking each pair of
the terminals is also indicated. The result of checks should be compared with the
standar ...