DTC Code | DTC Name |
---|---|
B2274 | ACC Monitor Malfunction |
DESCRIPTION
This DTC is stored when a malfunction in the ACC output circuit between the ACC output terminal of the certification ECU (smart key ECU assembly) and the ACC relay is detected.
Tech Tips
When the battery cable is disconnected and reconnected, the power source returns to the mode it was in before the battery cable was disconnected.
DTC No. | DTC Detection Condition | Trouble Area | DTC Output Confirmation Operation |
---|---|---|---|
B2274 | Malfunction in the ACC relay activation circuit in the certification ECU (smart key ECU assembly) or the external circuit (1-trip detection logic*1). Tech Tips 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. Tech Tips To turn the engine switch on (ACC), carry the key and press the engine switch with the shift lever in P*2 or N*3 and the brake pedal*2, *3 or clutch pedal*4 released. |
*1: Only output while a malfunction is present and the engine switch is on (IG)
*2: for CVT
*3: for Multi-Mode Manual Transaxle
*4: for Manual Transaxle
Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
---|---|
Tech Tips The engine switch can be turned on (IG) and the engine can be started. |
- |
DTC No. | Data List Item | Active Test Item |
---|---|---|
B2274 |
Power Source Control
Starting Control |
- |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Note
When using the intelligent tester with the engine switch off to troubleshoot:
Connect the intelligent tester to the DLC3 and turn a courtesy light switch on and off at 1.5 second intervals until communication between the intelligent tester and vehicle begins.
The entry and start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.
Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Entry Function) Click here.
After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
Inspect the fuses of circuits related to this system before performing the following inspection procedure.
Tech Tips
Related Data List and Active Test Items
DTC No. | Data List Item | Active Test Item |
---|---|---|
B2274 | Power Source Control
Starting Control
|
- |
PROCEDURE
CHECK HARNESS AND CONNECTOR (POWER SOURCE)
*a | Rear view of harness connected (to Certification ECU (Smart Key ECU Assembly)) |
Disconnect the F65 certification ECU (smart key ECU assembly) connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE |
OK |
CHECK HARNESS AND CONNECTOR (GROUND)
*a | Rear view of harness connected (to Certification ECU (Smart Key ECU Assembly)) |
Disconnect the F65 certification ECU (smart key ECU assembly) connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||
---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - CERTIFICATION ECU)
Disconnect the F63 certification ECU (smart key ECU assembly) connector.
Disconnect the 3B instrument panel junction block assembly connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY)
Remove the instrument panel junction block assembly Click here.
Remove the main body ECU from the instrument panel junction block assembly.
Measure the resistance according to the value(s) in the table below.
*A | for LHD | *B | for RHD |
*a | Component without harness connected (Instrument Panel Junction Block Assembly) |
- | - |
Standard Resistance | ||||||||
---|---|---|---|---|---|---|---|---|
|
||||||||
|
NG |
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here |
OK |
INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
Install the main body ECU to the instrument panel junction block assembly Click here.
Install the instrument panel junction block assembly.
*a | Component with harness connected (Certification ECU (Smart Key ECU Assembly)) |
Reconnect the F63 certification ECU (smart key ECU assembly) connector.
Measure the voltage according to the value(s) in the table below.
Standard Voltage | ||||||
---|---|---|---|---|---|---|
|
OK |
USE SIMULATION METHOD TO CHECK Click here |
NG |
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |