- If there is a malfunction due to the ACC relay being stuck on, the ACC relay does not turn off even though the engine switch is off.
- If there is a malfunction due to the ACC relay being stuck off, the ACC relay does not turn on even though the engine switch is on (ACC).
| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM1000000012VNT |
| Model Year Start: 2018 | Model: Camry | Prod Date Range: [03/2017 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): B2274; ACC Monitor Malfunction; 2018 - 2024 MY Camry [03/2017 - ] | ||
|
DTC |
B2274 |
ACC Monitor Malfunction |
DESCRIPTION
This DTC is stored when a malfunction in the ACC output circuit is detected. The ACC output circuit is the circuit between terminal ACCD of the certification ECU (smart key ECU assembly) and the ACC relay.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
Note |
|---|---|---|---|---|
|
B2274 |
ACC Monitor Malfunction |
The ACC relay circuit of the certification ECU (smart key ECU assembly) is malfunctioning. (1-trip detection logic*) HINT: When the voltage at terminal ACCD is not at the standard, the system is determined to be malfunctioning. |
|
DTC Output Confirmation Operation:
|
- *: Only detected while a malfunction is present.
Vehicle Condition and Fail-safe Function when Malfunction Detected
|
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. |
- |
Related Data List and Active Test Items
|
DTC No. |
Data List and Active Test |
|---|---|
|
B2274 |
Power Source Control
Starting Control
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
-
The smart key system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.
Click here
![2018 - 2022 MY Camry [03/2017 - 08/2022]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function): HOW TO PROCEED WITH TROUBLESHOOTING](/t3Portal/stylegraphics/info.gif)
- Inspect the fuses of circuits related to this system before performing the following procedure.
-
Before replacing the certification ECU (smart key ECU assembly), refer to the smart key system (for Start Function) Precaution.
Click here
- After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) |
(a) Disconnect the K62 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the 3A, 3B and 3F instrument panel junction block assembly connectors.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
K62-16 (ACCD) - 3A-30 |
Always |
Below 1 Ω |
|
3B-3 - Body ground |
Always |
Below 1 Ω |
|
K62-16 (ACCD) or 3A-30 - Other terminals and body ground |
Always |
10 kΩ or higher |
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3F-1 - Body ground |
Always |
11 to 14 V |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
2. |
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (ACC RELAY) |
(a) Remove the instrument panel junction block assembly.
Click here
(b) Connect all of the instrument panel junction block assembly connectors.
(c) Connect the K62 certification ECU (smart key ECU assembly) connector.
(d) Measure the voltage according to the value(s) in the table below.
|
*a |
Component with harness connected (Instrument Panel Junction Block Assembly) |
- |
- |
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
3D-26 - Body ground |
Engine switch on (ACC) |
11 to 14 V |
| NG |
|
REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
|
|
|
3. |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) |
|
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
| OK |
|
END (TEMPORARY CONNECTION FAILURE IS SUSPECTED)
|
| NG |
|
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
|
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