| DTC Code | DTC Name |
|---|---|
| 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 that goes from the ACC output terminal of the certification ECU (smart key ECU assembly) to the ACC relay.
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*).
Tip:
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. |
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*: Only detected while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
|---|---|
Tip:
The engine switch can be turned on (IG) and the engine can be started. |
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| DTC | Data List Item | Active Test Item |
|---|---|---|
| B2274 |
|
- |
CAUTION / NOTICE / HINT
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When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus:
Body Electrical / Entry&Start. While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
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The entry and start system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (Click here). Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
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Before replacing the certification ECU (smart key ECU assembly), refer to the entry and start system (for Start Function) precaution (Click here).
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Inspect the fuses of circuits related to this system before performing the following inspection procedure.
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After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
PROCEDURE
- Click here
CHECK HARNESS AND CONNECTOR (POWER SOURCE)
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Disconnect the E130 certification ECU (smart key ECU assembly) connector.
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Measure the voltage according to the value(s) in the table below.
Standard Voltage Tester Connection Condition Specified Condition E130-10 (+B) - Body ground Always 11 to 14 V Table 3. Text in Illustration *a Front view of wire harness connector
(to Certification ECU (smart key ECU assembly))
- OKClick here
- NG
REPAIR OR REPLACE HARNESS ORCONNECTOR IN CIRCUIT CONNECTED TOPOWER SOURCE
-
- Click here
CHECK HARNESS AND CONNECTOR (GROUND)
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Disconnect the E130 certification ECU (smart key ECU assembly) connector.
-
Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition E130-11 (E) - Body ground Always Below 1 Ω Table 4. Text in Illustration *a Front view of wire harness connector
(to Certification ECU (smart key ECU assembly))
- OKClick here
- NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
-
- Click here
CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - COWL SIDE JUNCTION BLOCK LH)
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Disconnect the E130 certification ECU (smart key ECU assembly) connector.
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Disconnect the 2J cowl side junction block LH connector.
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Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition E130-9 (ACCD) - 2J-18 Always Below 1 Ω 2J-1 - Body ground E130-9 (ACCD) or 2J-18 - Body ground 10 kΩ or higher
- OKClick here
- NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
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- Click here
CHECK COWL SIDE JUNCTION BLOCK LH (ACC RELAY)
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Remove the cowl side junction block LH.
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for LHD:Click here.
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for RHD:Click here.
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Measure the resistance according to the value(s) in the table below.
Table 5. Text in Illustration *a Component without harness connected
(Cowl Side Junction Block LH)
- - Standard Resistance Tester Connection Condition Specified Condition 2G-1 - 2I-51 Battery voltage not applied to terminals 2J-18 and 2J-1 10 kΩ or higher Battery voltage applied to terminals 2J-18 and 2J-1 Below 1 Ω Table 6. Result Result Proceed to OK A NG for LHD B for RHD C
- AClick here
- B
REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)
- C
REPLACE COWL SIDE JUNCTION BLOCK LH (Click here)
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- Click here
INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
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Reconnect the E130 certification ECU (smart key ECU assembly) connector.
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Install the cowl side junction block LH.
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for LHD:Click here.
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for RHD:Click here.
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Measure the voltage according to the value(s) in the table below.
Standard Voltage Tester Connection Condition Specified Condition E130-9 (ACCD) - Body ground Engine switch off → Engine switch on (ACC) 1 V or less → 8.5 V or higher Table 7. Text in Illustration *a Component with harness connected
(Certification ECU (Smart Key ECU Assembly))
- OK
USE SIMULATION METHOD TO CHECK (Click here)
- NG
REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
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