THEFT DETERRENT / KEYLESS ENTRY ENTRY AND START SYSTEM(for Start Function) 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*)
|
·
Instrument panel junction block assembly (ACC relay) ·
Certification ECU (smart key ECU assembly) ·
Harness or connector |
DTC Output Confirmation Operation:
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. |
*: Only detected while a malfunction is present.
| Vehicle Condition when Malfunction Detected | Fail-safe Function when Malfunction Detected |
|---|---|
·
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).
|
- |
| DTC No. | Data List and Active Test |
|---|---|
| B2274 | Power Source Control
·
ACC Relay Monitor |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
- NOTICE:
- ·
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 Model Code "KEY REGIST" 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.
·The entry and start 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 entry and start system (for Start Function) after confirming that the communication systems are functioning properly.
·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 Service Bulletin.
·After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
PROCEDURE
Disconnect the 3A and 3B instrument panel junction block assembly connectors.
Disconnect the N156 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 N156-16 (ACCD) - 3A-30 Always Below 1 Ω 3B-3 - Body ground Always Below 1 Ω N156-16 (ACCD) or 3A-30 - Other terminals and body ground Always 10 kΩ or higher
- Result:
Proceed to OK NG
OK
NG
| *a | Component with harness connected
(Certification ECU (Smart Key ECU Assembly)) |
Reconnect the certification ECU (smart key ECU assembly) connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
Tester Connection Switch Condition Specified Condition N156-16 (ACCD) - Body ground Engine switch off → Engine switch on (ACC) 1 V or less → 8.5 V or higher
- Result:
Proceed to OK NG
OK
for LHD:
for RHD:
NG