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DTC B2274: ACC Monitor Malfunction [10/2018 - ]: Description

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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.
  • Instrument panel junction block assembly
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector
 DTC Output Confirmation Operation: 
  1. Wait 10 seconds after turning the power switch on (ACC) or on (IG), and then wait another 10 seconds after turning the power switch off.
  1. *: 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
  • If there is a malfunction due to the ACC relay being stuck on, the ACC relay does not turn off even though the power 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 power switch is on (ACC).
HINT: The power switch can be turned on (IG) and the hybrid control system can be started.		 -
RELATED DATA LIST AND ACTIVE TEST ITEMS

DTC No. Data List and Active Test
B2274 Power Source Control 
  • ACC Relay Monitor
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