Circuit/System Verification

Engine running for 10 s.
Ignition ON/Vehicle In Service Mode, engine OFF, verify DTC U0400-U05FF is not set.
- If DTC U0400-U05FF is set along with other DTCs set or symptoms
  Diagnose all other DTCs or symptoms first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle , or Symptoms - Vehicle .
- If DTC U0400-U05FF is set without other DTCs set or symptoms
1. Program the device specified by the DTC descriptor.
2. Verify the DTC does not set.
  - If the DTC sets, replace the appropriate device.
  - If the DTC does not set
3. All OK.
- If DTC U0400-U05FF is not set
All OK