Diagnosis Procedure

1. Cycle the ignition switch ON several times, waiting 30 seconds between each cycle.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Check for DTC U040D being current on the CONSULT screen.

Is DTC U040D-00 detected as current?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .

1. Turn ignition switch OFF.
2. Disconnect rotary turbine control valve actuator harness connector F146.
3. Inspect the rotary turbine control valve actuator connector pins for the following:
   • Loose connector
   • Corroded pins
   • Bent or broken pins
   • Pushed back or expanded pins
   • Moisture in or on the connector
   • Missing or damaged connector seals
   • Dirt or debris on or in the connector pins
   • Connector shell broken
   • Wire insulation damage
   • Damaged connector locking tab

Is the inspection result normal?

YES

GO TO 3 .

NO

Repair or replace error-detected parts.

1. Connect rotary turbine control valve actuator harness connector F146.
2. Turn ignition switch ON.
3. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
4. Erase DTCs.
5. Turn ignition switch OFF.
6. Disconnect linkage from rotary turbine control valve actuator.
7. Turn ignition switch ON.
8. Rotary turbine control valve actuator should span.
9. Check for DTC U040D being current on the CONSULT screen.

Is DTC U040D-00 detected as current?

YES

Replace rotary turbine control valve actuator. Refer to Removal and Installation .

NO

GO TO 4 .

Inspect the rotary turbine control valve actuator linkage.

Is the inspection result normal?

YES

Refer to Intermittent Incident .

NO

Replace rotary turbine control valve actuator linkage. Refer to Exploded View .