DTC Description
DTC DETECTION LOGIC
DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condit |
P0078 | EX V/T ACT/CIRC-B1 (Exhaust valve control solenoid circuit bank 1) | An improper voltage is sent to the ECM through exhaust valve timing control solenoid valve. |
POSSIBLE CAUSE
FAIL-SAFE
Device fix mode
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
>> GO TO2.
2.PERFORM DTC CONFIRMATION PROCEDURE
Is 1st trip DTC detected? YES >> Proceed to EC-195, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY
Is the inspection result normal? YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
3.CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE GROUND CIRCUIT
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE
Check the exhaust valve timing control solenoid valve. Refer to EC-183, "Component Inspection".
Is the inspection result normal? YES >> GO TO 5.
NO >> Replace exhaust valve timing control solenoid valve.
5.CHECK INTERMITTENT INCIDENT
Refer to GI-41, "Intermittent Incident".
>> INSPECTION END
Component Inspection
1.CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE-1
Is the inspection result normal?
YES >> GO TO 2.
NO >> Replace exhaust valve timing control solenoid valve. Refer to EM-44, "Exploded View".
2.CHECK EXHAUST VALVE TIMING CONTROL SOLENOID VALVE-2
CAUTION: Do not apply 12 V DC continuously for 5 seconds or more.
Doing so may result in damage to the coil in exhaust valve timing control solenoid valve.
NOTE: Always replace O-ring when exhaust valve timing control solenoid valve is removed.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace exhaust valve timing control solenoid valve. Refer to EM-44, "Exploded View".
Heating and cooling unit assembly
Exploded View
Steering Member
Heating and cooling unit assembly
Steering member
Bolt
Nut
Automatic Air Conditioning
Wiring harness
Air mix door duct (LH)
Air mix door duct (RH)
Intake housing gasket
Blower motor
Front foot duct (RH)
...
Symptom diagnosis
DRIVER ASSISTANCE SYSTEM SYMPTOMS
Symptom Table
LANE DEPARTURE WARNING SYSTEM SYMPTOMS
NOTE:
Refer to the following the operation condition of the Lane Departure Warning
system.
Lane Departure Warning system: DAS-16, "LDW : System
Description".
BLIND SPOT WARNING ...
C119A vacuum sensor
DTC Logic
DTC DETECTION LOGIC
DTC
Display Item
Malfunction detected condition
Possible causes
C119A
VACUUM SEN VOLT
When a malfunction is detected in supply power voltage
of vacuum sensor.
Harness or connector
Vacuum sensor (brake booster)
...