DTC Logic
DTC DETECTION LOGIC
DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition | Possible cause |
P1078 | EXH TIM SEN/CIRC-B1 (Exhaust valve timing control position sensor circuit bank 1) | An excessively high or low voltage from the sensor is sent to ECM. |
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DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
Is 1st trip DTC detected? YES >> Proceed to EC-359, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK EXHAUST VALVE TIMING (EVT) CONTROL POSITION SENSOR POWER SUPPLY
Is the inspection result normal? YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Check sensor power supply 2 circuit. Refer to EC-444, "Diagnosis Procedure".
Is inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
3.CHECK EVT CONTROL POSITION SENSOR GROUND CIRCUIT
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK EVT CONTROL POSITION SENSOR INPUT SIGNAL CIRCUIT
Is the inspection result normal? YES >> GO TO 5.
NO >> Repair or replace error-detected parts.
5.CHECK EVT CONTROL POSITION SENSOR
Check the EVT control position sensor. Refer to EC-360, "Component Inspection (EVT Control Position Sensor)".
Is the inspection result normal? YES >> GO TO 6.
NO >> Replace EVT control position sensor. Refer to EM-60, "Removal and Installation".
6.CHECK CAMSHAFT (EXT)
Check the following.
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".
NO >> Remove debris and clean the signal plate of camshaft rear end or replace camshaft. Refer to EM-60, "Removal and Installation".
Component Inspection (EVT Control Position Sensor)
1.EXHAUST VALVE TIMING (EVT) CONTROL POSITION SENSOR-1
Is the inspection result normal? YES >> GO TO 2.
NO >> Replace EVT control position sensor. Refer to EM-60, "Removal and Installation".
2.EVT CONTROL POSITION SENSOR-2
Check resistance EVT control position sensor terminals as shown below.
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace EVT control position sensor. Refer to EM-60, "Removal and Installation".
Precaution
Precaution for supplemental restraint system (srs)
"air bag" and "seat belt pre-tensioner"
The supplemental restraint system such as “air bag” and “seat belt pre-tensioner”,
used along
with a front seat belt, helps to reduce the risk or severity of injur ...
Brake pedal position switch
Component Function Check
1.CHECK BRAKE PEDAL POSITION SWITCH FUNCTION
With CONSULT
Turn ignition switch ON.
Select “ENGINE” using CONSULT.
Select “BRAKE SW1” in “DATA MONITOR” mode.
Check “BRAKE SW1” indication under the following conditions.
...
Interior room lamp control circuit
Description
Controls each interior room lamp (ground side) by pwm signal.
Note:
Pwm signal control period is approximately 250 hz (in the gradual
brightening/dimming).
Component function check
Caution:
Before performing the diagnosis, check that the following are normal.
Interior room l ...