GD(H6DO)-12
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
E: DTC P0026 INTAKE VALVE CONTROL SOLENOID CIRCUIT RANGE/PER-
FORMANCE (BANK 1)
1. OUTLINE OF DIAGNOSIS
Detected as NG with either Low NG or High NG.
A variable valve lift diagnosis oil pressure switch is installed for diagnosis. It is possible to determine whether
the intake valve is in high mode (increase the amount of lift) or in low mode (suppressing the amount of lift)
when the variable valve lift diagnosis oil pressure switch is turned ON or OFF.
Normal
Low NG
When the variable valve lift diagnosis oil pressure switch remains OFF even though the intake valve tried to
enter high mode (oil switching solenoid valve duty is large), this is judged as a Low NG.
High NG
When the variable valve lift diagnosis oil pressure switch remains ON even though the intake valve tried to
enter low mode (oil switching solenoid valve duty is small), this is judged as a High NG.
Oil switching solenoid valve duty Intake valve Variable valve lift diagnosis oil pressure switch
Large High Mode ON
Minimum Low Mode OFF
GD(H6DO)-189
Diagnostic Trouble Code (DTC) Detecting Criteria
GENERAL DESCRIPTION
DK:DTC P1443 VENT CONTROL SOLENOID VALVE FUNCTION PROBLEM
1. OUTLINE OF DIAGNOSIS
Detect the abnormal functioning (stuck closed) of drain valve.
Judge as NG when fuel tank pressure is low.
2. COMPONENT DESCRIPTION
The drain valve adjusts the pressure in the canister by introducing/extracting air when pressure differences
occur in the canister with the atmospheric pressure.
3. ENABLE CONDITIONS
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
Abnormality Judgment
Judge as NG when the continuous time of completing the malfunction criteria below becomes more than 3
seconds.
Time Needed for Diagnosis: 3 seconds
Malfunction Indicator Light: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear the NG when the malfunction criteria below are met.
6. DTC CLEAR CONDITION
•When the OK idling cycle is completed 40 times in a row
•When “Clear Memory” is performed
Secondary Parameters Enable Conditions
Battery voltage≥ 10.9 V
Ignition switch ON
Atmospheric pressure≥ 75.0 kPa (563
mmHg, 22.17 inHg)
Ta n k p r e s s u r e w h e n s t a r t e r i s O F F →
ON
–0.53 ←→ 0.39 kPa (–
4 ←→ 2.9 mmHg, –
0.16 ←→ 0.12 inHg)
Drain valve Open
Judgment Value
Malfunction Criteria Threshold Value
Ta n k p r e s s u r e≤ – 4.0 kPa (–30
mmHg, –1.18 inHg)
Judgment Value
Malfunction Criteria Threshold Value
Ta n k p r e s s u r e > – 4 . 0 k P a ( – 3 0
mmHg, –1.18 inHg)
Cumulative time when all of the malfunc-
tion criteria below is completed.
≥ 30 sec.
Purge control solenoid valve duty Not = 0
Fuel temp. –10 ←→ 45°C (14
←→ 113°F)
Intake manifold relative pressure≤ – 26.7 kPa (–200
mmHg, –7.87 inHg)
