P1094 (U5/Low Emissions)

DTC P1094 - TUMBLE GENERATED VALVE SIGNAL 1 CIRCUIT MALFUNCTION (OPEN)

OUTLINE OF DIAGNOSIS
Detect the open or short circuit of tumble generated valve motor.
Judge NG when the open signal is sent from IC after tumble generated valve driving IC diagnosis.




COMPONENT DESCRIPTION




ENABLE CONDITION

GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.

DIAGNOSTIC METHOD




Judge NG when the malfunction criteria are completed by tumble generated valve driving IC, and then NG signal is sent to main IC. At the main IC, judge NG when the NG signal is sent continuously during 3.5 seconds. Judge OK and clear the NG when the OK signal is sent.

DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When "Clear Memory" was performed

MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When "Clear Memory" was performed

FAIL SAFE
Tumble generated valve control: Not allowed to move tumble generated valve.

Basic advance angle
- Change the map for calculating to the map for malfunction of the tumble generator valve.

Electronic control throttle
- Change the angle operation of accelerator position sensor demand target throttle opening calculation to the map for malfunction of the tumble generator valve.

ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)