IQA (Injector Quantity Adjustment) means adjusting fuel injection quantity difference between injectors which occurs inevitably at manufacturing process as allotting serial number consists of 7 letters to each injectors.
Inputting IQA code of injectors installed in each cylinder to ECM, ECM recognizes the fuel injection quantity difference between each injectors. ECM adjusts every injector to have same fuel injecting characteristic as recognizing specific fuel injection map which is different for each serial number.
P1670 is set when ‘IQA input error’ or ‘saving error’ occurs in EEP ROM where IQA data is saved. This code is due to ECM internal error.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● EEPROM monitorting | ● ECM internal error | ||
Enable Conditions | ● IG KEY "ON" | |||
Threshold Value | ● Input error, saving error occurs at injector IQA code inputting. | |||
Diagnostic Time | ● Immediately | |||
Fail Safe | Fuel Cut | NO | ● Engine Check Lamp blinks. | |
EGR Off | NO | |||
Fuel Limit | NO | |||
Check Lamp | YES | |||
