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.
【IQA(Injector Quantity Adjustment)】IQA 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.
P1670 is set when ‘IQA read or write error’ occurs in EEP ROM where IQA data is saved. This code is due to incorrect input of IQA code to ECM.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● EEPROM monitoring | ● ECM internal error | ||
Enable Conditions | ● IG KEY "ON" | |||
Threshold Value | ● Incorrect input of IQA code to ECM. | |||
Diagnostic Time | ● Immediately | |||
Fail Safe | Fuel Cut | NO | ● Engine Check Lamp blinks. | |
EGR Off | NO | |||
Fuel Limit | NO | |||
Check Lamp | BLINK | |||
