Because both A/T and M/T fuel control map is inputted in one type of ECM and selecting option is possible, one type is applied to both A/T and M/T option
When ECM is installed to vehicle, A/T and M/T recognition is performed by ECM automatically as checking whether ground line(ECM connector CUD-K terminal 81) is grounded or opened.(A/T and M/T recognition is performed every IG KEY ON process.)
If A/T, M/T recognition is not fulfilled well or any error occurs during the process, engine power generation is not sufficient and glow lamp on cluster blinks.
A/T : ECM connector CUD-K terminal 81 is grounded
M/T : ECM connector CUD-K terminal 81 is opened(no wiring exists)
P1588 is set when the signal from A/T, M/T auto recognition terminal(ECM CUD-K terminal 81) changes during engine run. This code is due to open in terminal for A/T option, grounded condition for M/T option. This code is normally arises from A/T option vehicle. Check the grounding condition of A/T, M/T auto recognition terminal.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● Voltage monitoring | ● A/T, M/T recognition terminal circuit ● ECM component failure | ||
Enable Conditions | ● Engine run | |||
Threshold Value | ● A/T, M/T auto recognition signal changes at engine ON. | |||
Diagnostic Time | ● 1.0 sec. | |||
Fail Safe | Fuel Cut | NO | ● Glow Lamp blinks. | |
EGR Off | NO | |||
Fuel Limit | NO | |||
Check Lamp | NO | |||
