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)
P1587 is set when ECM is recognized as 1)A/T but CAN communication signal is not transmitted from TCM 2)M/T but CAN communication signal is transmitted from TCM. After checking if A/T, M/T auto recognition terminal is normal for each vehicle option, if no problem is detected, check poor connection in CAN communication circuit or CAN communication problem of TCM.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● Voltage monitoring | ● A/T, M/T recognition terminal circuit ● CAN communication line circuit ● TCM component failure ● ECM component failure | ||
Enable Conditions | ● Engine run | |||
Threshold Value | ● When TCM signal(through CAN communication) opposite to recognized data(A/T or M/T) at ECM is detected. | |||
Diagnostic Time | ● 1.0 sec. | |||
Fail Safe | Fuel Cut | NO | ● Glow Lamp blinks. | |
EGR Off | NO | |||
Fuel Limit | NO | |||
Check Lamp | NO | |||
