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 C101-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.
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 correct 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 running | |||
Threshold Value | ● TCM signal is not detected at A/T vehicle ● TCM signal is detected at M/T vehicle | |||
Diagnostic Time | ● 1.0 sec. | |||
Fail Safe | Fuel Cut | NO | ● Glow Lamp ON. | |
EGR Off | NO | |||
Fuel Limit | NO | |||
Check Lamp | OFF | |||
