Vehilcles have many options in one type of ECM. So automatic recognition function is applied. The options that can be recognized are MT/AT, 2/4WD, DPF, etc). When a ECM is installed to vehicle, these options recognition are performed by the ECM automatically as checking whether ground line is grounded or opened every IG KEY ON process.
If this recognition is not fulfilled well or any error occurs during the process, engine power generation is not sufficient and glow lamp on cluster blinks.
If a system is intalled, the ECM connector is grounded.
Else is opened (no wire 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 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 |
•
IG KEY "ON" | |||
Threshold value |
•
TCM signal is not detected at A/T vehicle
•
TCM signal is detected at M/T vehicle | |||
Diagnosis Time |
•
1sec. | |||
Fail Safe | Fuel cut | NO |
•
Glow lamp blinking | |
EGR Off | NO | |||
Fuel Limit | NO | |||
MIL | OFF | |||
