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P1631 TCU Communication Line Malfunction
AutoHex Online Help: Hyundai TERRACAN(HP) 2004
DTC TROUBLESHOOTING PROCEDURE
DTC P1631 | COMMUNICATION ERROR WITH ECM |
DTC DETECTING CONDITIONItem | Detecting Contion | Possible cause |
DTC Strategy | ? | ? Open or Short in CAN communication harness ? Faulty ECM ? Faulty TCM |
Enable Conditions | ? After 0.2sec. passed from IG ON. ? During No failure of BUS OFF |
Threshold Value | ? To detect the nothing of EMS1 or EMS2 signal on CAN BUS |
Diagnostic Time | ? continued for 2.0 sec. |
Fail Safe | ? Line Pressure is full. ? No Torque Reduction at shifting/Squat Control/Up Slope Mode/Down Slope Mode/L-UP/Coast Control. ? TCU judges Throttle Opening is 0% for shifting. ? To inhibit failure detection(No ID/L4 SW Malfunction/Engine High Range/Transmission Fluid Sensor/SOL Malfunction). ? TCU judges Engine Water Temperature is normal condition(80Degrees)/Engine Revolution 7000rpm/Engine Torque 350Nm/Driving cycle Detect. |
Pass Criteria | ? To detect the BUS normal signal for 2.0sec continuously. |