A "hot at all times" from engine control relay is supplied to EPS CM as fail safe relay when EPS CM is "ON". EPS CM uses this as the source in EPS motor and system.
Item | Detecting Condition | Possible Cause |
DTC strategy | ● Voltage check | ● Open/short in power. ● Contact resistance in connections. ● Poor contact of fail-safe relay. ● Faulty charging system.. ● Low idle rpm. ● Loose alternator belt tension. |
Enable conditions | ● IG "ON" ● Fail-safe relay "ON" ● Engine speed 500 rpm | |
Threshold value | ● Fail-safe relay contact voltage < 9 V | |
Diagnosis time | ● 5 sec | |
Fail safe | ● Motor : Current decrease 45A / 4sec ● Relay : ON ● Fail lamp : ON ● Restoration condition : Fail-safe relay voltage ≥ 10 V |
