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11.1.3 Three blinks alarms
1) STEER SENSOR KO
Cause: It occurs when the tacho-generator is open or short circuited.
Remedy: Check the tacho-generator wires and measure the tacho-generator
resistance (should be close to 22 Ohms). If the problem is not due to
wiring, replace the tacho-generator.
2) D LINE SENSOR KO
Cause: It occurs when the stepper motor channel on the CNB pin #3 is open.
Remedy: Check the stepper motor wires and measure the stepper motor line
D resistance (should be close to 30 Ohms between pin #3 CNB and
GND). If the problem is not due to wiring, replace the stepper motor.
3) Q LINE SENSOR KO
Cause: It occurs when the stepper motor channel on CNB pin #9 is open.
Remedy: check the stepper motor wires and measure the stepper motor line Q
resistance (should be close to 30 Ohms between pin #9 CNB and
GND). If the problem is not due to wiring, replace the stepper motor
4) F.B OUT OF RANGE
Cause: It occurs when the angle steering feedback pot has a broken
connection that means its wiper is higher than 4.7Vdc or smaller than
0.3Vdc.
Remedy: Check the steer angle feedback pot connections. If the problem is
not due to wiring, replace feedback pot. Below is the feedback pot
internal interface: when a connection is broken the pot wiper is stuck
at 0Vdc o 5Vdc.
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