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URAL ENGINE MANAGEMENT SYSTEM BLINK DIAGNOSTICS
Introduction
A basic blink code system has been implemented on the Ural EFI bikes to aid EMS (Engine Management System)
diagnostics without the need for an additional computer diagnostic tool, greatly helping the user when during
travels. When activated, the MIL (malfunction indicator lamp) blinks out a code sequence relating to the fault.
This document is intended as a quick reference guide as supplemental information to the EMS Service Manual.
Operation
When the MIL is continuously lit with the key on, an EMS fault has occurred. With the key on and engine off,
toggle the kill switch three times within a two second timeframe to initiate the blink sequence. Three changes
are required, not three complete kill-run cycles. For example, if the switch is in engine kill state, the sequence
would be “ Kill -> Run -> Kill -> Run ” with the ‘ -> ’ indicating a flick of the switch.
The MIL will now blink a code sequence corresponding with the EMS ’ s diagnosed fault. Each code has a three
digit sequence, with each digit having a value of 1-5. A short pause occurs between individual digits, while a
long pause between repeating the code or displaying the next code, depending on the number of fault events.
To identify the fault, initiate the blink sequence, and count out blinks for each of the three digits. Writing down
the pattern helps. The light will blink on half second intervals for each digit. Between each digit, a one second
pause will occur. Between each blink code, or the repetition of the code if a single fault is present, a three
second pause exists. When a fault presents a specific component on the vehicle system, the component must
be inspected, along with electrical connections and harness components leading up to the component. This will
aid in diagnosing and fixing the problem.
The blink sequence will continue to repeat until the function is deactivated. To deactivate the feature, toggle
the kill switch three times within a two second time-frame, the same as to activate the feature.
Fault Category
The first digit is used to indicate the category of fault. This helps to identify if the problem is specific to one ECU
or to the vehicle as a whole. These categories are defined as follows:
First Digit
Value
Category Description
1 Cylinder 1 Faults Faults specific to the left EMS
2 Cylinder 2 Faults Faults specific to the right EMS
3 System Faults Vehicle level EMS faults