Lamp Codes - Northern Lights NL773LW4 Operator's Manual

Lamp Flashing Pattern when Error has Occurred
Before starting the engine:
1. Check all connections before powering the Engine ECU on.
2. When the Engine ECU is powered on (assuming no failures), the lamp will flash one time and then off.
3. If an Engine ECU failure is detected, the lamp will flash one of the codes below.
4. To resolve an Engine ECU failure, turn power off, check and connect wiring connections and power on again.
Figure 16: Lamp Codes
Lamp Code Reason For Error
13 Oil pressure SW failure or wire disconnected Engine ECU Power ON (EG Start Enable)
22 Pressure Sensor failure or wire disconnected
33 Pressure Sensor failure or wire disconnected
15 Speed Sensor Failure or wire disconnected
04 Actuator drive wire disconnected
Lamp Code Analysis
Lamp Code specifies the pattern of long and short flashes the ECU uses to indicate a particular problem.
The lamp will continue flashing as shown below until the error is resolved.
Case 1. Error Only:
Code: 13: Long, Short, Short, Short
Long
1 Cycle
Case 2. Error combination (when 2 errors occur at the same time):
Code 13: 13 means Long, Short, Short, Short
Code 04: 04 means Short, Short, Short, Short
Long
Updated 11-26-13
Troubleshooting
Error Dectection
Engine ECU Power ON (EG Start Enable)
Engine running
Engine ECU Power ON (EG Start Enable)
Engine running
Cranking
Engine Running
Engine ECU Power ON
Cranking
Short Short Short
Short Short Short
1 Cycle
ONL773LW4 5/21
Long Short
1 Cycle (repeated)
Short Short
23
After Error Detection
Go to Low Power Mode
Go to Low Power Mode
Go to Low Power Mode
Go to Low Power Mode
Go to Low Power Mode
Engine doesn't start
Go to Low Power Mode
Lamp action only
Engine doesn't start
Short Short
Short Short