Introduction; Powering The Ecm - Kohler KG2204 Service

4.1. Introduction

Many of the troubleshooting steps require the use of a
digital Volt-Ohm meter (DVOM) when checking for
voltage and resistance and may also require the ECM
to be either powered or turned off. The troubleshooting
steps cover the following sensors and components:

Coolant Temperature Sensor

Crankshaft Position (CKP) Sensor

Electrical System Intermittent Problems

Fuel Control Valve

Heated Exhaust Gas Oxygen (HEGO) Sensor

Ignition Coil

Oil Pressure Sender

TMAP and MAP Sensors

Throttle Position (TP) Sensor

4.2. Powering the ECM

WARNING
Risk of Fire. Can cause severe injury or death.
Do not smoke or permit flames or sparks near fuels or the
fuel system.
Troubleshooting and/or repairing the sensors or the
ECM. A backfire due to an open fuel shut-off valve can
cause severe injury or death. If power is supplied to the
shut-off valve during ECM or sensor troubleshooting, fuel
may enter the air intake manifold or the air cleaner and
cause a backfire. Make sure that the fuel supply is turned
OFF and that the
DISCONNECTED from the power source BEFORE
turning the ECM power on.
TP-6903 5/16a
fuel shut-off valves
These instructions explain how to turn the ECM power
on and off on generator sets equipped with the Kohler®
RDC2 generator set controller.
To turn the ECM power ON and OFF using Kohler®
SiteTech™ software:
Use SiteTech™ to connect to the equipment
controller.
Locate ECM Power under the Genset System
Configuration group.
Change the setting to ON to power the ECM.
Change the setting to OFF to turn off the ECM
power.
To turn the ECM power ON and OFF using the
RDC2 controller:
From the main menu, scroll down (press the
Down arrow) to Overview and press the
Selection button.
In the Overview menu, scroll down to SW
Version. Press and hold the Selection button until
the display shows ECM powered to power the
ECM.
Press the Stop button to turn off the ECM power.
1
7
6
are
1. 2-line LCD display
2. Up button
3. Select button
4. Down button
5. RUN button
6. OFF button
7. AUTO button
Figure 4-1 RDC2 Controller Interface
Electrical System and Sensor Troubleshooting
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3
4
5
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