4124 690 01 Rev. S KohlerEngines.com
EFI SYSTEM-ELECTRONIC THROTTLE BODY (ETB) ECH
ETB EFI with Analog Speed Control Wiring Harness* 20 Amp Detail with Key Switch (w/Jumper Harness)
A Stator B Rectifi er-Regulator C Purple D 30A Fuse
E Black F Key Switch Ground G Red H Battery
I 5-Terminal Connector J Red/White K White L Yellow
M Dark Blue N Red/Black O Pink P Fuel Pump Module
Q Grey R Red/Yellow S Tan T MIL
U Oil Light V Dark Green W
10A Fuse (Switched
Power)
X 8-Terminal Connector
Y Green/White Z Yellow/Black AA Starter Motor AB Oil Pressure Switch
AC
10A Fuse (Battery
Power)
AD Grey Connector AE Black Connector AF Black/White
AG Light Green AH Fuel Injector #1 AI Fuel Injector #2 AJ Ignition Coil #1
AK Ignition Coil #2 AL
Crankshaft Position
Sensor
AM Oxygen Sensor AN
Electronic Throttle
Body
AO TMAP Sensor AP
Engine Temperature
Sensor Lead
AQ
Diagnostic Connector
(8 Bay, 7 Pin)
*This main engine wiring harness will have an attached, application specifi c, 8-terminal jumper harness that connects
to application chassis harness. This main engine harness is not intended for use without this jumper harness.
NOTE: Do not attempt to make a connection to this main harness 8-terminal connector without jumper harness.
Failure to use this supplied jumper may damage ECU.
Jumper Harness (Must be used with ETB EFI with Analog Speed Control Wiring Harness)
A
B
D
F
H
A
C
E
G
J
L
K
I
F
A
8-Terminal Connector (Plugs
into Wiring Harness
8-Terminal Connector)
B Red/Yellow C Desired Speed D Dark Green
E
Oil Pressure Sensor (Plugs
into H)
F White G
Customer Connector
for Engine Kill
H
Kills Engine if Low Oil
Pressure (Plugs
into E)
I Grey J 5 V Out Covered K Red/White L 12 V Switched Power
Engines equipped with this jumper harness feature ETB-Analog speed control. Engine speed is adjusted using
variable voltage inputs received by ECU from OEM controller.
Voltage signal range is 0 to 5 volts max. Idle = 0 (zero) volts. Max high speed = 5 (fi ve) volts.
Any voltage between these two values yields a diff erent speed within range. If throttle system does not respond to
commands use these steps to test system.
Disconnect jumper terminal C (red/yellow wire) from OEM harness. Remove cover from jumper terminal J (grey wire
tied back). Start engine (idle approx. 1500 RPM), connect jumper terminals C and J together. Engine speed should
increase to high speed (approx. 3900 RPM).
If speed DOES increase, problem is with OEM control system. Consult OEM service information for OEM diagnostics.
If speed DOES NOT increase, problem is with engine ETB system. This can be tested using KOHLER
®
Diagnostic
System (KDS) Gen 2, see Tools and Aids. Select Throttle Position Test and follow instructions in help (?) area of test.
To Next Page
Loading...
