Fault Codes - Kohler Command PRO ECH630 Service Manual

3. Remove the spark plugs and check for fuel at the
tips.
a. If there is fuel at the tips of the spark plugs the
fuel pump and injectors are operating.
b. If there is no fuel at the tips of the spark plugs,
check the following:
1) Make sure the fuel tank contains clean,
fresh, proper fuel.
2) Make sure that the vent in the fuel tank is
open.
3) Make sure the fuel tank valve (if so
equipped) is fully opened.
4) Make sure the batt ery is supplying proper
voltage.
5) Check that the fuses are good, and that no
electrical or fuel line connections are
damaged or broken.
6) Test fuel pump module operation as
described earlier under Fuel Pump –
Service.

Fault Codes

The ECU continuously monitors engine operation
against preset performance limits. If the operation
is outside the limits, the ECU activates the MIL, if
equipped, and stores a diagnostic code in its fault
memory. If the component or system returns to proper
function, the ECU will turn off the MIL. If the MIL
stays illuminated, it warns the customer a fault is
currently happening, and dealer service is required.
Upon receipt, the dealer technician can access the fault
code(s) to help determine what portion of the system
is malfunctioning. The 4-digit fault codes available are
listed on page 5.29.
The codes are accessed through the key switch and
displayed as blinks or fl ashes of the MIL. Access the
codes as follows:
1. Check that the batt ery voltage is above 11 volts.
2. Start with the key switch OFF.
3. Turn the key switch to the ON and OFF, then ON
and OFF, then ON, leaving it on in the third
sequence. Do not start the engine. The time
between sequences must be less than 2.5 seconds.
4. The MIL will blink a series of times. The number
of times the MIL blinks represents a number in
the blink code.
5. A sequence of four digits make up a fault code.
There is a one (1) second pause between the
blinks of a fault code. There is a three (3) second
pause between separate fault codes. Aft er the
fault code(s) are blinked a two digit 61 is blinked
to indicate the program has completed.
a. It's a good idea to write down the codes as
they appear, as they may not be in numerical
sequence.
b. Code 61 will always be the last code
displayed, indicating the end of code
transmission. If code 61 appears immediately,
no other fault codes are present.
Section 5
EFI Fuel System
5.27
5