Kohler command pro ECH749 Service Manual page 81

Example of Diagnostic Display
After the problem has been corrected, fault codes may be cleared as follows.
1. Disconnect negative (-) battery cable from battery terminal, or remove main fuse for ECU for approximately 1
minute.
2. Reconnect cable and tighten securely, or reinstall main fuse. Start engine and allow it to run for several minutes.
MIL should remain off if problem was corrected, and fault codes should not reappear (codes 31, 32, 33, and 34
may require 10-15 minutes of running to reappear).
Following chart lists fault codes, what they correspond to, and what visual indications will be. Following chart is a
list of individual codes with an explanation of what triggers them, what symptoms might be expected, and probable
causes.
OBD2
P-Code Ap-
Blink
plicable to:
Code
"32 Pin" (MSE
1.1) ECU/Sys-
tem Only
- -
21 P0335
22 P0120
22 P0122
22 P0123
23 P0601
24
31 P0174
24 690 01 Rev. K
1. Diagnostic display initiated through ignition key sequencing.
Long Pause
2.
3.
3
4. Long Pause
5.
6.
Long Pause
7.
Light remains on at end of transmission
Connection or Failure Description
No RPM Signal
Loss of Synchronization
TPS-Signal Implausible
TPS-Open or Short Circuit to Ground
TPS - Short Circuit to Battery
Defective ECU
Engine Speed Sensor
System too Lean
Short Pauses
2
6
"35 Pin"
(MA 1.7)
Metal-
Cased
ECU/
System
Y
Y
N
Y
Y
Y
Y
Y
KohlerEngines.com
EFI SYSTEM-BOSCH
Code 32
Code 61
1
"32 Pin"
"24 Pin"
(MSE
(MSE 1.0)
1.1)
Plastic-
Plastic-
Cased
Cased
ECU/Sys-
ECU/
tem
System
Y Y
Y Y
N N
Y Y
Y Y
Y Y
Y Y
Y Y
Note
2
9
6
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