Kohler Command PRO ECV630 Service Manual page 68

EFI SYSTEM-BOSCH
After 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
Blink P-Code
Code Applicable to: "32
Pin" (MSE 1.1)
ECU/System Only
- -
21 P0335
22 P0120
22 P0122
22 P0123
23 P0601
24
31 P0174
31 P0132
32 P0134
33 P0175
33 P0020
34 P0171
34 P0172
42 P0117
68
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
O Sensor Circuit: Shorted to Battery
2
O Sensor Circuit: No Activity De-
2
tected
System too Rich
O Sensor Control at Upper Limit
2
Maximum Adaption Limit Reached
Minimum Adaption Limit Reached
Temperature Sensor Circuit: Shorted
to Ground
KohlerEngines.com
"24 Pin" "32 Pin"
(MSE 1.0) (MSE 1.1)
Plastic- Plastic-
Cased Cased
ECU/ ECU/
System System
Y Y
Y Y
N N
Y Y
Y Y
Y Y
Y Y
Y Y
N Y
N N
Y Y
Y Y
Y Y
Y Y
Y Y
Note
2
9
6
3
8
7,8
8
8
8
24 690 02 Rev. D