User manual KOHLER CH18-750

[. . . ] SERVICE MANUAL COMMAND CH18-750 HORIZONTAL CRANKSHAFT Contents Section 1. Safety and General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 3 4 5 5A 5B 6 7 8 9 10 11 12 Section 2. Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 3. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section 4. [. . . ] Test fuel pump and relay operation as described earlier under ``Fuel Pump ­ Service. '' 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. Fault Codes The ECU continuously monitors engine operation against preset performance limits. If the operation is outside the limits, the ECU activates the MIL and stores a diagnostic code in its fault memory. If the component or system returns to proper function, the ECU will eventually self-clear the fault code and turn off the MIL. If the MIL stays illuminated, it warns the customer that 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 2-digit blink codes available based upon the style of ECU are listed on pages 5B. 355B. 36. The codes are accessed through the key switch and displayed as blinks or flashes of the MIL. Turn the key switch on-off-on-off-on, leaving it on in the third sequence. Any stored fault codes will then be displayed as a series of MIL blinks (from 2 to 6) representing the first digit, followed by a pause, and another series of blinks (from 1 to 6) for the second digit (see Figure 5B-43). It's a good idea to write down the codes as they appear, as they may not be in numerical sequence. 2. 3. 4. 5. 6. 5B. 34 Section 5B EFI Fuel System Example of Diagnostic Display 1. Figure 5B-43. Long Pause Light remains on at end of transmission 5B After the problem has been corrected, the fault codes may be cleared as follows. Disconnect the negative (-) battery cable from battery terminal, or remove the main fuse for the ECU for approximately 1 minute. The MIL should remain off if the problem was corrected, and the fault codes should not reappear (codes 31, 32, 33, and 34 may require 10-15 minutes of running to reappear). The following chart lists the fault codes, what they correspond to, and what the visual indications will be. Following the chart is a list of the individual codes with an explanation of what triggers them, what symptoms might be expected, and the probable causes. Diagnostic Code Summary OBD2 P-Code Applicable to: "32 Pin" Connection or Failure Description (MSE 1. 1) ECU/System Only P 0335 P 0120 P 0122 P 0123 P 0601 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 P 0174 System too Lean "35 Pin" (MA 1. 7) Metal-Cased ECU/System "24 Pin" (MSE 1. 0) Plastic-Cased ECU/System "32 Pin" (MSE 1. 1) Plastic-Cased ECU/System Blink C ode Note 21 22 22 22 23 24 31 Y Y N Y Y Y Y Y Y Y N Y Y Y Y Y Y Y N Y Y Y Y Y 9 6 2 cont. on next page 5B. 35 Section 5B EFI Fuel System OBD2 P-Code Applicable to: "32 Pin" Connection or Failure Description (MSE 1. 1) ECU/System Only P 0132 P 0134 P 0175 P 0020 P 0171 P 0172 P0117 P0118 N/A N/A P 1260 P 0261 P 0262 P 1263 P 0264 P 0265 P 1651 P 1652 P 1653 P 1231 P 1232 P 1233 O2 Sensor Circuit: Shorted to Battery O2 Sensor Circuit: No Activity Detected System too Rich O2 Sensor Control at Upper Limit Maximum Adaption Limit Reached Minimum Adaption Limit Reached Temperature Sensor Circuit: Shorted to Ground Temperature Sensor Circuit: Open Circuit or Short to Battery Failure Completing Autolearn - TPS Offset below minimum allowable limit Failure Completing Autolearn - TPS offset above maximum allowable limit Injector 1 - Open Circuit Injector 1 - Short Circuit to Ground Injector 1 - Short Circuit to Battery Injector 2 - Open Circuit Injector 2 - Short Circuit to Ground Injector 2 - Short Circuit to Battery Diagnostic Lamp - Open Circuit Diagnostic Lamp - Short Circuit to Ground Diagnostic Lamp - Short Circuit to Battery Pump Relay - Open Circuit Pump Relay - Short Circuit to Ground Pump Relay - Short Circuit to Battery End of Code Transmission Blink C ode "35 Pin" (MA 1. 7) Metal-Cased ECU/System "24 Pin" (MSE 1. 0) Plastic-Cased ECU/System "32 Pin" (MSE 1. 1) Plastic-Cased ECU/System Note 31 32 33 33 34 34 42 42 43 44 51 51 51 52 52 52 55 55 55 56 56 56 61 Y N Y Y Y Y Y Y N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Y N N Y Y Y Y Y Y N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A Y Y N Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y 3 8 7, 8 8 8 8 Note: 1. Diagnostic of "TPS - Signal Implausible" is disabled in code. "O2 Sensor Short to Battery" diagnostic detection is disabled with SAS fuel-cutoff calibrated out. "Temperature Sensor Signal Implausible": diagnostic detection is calibrated out, with TPLAUS set to -50°C. [. . . ] Adjust the carburetor, idle fuel needle, or idle speed adjusting screw as necessary. Refer to Section 5, the "Fuel System and Governor". Figure 11-104. Make sure the O-Ring is in place then reinstall the oil fill cap on the valve cover. See Figure 11-105. Testing the Engine It is recommended that the engine be operated on a test stand or bench prior to installation in the piece of equipment. [. . . ]