![Kohler Command PRO EFI ECH749 [45/180] Efi system electronic throttle body etb ech](/img/pdf.png)
Kohler Command PRO EFI ECH749 [45/180] Efi system electronic throttle body etb ech
![Kohler Command PRO EFI ECH749 [45/180] Efi system electronic throttle body etb ech](/views2/1597403/page45/bg2d.png)
4524 690 01 Rev. O KohlerEngines.com
EFI SYSTEM-ELECTRONIC THROTTLE BODY (ETB) ECH
Troubleshooting-Oxygen (O2) Sensor
Condition Possible Cause Conclusion
Continuous low voltage output (less
than 400mV) observed with throttle
openings of 40% or more (lean
biased condition).
Fault codes P0131, P0171, or P0174
may set.
Shorted sensor or sensor circuit.
Shorted lead wire.
Wiring shorted to ground.
Replace sensor or replace and
properly route wiring.
Upstream or downstream exhaust
leaks observed.
Air leak at sensor.
Repair all exhaust leaks and torque
sensor to appropriate torque.
Style 1 (Smaller Sensor)
18 N·m (159 in. lb.).
Style 2 (Larger Sensor)
50.1 N·m (37 ft. lb.).
Restricted fuel supply. Resolve fuel supply issues from tank
to engine. Test fuel pressure. Perform
repairs necessary.
Misfi re A misfi re causing incomplete
combustion will result in lean (low
voltage) values.
Lean biased sensor failure. Replace sensor.
Continuous high voltage output
(600mV or more) observed with
throttle openings of 40% or less (rich
biased condition).
Fault codes P0172 or P0132 may set.
Silica poisoning. Replace sensor. Identify and resolve
root cause.
Contaminated gasoline. Purge fuel system and retest.
Wiring shorted to voltage. Replace damaged harness.
Overly rich condition due to
unmetered fuel entering combustion
chamber.
Test fuel pressure. Inspect fuel pump
vent and evaporative emissions
hoses for raw fuel fl ow.
Inspect engine oil for fuel
contamination; drain and refi ll if
suspect.
Perform repairs as necessary.
Cold engine. Engine temperature
below 150°F (66°C) as displayed by
KOHLER
®
Diagnostic System (KDS)
Gen 2, see Tools and Aids.
Normal operation, or engine operated
in an excessively cold environment.
Rich biased sensor failure. Replace sensor.
No activity from sensor.
KDS tool displays
1.015 Volts continuously.
Fault codes P0031 or P0032 may set.
Heater circuit open or shorted. Replace sensor.
Engine keyed ON with sensor
disconnected.
Historic codes.
Secure and/or confi rm sensor
connection and clear codes.
Contaminated gasoline. Purge fuel system and retest.
Содержание
- Ech630 ech749 ch735 ch26 ch745 service manual 1
- Safety 2
- Maintenance 3
- Maintenance 4
- Specifications 5
- Specifi cations 5
- Specifi cations 6
- Specifi cations 7
- Specifi cations 8
- Specifi cations 9
- Specifi cations 10
- Specifi cations 11
- Specifi cations 12
- Specifi cations 13
- Specifi cations 14
- Specifi cations 15
- Specifi cations 16
- Specifi cations 17
- Specifi cations 18
- Specifi cations 19
- Specifi cations 20
- Specifi cations 21
- Specifi cations 22
- Tools and aids 23
- Tools and aids 24
- Tools and aids 25
- Troubleshooting 26
- Troubleshooting 27
- Troubleshooting 28
- Troubleshooting 29
- Troubleshooting 30
- Air cleaner intake 31
- Efi system electronic throttle body etb ech 32
- Electronic fuel injection efi system electronic throttle body etb ech 32
- Efi system electronic throttle body etb ech 33
- Efi system electronic throttle body etb ech 34
- Efi system electronic throttle body etb ech 35
- Black connector side grey connector side ecu 36
- Efi system electronic throttle body etb ech 36
- Pinout of ecu 36
- Efi system electronic throttle body etb ech 37
- Efi system electronic throttle body etb ech 38
- Efi system electronic throttle body etb ech 39
- Efi system electronic throttle body etb ech 40
- Efi system electronic throttle body etb ech 41
- Efi system electronic throttle body etb ech 42
- Efi system electronic throttle body etb ech 43
- Efi system electronic throttle body etb ech 44
- Efi system electronic throttle body etb ech 45
- Efi system electronic throttle body etb ech 46
- Efi system electronic throttle body etb ech 47
- Efi system electronic throttle body etb ech 48
- Efi system electronic throttle body etb ech 49
- Efi system electronic throttle body etb ech 50
- Efi system electronic throttle body etb ech 51
- Efi system electronic throttle body etb ech 52
- Efi system electronic throttle body etb ech 53
- Efi system electronic throttle body etb ech 54
- Efi system electronic throttle body etb ech 55
- Efi system electronic throttle body etb ech 56
- Efi system electronic throttle body etb ech 57
- Efi system electronic throttle body etb ech 58
- 24 690 01 rev o kohlerengines com 59
- After turning key to off wait 10 seconds before turning to on to allow ecu to go to sleep 59
- Efi diagnostic flow diagram 59
- Efi system electronic throttle body etb ech 59
- Fuel pump module can be heard or a vibration can be felt to establish pump cycle fuel pump module will run for one 4 6 second cycle when ecu wakes up after being asleep 59
- Start of test 59
- Efi system electronic throttle body etb ech 60
- Efi system electronic throttle body etb ech 61
- Efi system ech 62
- Electronic fuel injection efi system ech 62
- Efi system ech 63
- Efi system ech 64
- Efi system ech 65
- Black connector side grey connector side ecu 66
- Efi system ech 66
- Pinout of ecu 66
- Efi system ech 67
- Efi system ech 68
- Efi system ech 69
- Efi system ech 70
- Efi system ech 71
- Efi system ech 72
- Efi system ech 73
- Efi system ech 74
- Efi system ech 75
- Efi system ech 76
- Efi system ech 77
- Efi system ech 78
- Efi system ech 79
- Efi system ech 80
- Efi system ech 81
- Efi system ech 82
- Efi system ech 83
- Efi system ech 84
- Efi system ech 85
- Efi system ech 86
- Efi system ech 87
- Efi system ech 88
- Efi system ech 89
- 24 690 01 rev o kohlerengines com 90
- After turning key to off wait 10 seconds before turning to on to allow ecu to go to sleep 90
- Efi diagnostic flow diagram 90
- Efi system ech 90
- Fuel pump module can be heard or a vibration can be felt to establish pump cycle fuel pump module will run for one 4 6 second cycle when ecu wakes up after being asleep 90
- Start of test 90
- Efi system bosch 91
- Electronic fuel injection efi system bosch 91
- Efi system bosch 92
- Efi system bosch 93
- Efi system bosch 94
- Efi system bosch 95
- Efi system bosch 96
- Efi system bosch 97
- Efi system bosch 98
- Efi system bosch 99
- Efi system bosch 100
- Efi system bosch 101
- Efi system bosch 102
- Efi system bosch 103
- Efi system bosch 104
- Efi system bosch 105
- Efi system bosch 106
- Efi system bosch 107
- Efi system bosch 108
- Efi system bosch 109
- Efi system bosch 110
- Efi system bosch 111
- Efi system bosch 112
- 24 690 01 rev o kohlerengines com 113
- 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 113
- Diagnostic display initiated through ignition key sequencing 113
- Efi system bosch 113
- Example of diagnostic display 113
- 24 690 01 rev o kohlerengines com 114
- Efi system bosch 114
- P0261 injector 1 short circuit to ground n a n a y 114
- P0262 injector 1 short circuit to battery n a n a y 114
- P1263 injector 2 open circuit n a n a y 114
- Efi system bosch 115
- Efi system bosch 116
- Efi system bosch 117
- Efi system bosch 118
- Efi system bosch 119
- Efi system bosch 120
- Efi system bosch 121
- Efi system bosch 122
- Efi system bosch 123
- Lubrication system 124
- Lubrication system 125
- Electrical system 126
- Electrical system 127
- Electrical system 128
- Electrical system 129
- Electrical system 130
- Electrical system 131
- Electrical system 132
- Starter system 133
- Starter system 134
- Starter system 135
- Starter system 136
- Disassembly inspection and service 137
- Disassembly inspection and service 138
- Disassembly inspection and service 139
- Disassembly inspection and service 140
- Disassembly inspection and service 141
- Disassembly inspection and service 142
- Disassembly inspection and service 143
- Disassembly inspection and service 144
- Disassembly inspection and service 145
- Disassembly inspection and service 146
- Disassembly inspection and service 147
- Disassembly inspection and service 148
- Disassembly inspection and service 149
- Disassembly inspection and service 150
- Disassembly inspection and service 151
- Disassembly inspection and service 152
- Disassembly inspection and service 153
- Disassembly inspection and service 154
- Disassembly inspection and service 155
- Disassembly inspection and service 156
- Disassembly inspection and service 157
- Reassembly 158
- Reassembly 159
- Reassembly 160
- Reassembly 161
- Reassembly 162
- Reassembly 163
- Reassembly 164
- Reassembly 165
- Reassembly 166
- Reassembly 167
- Reassembly 168
- Reassembly 169
- Reassembly 170
- Reassembly 171
- Reassembly 172
- Reassembly 173
- Reassembly 174
- Reassembly 175
- Reassembly 176
- Reassembly 177
- Reassembly 178
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