Name: Kohler Command PRO ECH730
Brand: Kohler
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5.37

Section 5

EFI Fuel System

Flow Chart Diagnostic Aids

Diagnostic Aid #1 SYSTEM POWER

(MIL does not illuminate when key is turned ON)

NOTE: MIL is installed by vehicle OEM. Twelve volt

supply to bulb will be part of vehicle wire

harness. Kohler key switch model will have

MIL on engine with 12V supply to bulb.

Possible causes:

1. Ba ery

2. Main system fuse

3. MIL light bulb burned out

4. MIL electrical circuit problem

Pin circuits Grey 3.

5. Ignition switch

6. Permanent ECU power circuit problem

Pin circuit Black 18.

7. Switched ECU power circuit problem

Pin circuit Black 15.

8 ECU grounds

9. ECU

Diagnostic Aid #2 FAULT CODES

(Refer to detailed fault code listing before ﬂ ow

chart and servicing information for the respective

components)

Code 0031 - Oxygen Sensor Heater Circuit High

Voltage

Code 0032 - Oxygen Sensor Heater Circuit Low

Voltage

Code 0107 - Manifold Absolute Pressure Sensor

Circuit Low Voltage or Open

Code 0108 - Manifold Absolute Pressure Sensor

Circuit High Voltage

Code 0112 - Intake Air Temperature Sensor

Circuit Low Voltage

Code 0113 - Intake Air Temperature Sensor

Circuit High Voltage or Open

Code 0117 - Coolant/Oil Temperature Sensor

Circuit Low Voltage

Code 0118 - Coolant/Oil Temperature Sensor

Circuit High Voltage or Open

Code 0122 - TPS Circuit Low Voltage or Open

Code 0123 - TPS Circuit High Voltage

Code 0131 - O2S 1 Circuit Low Voltage or Open

Code 0132 - O2S 1 Circuit High Voltage

Code 0171 - Maximum adaptation limit exceeded

Code 0172 - Minimum adaptation limit exceeded

Code 0174 - Lean fuel condition at high load or open

loop

Code 0201 - Injector 1 Circuit Malfunction

Code 0202 - Injector 2 Circuit Malfunction

Code 0230 - Fuel Pump Module Circuit Low Voltage

or Open

Code 0232 - Fuel Pump Module Circuit High Voltage

Code 0336 - Cranksha Position Sensor Noisy Signal

Code 0337 - Cranksha Position Sensor No Signal

Code 0351 - Cylinder 1 Ignition Coil Malfunction

Code 0352 - Cylinder 2 Ignition Coil Malfunction

Code 0562 - System Voltage Low

Code 0563 - System Voltage High

Code 61 - End of Code Transmission.

Diagnostic Aid #3 RUN/ON

(MIL remains ON while engine is running)*

Possible causes:

1. All current fault codes will turn on MIL when

engine is running.

NOTE: Either incandescent or LED type bulbs can

be used for the MIL as long as they do not

draw more than 0.1 amps. The bulb needs

to be rated at 1.4 Wa s or less, or needs to

have a total resistance of 140 Ω or more. LEDs

typically draw less than 0.03 amps.

Diagnostic Aid #4 CRANKSHAFT POSITION

SENSOR

(MIL does not turn oﬀ during cranking)

Possible causes:

1. Cranksha position sensor

2. Cranksha position sensor circuit problem, pin

circuits Black 4 and Black 13.

3. Cranksha position sensor/toothed wheel air gap

4. Toothed wheel

5. Flywheel key sheared

6. ECU

Diagnostic Aid #5 FUEL PUMP

(fuel pump not turning on)

Possible causes:

1. Main fuse

2. Fuel pump circuit problem, pin circuits Black 9

and Grey 17.

3. Fuel pump module

Diagnostic Aid #6 IGNITION SYSTEM

(no spark)

Possible causes:

1. Spark plug

2. Plug wire

3. Coil

4. Coil circuit(s), pin circuits Grey 10 and Black 1.

5. ECU grounds

Brand	Kohler
Model	Command PRO ECH730
Category	Crankshaft
Language	English

Kohler Command PRO ECH730 User Manual

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Kohler Command PRO ECH730 Specifications

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