Kohler Command PRO ECH630 Service Manual page 63

Code: 0117
Component: Coolant/Oil Sensor
Fault: Coolant/Oil Temperature Sensor
Circuit Low Voltage
Condition: Shorted connection, faulty sensor or
shorted wire.
Possible Causes:
1. Temperature Sensor Related
a. Sensor wiring or connection.
2. Engine Wiring Harness Related
a. Pin circuits Black 10 and Black 14 maybe
damaged or routed near noisy signal (coils,
stator, etc.).
b. ECU-to-harness connection problem.
Code: 0118
Component: Coolant/Oil Sensor
Fault: Coolant/Oil Temperature Sensor
Circuit High Voltage or Open
Condition: Shorted connection, faulty sensor, open
connection or broken wire.
Possible Causes:
1. Temperature Sensor Related
a. Sensor wiring or connection.
2. Engine Wiring Harness Related
a. Pin circuits ECU Black pin 10 and 14 may be
damaged.
b. ECU-to-harness connection problem or
broken wire.
3. System Related
a. Engine is operating above the 176°C (350°F)
temperature sensor limit.
Code: 0122
Component: Thrott le Position Sensor (TPS)
Fault: TPS Circuit Low Voltage or Open
Condition: Open connection, broken wire or faulty
sensor.
Possible Causes:
1. TPS Related
a. TPS bad or worn internally.
2. Engine Wiring Harness Related
a. Broken or shorted wire in harness.
1. ECU Black pin 10 to TPS pin 1.
2. ECU Black pin 12 to TPS pin 3.
3. ECU Black pin 16 to TPS pin 2.
3. Thrott le Body Related
a. Thrott le shaft inside TPS worn, broken, or
damaged.
b. Thrott le plate loose or misaligned.
c. Thrott le plate bent or damaged allowing extra
airfl ow past, or restricting movement.
4. ECU Related
a. Circuit providing voltage or ground to TPS
damaged.
b. TPS signal input circuit damaged.
Code: 0123
Component: Thrott le Position Sensor (TPS)
Fault: TPS Circuit High Voltage
Condition: Shorted connection or faulty sensor.
Possible Causes:
1. TPS Sensor Related
a. Sensor connector or wiring.
b. Sensor output aff ected or disrupted by dirt,
grease, oil, wear.
c. Sensor loose on thrott le body manifold.
2. Thrott le Body Related
a. Thrott le shaft or bearings worn/damaged.
3. Engine Wiring Harness Related
a. ECU pins Black 10, 12 and 16 damaged
(wiring, connectors).
b. ECU pins Black 10, 12 and 16 routed near
noisy electrical signal (coils, alternator).
c. Intermitt ent 5 volt source from ECU (pin
Black 16).
d. ECU-to-harness connection problem.
Code: 0131
Component: Oxygen Sensor
Fault: O2S 1 Circuit Low Voltage
Condition: Open connection, broken wire or faulty
sensor.
Possible Causes:
1. Oxygen Sensor Related
a. Sensor connector or wiring problem.
b. Sensor contaminated, corroded or damaged.
c. Poor ground path.
d. Pin circuit wiring or connectors.
ECU Black pin 10 or 17.
Section 5
EFI Fuel System
5.31
5