ADVERTICEMENT
FAULT CODE 197
Coolant Level - Data Valid But Below Normal Operating Range - Moderately Severe Level
Overview
CODE | REASON | EFFECT |
Fault Code: 197 | Coolant Level - Data Valid But Below Normal Operating Range - Moderately Severe Level. Low | None on |
PID: | engine coolant level detected. | performance. |
SPN: 111 | ||
FMI: 1/18 | ||
LAMP: Amber | ||
SRT: |
Coolant Level Sensor 1 Circuit - Industrial Engine
Coolant Level Sensor 1 Circuit - Marine Engines
Coolant Level Sensor 1 Circuit - Power Generation En
Circuit Description
The engine control module (ECM) supplies a 5-volt supply to the engine coolant level sensor using a common sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The coolant level sensor 1 monitors the engine coolant level within the coolant system and passes information to the ECM through the original equipment manufacturer (OEM) harness and engine harness.
Component Location
The coolant level sensor 1 is typically located in the radiator top tank or surge tank. Refer to the OEM service manual for location.
Shop Talk
Some engines are equipped with a 2-wire sensor instead of a 3-wire sensor. The 2-wire sensors do not have the 5-volt supply wire in the circuit. Possible causes of this fault code include:
Open return or signal circuit in the harness, connectors, or sensor
Signal wire shorted to sensor supply or battery voltage
An open supply circuit in the harness (on 3-wire sensors only).
Refer to Troubleshooting Fault Code t05-197.
Last Modified: 28-Nov-2012
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