WASHER-TO BUTTON 3W6541 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the sensors or if any one of the diagnostic codes in Table 1 is active or easily repeated.
Table 1
Diagnostic Codes Table
Description Conditions which Generate this Code System Response
110-3 Engine Coolant Temperature Sensor voltage above normal The Electronic Control Module (ECM) detects signal voltage that is above normal for eight seconds.
The ECM has been powered for at least two seconds.
The engine has been running for seven minutes.
An engine coolant temperature that is less than −35 °C (−31 °F) will also activate this fault. The code is logged.
A snapshot is triggered.
The value of the parameter is set to 90 °C (194 °F).
110-4 Engine Coolant Temperature Sensor voltage below normal The ECM detects signal voltage that is below normal for eight seconds.
The ECM has been powered for at least two seconds.
An engine coolant temperature that is greater than 140 °C (284 °F) will also activate this fault. The code is logged.
A snapshot is triggered.
The value of the parameter is set to 90 °C (194 °F).
172-3 Intake Manifold Air Temperature Sensor voltage above normal The ECM detects signal voltage that is above normal for eight seconds.
The ECM has been powered for at least two seconds.
An intake manifold air temperature that is less than −35 °C (−31 °F) will also activate this fault. The code is logged.
A snapshot is triggered.
The value of the parameter is set to 70 °C (158 °F).
172-4 Intake Manifold Air Temperature Sensor voltage below normal The ECM detects signal voltage that is below normal for eight seconds.
The ECM has been powered for at least two seconds.
An intake manifold air temperature that is greater than 140 °C (284 °F) will also activate this fault. The code is logged.
A snapshot is triggered.
The value of the parameter is set to 70 °C (158 °F).
1836-3 Auxiliary Temperature Sensor voltage above normal The ECM detects signal voltage that is above normal for eight seconds.
The ECM has been powered for at least two seconds. The code is logged.
A snapshot is triggered.
The value of the parameter will be set to a default value.
1836-4 Auxiliary Temperature Sensor voltage below normal The ECM detects signal voltage that is below normal for eight seconds.
The ECM has been powered for at least two seconds. The code is logged.
A snapshot is triggered.
The value of the parameter will be set to a default value. System OperationUse this procedure to troubleshoot any suspect problems with the following sensors:
Engine coolant temperature sensor
Intake manifold air temperature sensor
Auxiliary temperature sensor (if equipped)
Fuel temperature sensor (if equipped)The sensor signal for the passive sensors is routed to terminal 1 of each sensor connector. The analog return for the passive sensors is routed from the ECM to terminal 2 of each sensor connector.
Illustration 1 g01382944
Schematic for the analog sensors
Illustration 2 g01382905
Locations of the analog sensors (typical left side engine view)
(1) Engine coolant temperature sensor
(2) Intake manifold air temperature sensor
(3) Fuel temperature sensor (if equipped)
(4) J2/P2 ECM connectors
(5) J1/P1 ECM connectors
Illustration 3 g01382997
Terminal locations at the P2